Patent Publication Number: US-9428900-B2

Title: Rough-in adapter

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority from U.S. Provisional Patent Application No. 61/720,447 filed on Oct. 31, 2012, and U.S. Provisional Patent Application No. 61/886,319 filed on Oct. 3, 2013, both of which are incorporated herein by reference in their entireties. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a drain assembly for installation in a finished floor surface. More particularly, the present invention relates to an adjustable drain assembly that is configured to allow for positioning of a strainer at the same level of the finished floor surface at the time of installation. 
     2. Description of Related Art 
     Typical drain assemblies or drain fixtures are installed in a finished floor surface, such as a finished concrete floor or a tiled floor, to drain water or other liquids from a top surface of the floor and allow the liquid to flow into an underlying drain pipe. Typical drain assemblies include a drain body connected to the drain pipe and a drain head connected to the drain body. The drain head may include a grate or strainer at the top thereof to prevent large pieces of debris from entering and clogging the drain pipe. 
     The drain head typically includes a threaded portion that is threadably attached to the drain body or directly to the drain pipe. The height of the drain head may be minimally adjusted up or down by threading the drain head further into or out of the drain body or drain pipe. 
     During installation, the drain body and drain head are installed upon the drain pipe prior to pouring the surrounding concrete slab that defines the primary floor surface. Ideally, the drain is installed at the proper height to allow for proper drainage and so that the strainer or grate will be positioned flush with the final floor surface, i.e., at the same level as the finished concrete flooring or with any supplemental flooring, such as tiles, installed on top of the concrete slab. Because the drain body and the drain head must be installed prior to construction of the finished flooring, the drain assembly is subject to infiltration by debris, which requires cleaning after completion of the flooring, and damage during construction. 
     Further, once the finished concrete slab is constructed and set, it is usually impossible to raise or lower the level of the drain head and/or strainer without removing finished concrete from the area of the drain assembly. 
     SUMMARY OF THE INVENTION 
     Accordingly, there is a general need in the art for a drain assembly that allows for a void to be created in a finished concrete slab to allow for installation of a drain head after completion of the concrete slab so that the height of the drain head can be easily adjusted both during and after installation. There is also a general need in the art for a drain head that allows for easy installation of different strainers or grates on a drain assembly during and after installation. 
     According to one particular embodiment of the invention, a drain assembly is provided. The drain assembly includes a drain body configured to be connected to a drain pipe such that the drain body is in fluid communication with the drain pipe; and a drain head assembly adjustably connected to the drain body such that the drain head assembly is in fluid communication with the drain body. The drain head assembly includes a shank adjustably connected to the drain body; and a strainer assembly connected to a top of the shank, the strainer assembly including a strainer, an upper frame, and a lower frame connected to each other. The lower frame includes a connection feature configured to non-threadably and removably connect the strainer assembly to the top of the shank. 
     According to another particular embodiment of the invention, a drain assembly is provided. The drain assembly includes a drain body configured to be connected to a drain pipe such that the drain body is in fluid communication with the drain pipe; a drain head assembly adjustably connected to the drain body such that the drain head assembly is in fluid communication with the drain body, the drain head assembly including a shank adjustably connected to the drain body; and a cover configured to be removably connected to the shank in a position over the shank and to at least partially define a void in a poured concrete slab around the shank. 
     According to yet another particular embodiment of the invention, a method of installing a drain assembly in a finished floor surface is provided. The method includes providing a drain assembly. The drain assembly includes a drain body; a drain head assembly adjustably connected to the drain body such that the drain head assembly is in fluid communication with the drain body, the drain head assembly including a shank and a strainer assembly configured to be connected to a top of the shank; and a cover configured to be removably connected to the shank in a position over the shank. The method further includes adjustably connecting the shank of the drain head assembly to the drain body; connecting the drain body to a drain pipe such that the drain body is in fluid communication with the drain pipe; connecting the cover to the shank in the position over the shank; adjusting a height of the cover and the shank with respect to the drain body such that the cover is positioned at a level flush with an intended height of the finished floor surface; pouring a concrete slab around the cover and over the drain body such that the cover at least partially defines a void in the poured concrete slab around the shank; removing the cover from the shank; and connecting the strainer assembly to the top of the shank. 
     Further details and advantages of the invention will become clear upon reading the following detailed description in conjunction with the accompanying drawing figures, wherein like parts are designated with like reference numerals throughout. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded perspective view of a drain assembly in accordance with an embodiment of the present invention; 
         FIG. 2  is another exploded perspective view of the drain assembly of  FIG. 1 ; 
         FIG. 3  is an exploded view of the lower frame and the shank of the drain assembly of  FIG. 1 ; 
         FIGS. 4 a , 4 b , and 4 c    are a series of views illustrating the engagement between the lower frame and the shank of the drain assembly of  FIG. 1 ; 
         FIGS. 4D-4M  are a series of views illustrating an alternative embodiment of a lower frame of the drain assembly of  FIG. 1  and illustrating the engagement between the lower frame and the shank of the drain assembly of  FIG. 1 ; 
         FIG. 5  is a perspective view of the shank and the drain body of the drain assembly of  FIG. 1 ; 
         FIG. 6  is a schematic representation illustrating the installation of the drain assembly of  FIG. 1  in a finished floor surface; 
         FIG. 7  is a cross-sectional perspective view of a cover assembly in accordance with another embodiment of the present invention connected to the shank and drain body of the drain assembly of  FIG. 1 ; 
         FIG. 8  is a cross-sectional side view of the cover assembly of  FIG. 7  connected to the shank and drain body of the drain assembly of  FIG. 1 ; 
         FIG. 8A  is a cross-sectional side view of the cover assembly of  FIG. 7  according to an alternative embodiment of the present invention connected to the shank and drain body of the drain assembly of  FIG. 1 ; 
         FIG. 9  is a top view of a cover of the cover assembly of  FIG. 7 ; 
         FIG. 10  is a bottom view of the cover of the cover assembly of  FIG. 7 ; 
         FIG. 11  is a cross-sectional side view of the cover of the cover assembly of  FIG. 7  taken along lines  11 - 11  shown in  FIG. 9 ; 
         FIG. 12  is an enlarged bottom perspective view of a portion of the cover of the cover assembly of  FIG. 7 ; 
         FIG. 13  is a cross-sectional side view of a drain assembly in accordance with another embodiment of the present invention; 
         FIG. 14  is a side view of the drain assembly of  FIG. 13 ; 
         FIGS. 15A, 15B, 16A, and 16B  are cross-sectional side views of a rough-in adapter assembly in accordance with yet another embodiment of the present invention; 
         FIG. 17  is a detailed view of the rough-in adapter assembly of  FIGS. 15A-16B  taken from area “A” in  FIG. 15A  with the cover removed from the coring sleeve; and 
         FIG. 18  is a detailed view of the rough-in adapter assembly of  FIGS. 15A-16B  taken from area “A” in  FIG. 15A  with the cover positioned on the coring sleeve. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     For purposes of the description hereinafter, spatial orientation terms, if used, shall relate to the referenced embodiment as it is oriented in the accompanying drawing figures or otherwise described in the following detailed description. However, it is to be understood that the embodiments described hereinafter may assume many alternative variations and embodiments. It is also to be understood that the specific devices illustrated in the accompanying drawing figures and described herein are simply exemplary and should not be considered as limiting. 
     With reference to  FIGS. 1-4   c  and  5 , a drain assembly  10  for installation in a finished floor surface  29  is shown in accordance with an embodiment of the present invention. As shown in  FIGS. 1 and 2 , the drain assembly  10  includes a drain head assembly  11  adjustably connected to a drain body  16 . The drain head assembly  11  includes a shank  15  and a strainer assembly that includes a strainer  12 , an upper frame  13 , and a lower frame  14  connected to the shank  15 . The strainer  12  and upper frame  13  may be constructed of metal, with the strainer  12  being positioned inside the upper frame  13 . The lower frame  14  may be constructed of a plastic material. The shank  15  may be constructed from plastic or cast iron material. When assembled, the upper frame  13  will rest on the top surface of the lower frame  14 , and the strainer  12 , upper frame  13 , and lower frame  14  are secured to each other by fasteners, such as machine screws, that are inserted through the strainer  12  and the upper frame  13 , and threaded into the lower frame  14 . To that end, the lower frame  14  includes threaded holes  18  extending therethrough. The threaded holes  18  may be directly formed in the lower frame  14  or may be inserts made from a durable material, such as metal, that are molded into the lower frame  14 . As can be appreciated by one having ordinary skill in the art, the strainer  12 , upper frame  13 , and lower frame  14  may also be secured to each other by any suitable means, other than machine screws and threads. 
     The strainer assembly is fastened together and shipped as a single unit, and then assembled onto the drain assembly  10  during installation. It is to be appreciated that the strainer  12 , upper frame  13 , lower frame  14 , and the shank  15  may be made from any material(s) known to be suitable to those having ordinary skill in the art. Also, various configurations in the assembly of the strainer assembly are also possible. For instance, the upper frame  13  and the lower frame  14  may be combined into a single piece, with the strainer  12  fastened to the single frame piece. 
     As shown in  FIGS. 1-4   c , the lower frame  14  includes a connection feature that allows the lower frame  14  and, thus, the entire strainer assembly, to be non-threadably connected to a top end of the shank  15  to allow for easy assembly and removal of the strainer assembly from the shank  15 . In particular, the lower frame  14  includes at least two, and particularly three, equally circumferentially-spaced snap-on hooks  17  extending from a bottom surface of the lower frame  14 . The shank  15  includes at least two, and particularly three, complementary sets of lugs  19  at a top end thereof extending outward from a top ring  20  of the shank  15 . When the strainer assembly is assembled onto the shank  15 , the lower frame  14  is pressed down over the top surface of the shank  15  until the hooks  17  grab on to the top ring  20  formed at the top end of the shank  15  by bending outward and snapping over and onto the top end of the shank  15 . Each set of lugs  19  engages a respective one of the flexible hooks  17 . The lugs  19  are provided so that, when the lower frame  14  is assembled onto the threaded shank  15 , the hooks  17  may be positioned between the lugs  19  to prevent rotation of the lower frame  14  and the strainer assembly with respect to the threaded shank  15 . 
     Accordingly, it is to be appreciated that a variety of shapes and configurations of the strainer  12 , upper frame  13 , and lower frame  14  may be provided and used with a common or standard threaded shank  15  since the lower frame  14  is connected to the top end of the threaded shank  15  without the use of fasteners or other specialized hardware. In particular, the top flange geometry of the lower frame  14  may be molded into a plurality of sizes and configurations to accommodate a variety of strainers  12  and upper frames  13 . For instance, the lower frame  14  can be molded into various shapes, such as round or square, and into a variety of sizes to accommodate various finished assemblies of strainers  12  and upper frames  13 . Thus, the threaded shank  15  may be made standard and compatible with a variety of different configurations of the strainer assembly. Further, the threaded shank  15  may be replaced or reused without requiring replacement or reuse of a strainer assembly, and vice versa. 
     It is to be appreciated that the connection feature that allows for assembly of the lower frame  14  onto the threaded shank  15  may be of any configuration known to be suitable to those having ordinary skill in the art. According to an alternative embodiment of the present invention, the connection feature is a bayonet-type attachment mechanism, wherein one of the lower frame  14  or the threaded shank  15  includes lugs that engage within a circumferential groove formed in the other of the lower frame  14  or the threaded shank  15 . 
     As shown in  FIGS. 1, 2, and 5 , the drain body  16  includes a bottom outlet  21  that connects to a drain pipe (not shown), such that drain body  16  is in fluid communication with the drain pipe, and a lid  22  fastened to the outlet  21  in a standard configuration. The drain body  16  may be made from plastic or cast iron or other suitable materials. The lid  22  includes a protruding horn  23  thereon that has female threads on an inside surface thereof. The shank  15  includes external male threads on an outside surface thereof, such that the shank  15  may be threadably and adjustably connected to the drain body  16  such that the drain head assembly  11  is in fluid communication with the drain body  16  and installed to the required height with respect to the drain body  16  and the finished floor surface. It is to be appreciated that the shank  15  may be adjustably connected to the drain body  16  by suitable means other than a threaded connection. For instance, the shank  15  may be slidably connected to the drain body  16  and then locked in a vertical position by a suitable mechanism, or the shank  15  may include a plurality of notched steps that rest on lugs formed within an interior diameter of the drain body  16 . 
     With reference to  FIGS. 4D-4M , an alternative embodiment of a lower frame  14   a  is shown. The lower frame  14   a  includes six circumferentially spaced, flexible snap hooks  17   a  extending from a bottom surface of the lower frame  14   a . The flexible snap hooks  17   a  are interspaced by circumferential walls  17   b  that also extend from the bottom surface of the lower frame  14   a . The flexible snap hooks  17   a  are lengthened in comparison to the snap hooks  17  discussed above with reference to  FIGS. 1-4   c  in order to provide greater flexibility. The circumferential walls  17   b  extend a similar length as the flexible snap hooks  17   a . The provision of six snap hooks  17   a  to the lower frame  14   a  results in additional pull force resistance being provided to the lower frame  14   a . Three of the hooks  17   a  engage the top ring  20  of the shank  15  within the lugs  19  to prevent rotation of the lower frame  14   a , as discussed above. The other three snap hooks  17   a  engage the top ring  20  of the shank  15  for additional support. 
     As shown in  FIGS. 4I-4M , the top ring  20  of the shank  15  fits within the perimeter defined by the snap hooks  17   a  and the circumferential walls  17   b . In this manner, the circumferential walls  17   b  are positioned to resist shear force applied to the snap hooks  17   a  that may occur during usage and prevent forces from being applied to and damaging or breaking the snap hooks  17   a . The snap hooks  17   a  may also include reinforcement ribs to prevent breakage. Protruding bumps  14   b  may be formed in the lower frame  14   a  in order to promote making the snap hooks  17   a  with a longer length. The bumps  14   b  may be configured to have a tapered surface to prevent standing water from collecting on the lower frame  14   a . The lower frame  14   a  is installed on the shank  15  in the same manner as discussed above with respect to the lower frame  14 . The lower frame  14   a  also includes threaded holes  18   a  to allow the upper frame  13  and strainer  12  to be fastened to the lower frame, also in the same manner as discussed above. 
     With reference to  FIG. 6 , the drain assembly  10  is installed in the finished floor surface  29  with the aid of a rough-in cover  24 . As shown, during construction, the drain body  16  and the threaded shank  15  are connected to the drain pipe within the subflooring. The rough-in cover  24  is then positioned on the drain body  16  and over the shank  15  such that a bottom  27  of the cover  24  is in engagement with the lid  22  of the drain body  16 , and the threaded shank  15  is within an interior of the cover  24 . The cover  24  includes hooks  25  or other features extending from an interior surface  28  thereof that engages the top of the shank  15  to removably connect the cover  24  to the shank  15  in the same manner as the lower frame  14  discussed above. Thus, the threaded shank  15  and the rough-in cover  24  can be installed on to the drain body  16  and then adjusted to the required height, such that a top surface  26  of the rough-in cover  24  is positioned at a level flush with the intended height of the finished floor surface  29 . The concrete slab can then be poured around the cover  24  and over the drain body  16 , such that the cover  24  at least partially defines a void in a poured concrete slab of the finished floor surface  29  that allows for installation and adjustment of the drain head assembly  11 . In particular, because the cover  24  is positioned over and surrounds the shank  15  and extends to engage the lid  22  of the drain body  16 , the cover  24  fully defines the void. To that end, an expansible sealing material (not shown) may be provided between the bottom  27  of the cover  24  and the lid  22  of the drain body  16  to prevent infiltration of poured concrete material therebetween during the pour. 
     Once the concrete slab is poured and the finished floor surface  29  completed, the rough-in cover  24  can be removed from the shank  15 , which remains adjustable with respect to the drain body  16 , and the strainer assembly of the strainer  12 , upper frame  13 , and lower frame  14  can be connected to the top of the threaded shank  15  in the manner discussed above. The drain head assembly  11  can be adjusted to the proper height such that the strainer  12  is flush with the finished floor surface  29 . 
     With reference to  FIGS. 7-12 , a cover assembly  100  for use as a rough-in cover is shown in accordance with another embodiment of the present invention. As shown in  FIGS. 7 and 8 , the cover assembly  100  is configured to be installed on the drain body  16  to surround the shank  15  prior to pouring of the concrete slab around the drain assembly. The cover assembly  100  includes a protector sleeve  101  and a cover  102 . The cover  102  has a top surface  103  and a bottom  104 , and is configured to be positioned over the shank  15 . In particular, the cover  102  is positioned on and removably connected to the top of the shank  15 . 
     The protector sleeve  101  is positioned between the bottom  104  of the cover  102  and the lid  22  of the drain body  16 , and surrounding the shank  15 . The protector sleeve  101  may be made from a flexible foam material so that it becomes compressed between the cover  102  and the drain body  16  during assembly and prevents the intrusion of concrete between the cover  102  and the drain body  16  to the shank  15  while concrete is poured around the drain body  16  and the cover assembly  100 . In this manner, the cover  102  and the protector sleeve  101  in combination define a void in the poured concrete slab to allow for installation and adjustment of the drain head assembly  11 . 
     At least one projection  106 ,  107 ,  108  is disposed on the bottom  104  of the cover  102  for engaging the protector sleeve  101  to retain the position of the protector sleeve  101  and for engaging the shank  15  to removably connect the cover  102  to the shank  15 . More specifically, the bottom  104  of the cover  102  includes an outer annular projection  106  forming a ring within the outer perimeter of the cover  102 . The bottom  104  of the cover  102  also includes a plurality of inner arc-shaped projections  107  that are substantially concentric with the outer annular projection  106 , and at least two inner flexible projections  108  that are substantially aligned with the diameter of the arc-shaped projections  107  and may also be arc-shaped concentric with the inner arc-shaped projections  107  and the outer annular projection  106 . In this manner, the inner arc-shaped projections  107  and the inner flexible projections  108  form an inner ring within the diameter of the outer ring defined by the outer annular projection  106 . The inner and outer rings define a channel  110  between them and are configured to engage the protector sleeve  101  to retain the protector sleeve  101  within the channel  110  in its position surrounding the shank  15 , and to prevent the intrusion of poured concrete to the shank  15 . The inner flexible projections  108  may include snap hooks  109  on the lower ends thereof and are configured to engage the top ring  20  of the shank  15  so that the cover  102  is removably connected to the top of the shank  15 . 
     During construction, the drain body  16  and the threaded shank  15  are connected to the drain pipe within the subflooring. The rough-in cover assembly  100  is then installed onto the drain body  16  and over the threaded shank  15  such that the protector sleeve  101  is retained within the channel  110  formed between the projections  106 ,  107 ,  108  on the bottom  104  of the cover  102  and positioned between the bottom  104  of the cover  102  and the lid  22  of the drain body  16  to surround the threaded shank  15 , and such that the cover  102  is removably connected to the threaded shank  15  via the engagement of the flexible projections  108  with snap hooks  109  and the top ring  20  of the threaded shank  15 . Thus, the threaded shank  15  and the rough-in cover assembly  100  can be installed on to the drain body  16  and then adjusted to the required height, such that the top surface  103  of the rough-in cover  102  is positioned at a level flush with the intended height of the finished floor surface. The concrete slab can then be poured around the cover assembly  100  and the drain body  16 , such that the cover assembly  100  defines a void in the finished floor surface that allows for installation and adjustment of the drain head assembly  11 . 
     Once the concrete slab is poured and the finished floor surface completed, the rough-in cover assembly  100  can be removed from the threaded shank  15 , which remains adjustable with respect to the drain body  16 , and the strainer assembly of the strainer  12 , upper frame  13 , and lower frame  14  can be connected to the top of the threaded shank  15  in the manner discussed above. The drain head assembly  11  can be adjusted to the proper height such that the strainer  12  is flush with the finished floor surface. The top surface  103  of the cover  102  may include a notch or recess  105  to facilitate removal of the cover  102  from the finished concrete slab. 
     It is to be appreciated that the configuration of the cover  102  and the projections  106 ,  107 ,  108  may be altered in any manner known to be suitable to one having ordinary skill in the art so as to engage and retain the protector sleeve  101  between the cover  102  and the drain body  16 , and to removably connect the cover  102  to the top of the threaded shank  15 . The cover  102  may also be configured to have additional material thickness or the thickness may be increased by applying a layer of foam to the bottom  104  of the cover  102  so as to increase the size of the void in the poured concrete slab created by the cover  102  and facilitate access to the threaded shank  15  for installation and adjustment of the drain head assembly  11 . 
     With reference to  FIG. 8A , an alternative embodiment of the cover assembly  100  is shown. According to this embodiment, a protector sleeve  101   a  is provided with an increased material thickness and a reduced inside diameter as compared to the protector sleeve  101  discussed above with reference to  FIGS. 8 and 9-12 . As shown, the protector sleeve  101   a  is therefore wrapped tightly around the perimeter of the shank  15  to define the void in the finished concrete surface and to prevent infiltration of concrete to the threads or other connection features present on the shank  15 . The engagement of the protector sleeve  101   a  tightly wrapped around the shank  15  serves to maintain the position of the protector sleeve  101   a  on the shank  15  during installation of the drain assembly  10  and pouring of the concrete slab. The protector sleeve  101   a  is not engaged within the channel  110  formed by the projections  106 ,  107 ,  108  formed on the bottom  104  of the cover  102 . Instead, the protector sleeve  101   a  may be positioned on the shank  15  such that it abuts against the lowermost edges of the arc-shaped projections  107  extending from the bottom  104  of the cover  102  to prevent concrete from infiltrating to the engagement between the snap hooks  109  of the flexible projections  108  and the top ring  20  of the shank  15 . 
     With reference to  FIGS. 1-12 , according to one embodiment of the invention, a method of installing a drain assembly  10  in a finished floor surface  29  includes providing the drain assembly  10  described above with reference to  FIGS. 1-12 ; adjustably connecting the shank  15  of the drain head assembly  11  to the drain body  16 ; connecting the drain body  16  to a drain pipe such that the drain body  16  is in fluid communication with the drain pipe; connecting the cover  24 ,  102  to the shank  15  in the position over the shank  15 ; adjusting a height of the cover  24 ,  102  and the shank  15  with respect to the drain body  16  such that the cover  24 ,  102  is positioned at a level flush with an intended height of the finished floor surface  29 ; pouring a concrete slab around the cover  24 ,  102  and over the drain body  16  such the cover  24 ,  102  at least partially defines a void in the poured concrete slab around the shank  15 ; removing the cover  24 ,  102  from the shank  15 ; and connecting the strainer assembly to the top of the shank  15 . The method may further include providing a protector sleeve  101  and positioning the protector sleeve  101  between a bottom  104  of the cover  102  and the drain body  16 , and surrounding the shank  15 . The method may also further include adjusting the drain head assembly  11  such that a top of the strainer assembly is flush with the finished floor surface  29 . 
     With reference to  FIGS. 13 and 14 , a drain assembly  50  for installation in a floor surface according to another embodiment of the present invention is shown. The drain assembly  50  includes a rough-in adapter  51  having an exterior surface with male threading that is threadably connected to an interior female threaded surface of a drain body  52 , such that the rough-in adapter  51  is adjustably connected to the drain body  52 . The rough-in adapter  51  also includes an interior surface with female threading that accepts a drain head assembly  53 , such that the drain head assembly  53  is adjustably connected to the rough-in adapter  51 . 
     The drain head assembly  53  includes a threaded shank  54 , a frame  55 , and a plastic snap ring/lower frame  56 . The frame  55  receives a strainer (not shown) that covers the drain opening. The frame  55  includes a bottom flange  60  and the snap ring  56  includes at least two circumferentially-spaced flexible hooks  58  extending from a top surface thereof that engage the bottom flange  60  of the frame  55  by snapping on to the bottom flange  60  to connect the frame  55  to the snap ring  56 . Similarly, the threaded shank  54  includes a top flange  59  and the snap ring  56  includes a plurality of circumferentially-spaced hooks  57  extending from a bottom surface thereof that snap on to the top flange  59  to connect the snap ring  56  to the top of the threaded shank  54 . Thus, the frame  55  and strainer can be connected to the threaded shank  54  by the snap ring  56  in a manner similar to the connection between the strainer assembly and the threaded shank  15  discussed above with respect to the embodiment shown in  FIGS. 1-6 . 
     The rough-in adapter  51  may also be provided with a cover (not shown) that fits within the top of the adapter  51 , like a plug, or over the adapter  51  similar to the rough-in cover  24  discussed above with reference to  FIG. 6 . The cover prevents infiltration of concrete into the rough-in adapter  51  during the pour and defines a void in the finished floor surface to allow for installation and adjustment of the drain head assembly  53 . In particular, during installation, the rough-in adapter  51  and drain body  52  are secured to a drain pipe (not shown) installed within the subflooring. The height of the rough-in adapter  51  is then adjusted with respect to the drain body  52  such that the cover is at a position flush with the intended level of the poured concrete slab. The concrete is then poured around the drain body  52  and the rough-in adapter  51  to the intended level such that the rough-in adapter  51  at least partially defines a void in the poured concrete slab suitable for installation of the drain head assembly  53 . When the concrete slab is finished, the cover is removed from the rough-in adapter  51  and the drain head assembly  53  is installed such that the strainer is positioned at a level flush with the finished floor surface. 
     With reference to  FIGS. 15A-18 , a rough-in adapter assembly  75  for use in the installation of a drain assembly in a finished floor surface in accordance with another embodiment of the present invention is shown. The rough-in adapter assembly  75  includes a coring sleeve  76  having a lower stem  77  and a top flange  80  extending outwardly from the lower stem  77 . A central opening  89  extends through the coring sleeve  76  from the top flange  80  to the bottom of the lower stem  77 . The lower stem  77  includes male threads  78  on an exterior surface to allow for the coring sleeve  76  to be adjustably connected to a drain body (not shown) or drain pipe (not shown), and female threads  79  on an interior surface to allow for a drain head assembly (not shown) to be adjustably connected to the coring sleeve  76  within the central opening  89  to place the drain head assembly in communication with the drain body and/or drain pipe. 
     The rough-in adapter assembly  75  also includes a cover  81 ,  82 . According to the embodiment shown in  FIGS. 15A-18 , the top flange  80  of the coring sleeve  76  is configured to engage a 6″ cover  81  ( FIGS. 15A &amp; 15B ) or a 5″ cover  82  ( FIGS. 16A &amp; 16B ), depending on the size of the drain assembly to be used with the coring sleeve  76 . The cover  81 ,  82  includes a plurality of non-continuous circumferentially-spaced legs  83  extending downward from an inside surface of the top of the cover  81 ,  82 . According to a particular embodiment, the cover  81 ,  82  includes six equally spaced legs  83 . The legs  83  each include a projection formed at an end thereof in the form of a hook or tooth that is configured to snap into a groove  86  formed in the top flange  80  of the coring sleeve  76  at the mouth of the central opening  89  to releasably secure the cover  81 ,  82  to the coring sleeve  76 . An outside rim  84  of the cover  81 ,  82  fits within a complementary annular recess  87 ,  88  formed in the top flange  80  of the coring sleeve  76  when the cover  81 ,  82  is secured to the coring sleeve  76 . 
     During installation, the rough-in adapter assembly  75  is threadably secured to the drain body and/or the drain pipe installed within the subflooring. The height of the rough-in adapter assembly  75  is then adjusted such that the top surface of the cover  81 ,  82  is at a position flush with the intended level of the poured concrete slab. The concrete is then poured around the rough-in adapter assembly  75  to the intended level, with the top flange  80  and the cover  81 ,  82  in combination defining a void in the concrete slab to allow for installation and adjustment of a drain head assembly. When the concrete slab is finished, the cover  81 ,  82  is removed from the coring sleeve  76  and the drain head assembly is installed, such that the strainer is positioned at a level flush with the finished floor surface. The top surface of the cover  81 ,  82  may include a notch or recess  85  to facilitate removal of the cover  81 ,  82  from the finished concrete slab. 
     While specific embodiments of the invention have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure. The presently preferred embodiments described herein are meant to be illustrative only and not limiting as to the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalents thereof.