Water storage tank

An insulated water storage tank preferably constructed from a rigid or hard plastic is disclosed which, in conjunction with associated piping and a series of valves, is directly connected to a dwelling's regular water supply line. The storage tank is filled with the regular the water supply line by opening an access or fill valve and closing a supply or intake valve. When the tank is filled the fill valve is also closed and waters travels normally through the supply line bypassing the storage tank. In the event of an interruption of the regular water supply, for whatever reason, a shut-off valve, which is normally opened, is closed preventing water flow from the main water supply and the supply valve is opened to allow the water stored in the tank to enter into the water supply line, thus providing an auxiliary supply of water.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates generally to water storage, and more 
particularly, to a water storage tank which directly communicates with a 
conventional water supply line and is preferably used in emergency 
situations. 
2. Description of the Prior Art 
Approximately one-third of all United States residents are located in areas 
prone to natural disasters, such as floods, earthquakes, hurricanes, and a 
myriad of other situations that can and do interrupt normal water supply 
to such residents. Typically, when a natural disaster is expected, the 
affected residents normally overwhelm retail stores to purchase the basic 
needs in the event of an interruption of municipal services. One of the 
main basic supplies purchased is water, which is usually purchased in 
gallon containers, primarily for drinking purposes. The water purchased in 
gallon containers is primarily used for drinking purposes and, according 
to supermarket figures, these purchases are typically for ten gallons or 
less of water. Ten gallons of water is a sufficient amount to supply a 
normal family with drinking water for three to five days. Additionally, 
water for flushing toilets and washing is usually stored by filling 
bathtubs. Thus, the distribution and usage of such water supplies in the 
home is cumbersome and often inadequate. Some attempts in the prior art 
include U.S. Pat. Nos. 4,962,789; 4,718,452; 3,095,893; and 2,931,382. 
U.S. Pat. No. 4,962,789, issued to Benscoter, discloses an emergency fresh 
water reservoir which is connected between a municipal water supply line 
and a hot water heater for a building. Circulation of fresh water is 
assured and stagnancy of water is prevented during normal operation of a 
municipal water supply due to flow through emergency water reservoir to 
replenish water in the hot water heater, as hot water is utilized in the 
building. 
U.S. Pat. No. 3,095,893, issued to Martin, discloses a water storage tank 
system for use in buildings which is interposed between the water supply 
conduit and the plumbing facilities to automatically insure the 
maintenance of fresh water in all the tanks at all times. 
U.S. Pat. No. 4,718,452, issued to Maitland, discloses an emergency 
portable water storage system which includes a generally cylindrical water 
tank seated on a base member, with the tank having opposite dome-shaped 
portions. A garden hose is coupled to the outlet fitting for continuous 
replenishment of the supply water during use of the garden hose for normal 
tanks such as watering plants and shrubs. 
U.S. Pat. No. 2,931,382 discloses a water tank wherein water from a service 
entrance to a water distribution system of a building flows through the 
storage tank. In the event of cutoff of water supply, the tank is full of 
water for emergency use. 
The prior art fails to disclose a water storage tank which can be directly 
in connection and utilized with the existing main water supply line. 
Furthermore, the prior art devices require constant maintenance due to 
ongoing use of the tank and require the user to tap the water out of the 
bottom of the tank into a separate container and then carry the container 
to the desired location. It is therefore, to the effective resolution of 
the aforementioned problems and shortcomings of the prior art that the 
present invention is directed. 
SUMMARY OF THE INVENTION 
The present invention discloses a gravity-based water storage system that 
allows for continued use of existing faucets and toilets during any 
interruption of the normal water supply due to natural disasters or 
temporary interruptions, such as repairs or construction. The storage tank 
is preferably constructed from a rigid plastic and is either rectangular 
or cylindrical in shape, with a funnel bottom member. The storage tank can 
be constructed from other materials including metal, steel, porcelain, 
glass, etc. The storage tank can be hung on any interior or exterior wall 
above standard faucet height. 
The storage tank is directly connected to the normal water supply system 
and is controlled by a series of valves. Preferably, the tank is filled 
only when a need for an emergency supply of water is deemed necessary, 
such as a hurricane, tornado, storm, or flood warning. However, in 
locations which are prone to earthquakes, the storage tank may be kept 
filled at all times due to the uncertainty of when an earthquake will 
strike. When it is desired to use the water stored in the storage tank, a 
shut-off valve is provided to prevent water flow from the main water 
supply and an intake valve is opened allowing the water stored in the tank 
to be directed into the main line. Thus, the user is provided with fresh 
water which was collected and stored in the tank, prior to the 
contamination or potential contamination of the main water supply due to 
some occurrence, i.e. natural disaster, oil or chemical spill, tampering, 
pollutants, etc. 
The present invention allows a home owner to easily store his or her own 
municipally supplied water at a fraction of the cost and to maintain a 
relatively normal water distribution within the home through existing 
piping and faucets, during an emergency situation where a normal water 
supply is interrupted. 
It is an object of the present invention to provide a water storage tank 
which is directly connected to and fluidly communicates with the regular 
water supply system of a dwelling but which can be bypassed when not in 
use, such as during non-emergency periods. 
It is another object of the present invention to provide a water storage 
tank which allows a gravity-fed water supply to each of the existing 
faucets and commodes in the dwelling associated with the water supply 
through the regular water supply system of a dwelling.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
As seen in the drawings, the present invention provides a storage tank 
generally designated at 10, which includes a front wall 12, back wall 14, 
first side wall 16, and second side wall 18. Preferably, walls 12, 14, 16 
and 18 are constructed integral with each other. Tank 10 is, preferably, 
substantially rectangular in shape, however, such is not limiting and 
other shapes, such as cylindrical, may be provided for tank 10. Tank 10 
includes a funnel-shaped bottom member 20 and can have an open top end. An 
opening 26 can be disposed at the bottom of funnel member 20. Funnel 
member 20 is, preferably, constructed integral with walls 12, 14, 16 and 
18. Bottom member 20 is preferably funnel-shaped to create more pressure 
at the bottom of storage area 24 when forcing water through opening 26 by 
causing maximum gravity pressure on pipe 120a. 
A lid or cover 22 is provided and snugly fits over the top end of tank 10. 
Cover 22 is preferably designed to clip on to tank 10 by means of a 
conventional semi-flexible lip. However, other conventional attachment 
designs are available and are considered within the scope of the 
invention. Thus, access to a water storage area 24 of tank 10 is provided 
by removing lid 22. As access to water storage area 24 is not essential to 
the operation of the present invention, lid 22 can be constructed integral 
with walls 12, 14, 16 and 20 and, thus, unremovable. However, lid 22 is 
preferably removable, to allow the inside of tank 10 to be cleaned from 
time to time. 
A first fitting 30 can be disposed within an opening (not shown) in side 
wall 16 to provide access through side wall 16 to water storage area 24 of 
tank 10. Preferably, fitting 30 and its associated opening are disposed at 
or near the top end of side wall 16. A second fitting 34 is disposed 
within opening 26 for providing an escape route for water stored within 
water storage area 24, discussed in detail below. Preferably, fitting 34 
and opening 26 are disposed at the bottom most point of funnel member 20. 
In the preferred embodiment, tank 10 communicates with water supply line 7 
through a series of valves 50, 60, and 70, joints 80, 90 and 130 and 
associated piping 110, 120, 126, 128 and 136. The tank 10 is connected to 
water supply line 100 which is normally utilized for supply water to the 
various faucets, toilets, bathtubs/showers in the dwelling. Access valve 
50 has a first open end 52, a second open end 54 and a knob member 56. 
Intake valve 60 includes a first open end 62, a second open end 64 and a 
knob member 66. Similarly, shut-off valve 70 includes a first open end 72, 
a second open end 74 and a knob member 76. 
T-joint 80 includes a first open end 82, a second open end 84 and third 
open end 86 disposed perpendicular to first and second ends 82 and 84, 
respectively. T-joint 90 includes a first open end 92, a second open end 
94 and third open end 96 disposed perpendicular to first and second ends 
92 and 94, respectively. Elbow-joint 130 includes a first open end 132 and 
a second open end 134. Ends 134 are perpendicularly disposed from each 
other. 
Preferably, valves 50, 60 and 70 are conventional valves commonly used in 
plumbing system. Likewise, t-joints 80 and 90, and elbow-joint 130, are 
also conventional joints commonly used in plumbing system, and are 
typically constructed from PVC plastic, copper, steel, cast iron or other 
types of metals and plastics. The type of material selected for joints 80, 
90 and 130 should be consistent or the same as the material of piping 100, 
110, 120, 126, 128 and 136 which is also normally one of the 
above-mentioned materials. Furthermore, the material the various piping is 
constructed from should also be consistent, and is preferably, selected to 
match the material of the regular water supply line 100. 
Piping 100, 110, 120, 126, 128 and 136, joints 80, 90 and 130, valves 50, 
60 and 70, and fittings 30 and 34 all define water passageways extending 
therethrough from their respective first ends to their respective second 
ends. With respect to t-joints 80 and 90, water passageways are 
additionally defined through their respective third ends 86 and 96. 
Pipe 136 is attached at its first end to exposed end 32 of fitting 30 and 
is attached at its second end to end 134 of elbow-joint 130. Pipe 110b is 
attached at its first end to end 132 of elbow-joint 130 and is attached at 
its second end to end 52 of access valve 50. Pipe 110a is attached at its 
first end to end 54 of access valve 50 and is attached at its second end 
to perpendicular end 86 of t-joint 80. Pipe 120a is attached at its first 
end to exposed end 36 of fitting 34 and is attached at its second end to 
end 62 of intake valve 60. Pipe 120b is attached at its first end to end 
64 of intake valve 60 and is attached at its second end to perpendicular 
end 96 of t-joint 90. Pipe 126 is attached at its first end to end 92 of 
t-joint 90 and is attached at its second end to end 74 of shut-off valve 
70. Pipe 128 is attached at its first end to end 72 of shut-off valve 70 
and is attached at its second end to end 84 of t-joint 80. Thus, t-joints 
80 and 90 intersect main or regular water supply line 100. 
Prior to connecting tank 10 and its associated valves, joints, and piping, 
the main water supply for the dwelling should be turned off. Water supply 
line 100 is then cut by conventional means, i.e. hacksaw, pipe cutter, 
etc., to define first water supply line 100a and second water supply line 
100b. The exposed first end of water supply line 100b is attached to end 
94 of t-joint 90 while the remaining portion of water supply line 100b 
remains unaffected. Similarly, the first end of water supply line 100a is 
attached to end 82 of t-joint 80 while the remaining portion of the water 
supply line 100a remains unaffected. 
Pipes 100, 110, 120, 126, 128 and 136 are preferably permanently attached 
as described above by conventional means, commonly utilized in the 
plumbing industry, such as glues, cements, tapes, solder, welding, etc. 
Once tank 10 is properly connected as described above, during normal 
operation (non-emergency situations), tank 10 is preferably empty, valves 
50 and 60 are in their closed positions, and valve 70 is in its open 
position. In this situation, water flows through pipe 110a, t-joint 80, 
pipe 128, valve 70, pipe 126, t-joint 90 and pipe 100b to their desired 
location i.e. kitchen faucet, bathtub/shower, toilet, etc. In this 
situation, the water flows similarly as if no storage tank is connected to 
the water supply line. 
Preferably, t-joints 80 and 90 are provided for intersecting regular water 
line 100 with lines 110 and 120 which provide fluid communication to and 
from tank 10, respectively. In an alternative embodiment, in lieu of 
t-joint 80 and/or t-joint 90, self-taping valves (not shown) may be 
provided. The valves are attached to the desired location on water line 
100 by a clamp member associated with a plurality of screws for tightening 
the valve on pipe 100. The valve includes a puncturing member in which by 
turning the valve the puncturing member pierces or punctures through the 
pipe to create an opening through the pipe. The valve may also be provided 
with a rubber member for sealing the pipe opening and valve attachment 
point. Once the valve is properly attached and the pipe opening formed, 
access pipe member 110a is attached to the first self-taping valve similar 
to its attachment at end 86 of t-joint 80 and intake pipe member 120b is 
attached to the second self-taping valve similar to its attachment at end 
96 of t-joint 90. Furthermore, with the use of the self-taping valves, a 
portion of pipe 110 is still required to be removed for the attachment of 
shut-off valve 70. However, in this embodiment, pipes 126 and 128 are 
eliminated, and the open end of pipe 100a is attached to end 72 of valve 
70 and the open end of pipe 100b is attached to end 74 of valve 70. 
Accordingly, either t-joints 80 and 90 or the self-taping valves intersect 
water supply line 100. For purposes of discussion regarding the operation 
of the invention only t-joints 80 and 90 will be referred to. However, it 
should be understood that where t-joints 80 and 90 are mentioned below, 
the present invention can operate similarly with the substitution of the 
self-taping valves in lieu of the t-joints 80 and 90. 
When storage tank 10 is not utilized (preferably in non-emergency 
situations), access valve 50 and intake valve 60 are in their respective 
closed positions. Additionally, a shutoff valve 70 is in its open 
position. Thus, as described above, fluids, such as water, flow through 
pipe 100a, t-joint 80, pipe 128, valve 70, pipe 126, t-joint 90, and pipe 
100b and bypass tank 10. When it is recommended or required to store extra 
water (i.e. hurricane or tornado warnings, other potential contamination 
of the water supply may occur, etc.), access valve 50 is opened by turning 
knob 56 and storage tank 10 is filled via the pressure from water supply 
line 100. The pressure from water supply line 100 causes the water to 
travel from pipe 100a, into end 82 of t-joint 80 and out of end 86 of 
t-joint 80 through pipe 110a, valve 50, pipe 110b, elbow-joint 130, pipe 
136, fitting 30 and into water storage area 24. While tank 10 is being 
filled, intake valve 60 remains in its closed position and shutoff valve 
70 remains open. Once tank 10 is filled, access valve 50 is returned to 
its closed position by turning knob 56 in an opposite direction, and water 
once again flows as described above, bypassing tank 10. 
Where the water coming from water supply line 100a is not to be used, 
possibly due to potential contamination, the user merely closes shut-off 
valve 70 by turning knob 76 and opens intake valve 60 by turning knob 66. 
Valve 50 remains in its closed position. Accordingly, valve 50 is only 
opened when filling tank 10 and valve 60 is only opened when emptying tank 
10. When emptying tank 10, by forces of gravity, water stored in tank 
storage area 24 is supplied from area 24 through fitting 34, pipe 120a, 
valve 60, and pipe 120b, into end 96 of t-joint 90 and out of end 94 of 
t-joint 90 to water supply line 100b, for whatever desired use, i.e. 
faucets, commodes, bathtubs, showers, etc. Preferably, the water is stored 
within tank area 24 prior to any indication that water entering into the 
dwelling may be contaminated. Thus, when a contamination warning is given, 
the user has relatively large amount of water stored for use, that he or 
she knows is free from the fear of contaminations. Additionally, the 
stored water is directly tied into the users normal water supply line, 
causing minimal, if any, inconvenience to the user when utilizing the 
stored water. 
Tank 10 can be provided with a transparent or clear stored water level 
indicating means. In one embodiment, the indicating means can consist of a 
clear, vertical plastic strip 150 which is integrally disposed within 
front wall 12 of tank 10. However, other materials may be utilized for 
strip 150, such as glass, and are within the scope of the present 
invention. Thus, when filing tank 10, the user can readily determine the 
level of water to avoid overfilling tank 10. Strip 150 also allows the 
user to maintain a visual track of usage, to carefully monitor how much 
fresh water is available in the event of a prolong water shortage. 
Preferably, strip 150 is disposed within front wall 12, however, strip 150 
may be disposed in any of the walls of tank 10 and such other locations 
are within the scope of the invention. 
Tank 10 can be sized to hold any amount of water, and is not limited to any 
particular amount of water storage. However, preferably, tank 10 should at 
least be able to hold 30 gallons of water to provide for an adequate 
supply of water over several days. Furthermore, tank 10 can be constructed 
from various conventional materials such as plastic, fiberglass, glass, 
porcelain, metal, etc. Preferably, tank 10 is constructed from rigid 
plastic. 
As seen in FIG. 2, side wall 18 may be provided with a threaded aperture 
40, wherein access is provided to water storage area 24 of tank 10, 
independent of removable cover 22, for the insertion of conventional 
purification (iodine) tablets to further insure the sterility of the water 
stored within. A screw-in cap 41 is provided for mating with threaded 
aperture 40. To insert one or more purification tablets (not shown), the 
cap is removed by unscrewing and the tablet is inserted through aperture 
40 into the stored water. After the desired amount of tablets have been 
inserted, cap 41 is properly positioned within aperture 40 for sealing 
tank 10 and preventing debris from entering water storage area 24. 
Tank hanging means 250 may be provided for securely mounting tank 10 to a 
wall area 200 of a dwelling. The preferred rectangular shape of tank 10 
allows for placement of tank 10 against a flat wall. In one embodiment, 
hanging means 250 can consist of at least one bracket 260 having a ledge 
member 261 and being preferably integral with back wall 14 of tank 10, 
which mates with a similar configured bracket 262 having a ledge member 
263 and being conventionally secured to wall 200 preferably by screws 264 
(FIG. 7). In lieu of screws 264, studs, anchors, bolts, etc. may be 
utilized and are within the scope of the present invention. Furthermore, 
in lieu of brackets other conventional mounting means may be utilized and 
all are within the scope of the present invention. 
To secure tank 10 to wall 200, ledge member 261 of bracket 260 is received 
by respective ledge member 263 of bracket 262 to create an interlocking 
mating relationship between brackets 260 and 262. By providing hanging 
brackets 260 and 262 with their associated screws or studs, the weight of 
the tank and stored water is distributed over a relatively large area for 
sufficient support. 
In another embodiment, the tank can be utilized with a stand, thus 
eliminating the need for mounting tank 10 to wall 200. In either 
embodiment, tank 10 is preferably disposed above the highest water outlet 
in the dwelling and water supply line 100 to provide for a gravity fed 
water supply for each of the existing faucets, commodes, etc. in the 
dwelling and for maximum water flow. 
FIGS. 8 and 9 illustrate an alternative embodiment for the water storage 
device of the present invention and is generally designated as reference 
numeral 300. In this embodiment tank body 302, lid 304, transparent member 
306 and fittings 308 and 310 are similar in structure and function to tank 
body 12, lid 22, transparent member 150 and fittings 30 and 34. Tank body 
302 is mounted to a wall member or disposed on a stand means similar to 
tank body 12 described above. Tank body 302 may also include an aperture 
and cap member (similar to aperture 40 and cap 41) for the insertion of 
purification tablets. In lieu of separate of/on valves, joints and/or 
self-tapping valves, a water flow direction control means 320 can be 
provided and is associated with an inlet pipe 312 and an outlet pipe 314. 
Control means 320 includes a body member 322 disposed as part of normal 
water supply line 350. Body member includes a first open end attached to 
normal water line at 350a by conventional means, thus providing fluid 
communication between water line 350a and body member 322. Body member 322 
also includes a second open end attached to normal water line at 350b by 
conventional means, thus providing fluid communication between body member 
322 and water line 350b. 
Body member 322 also includes a first flanged pipe member 326 having an 
open exposed end which is attached to the first end of inlet pipe 312 by 
conventional means. The second end of inlet pipe is attached to fitting 
308 by conventional means. An inlet water control valve 326 is provided 
with flanged member 326 for controlling water flowing from water supply 
line 350a through inlet pipe 312 and into tank body 302. A second flanged 
pipe member 324 is also provided and has an open exposed end which is 
attached to the first end of outlet pipe 314 by conventional means. An 
outlet water control valve 330 is provided with flanged member 324 for 
controlling water flowing from tank body 302 through outlet pipe 314 and 
into water supply line 350b. A shut-off valve 332 is provided with body 
member 322 for controlling water normally flowing from water supply line 
350a through body member 322 and into water supply line 350b. Body member 
322, flanged pipe members 324 and 326, and valves 328, 330 and 332 are 
constructed from conventional means and in this embodiment are constructed 
as a one piece water flow direction control means 320. 
When storage tank system 300 is not utilized (preferably in non-emergency 
situations), inlet valve 328 and outlet valve 330 are in their respective 
closed positions. Additionally, shutoff valve 332 is in its open position. 
Thus, as described above, fluids, such as water, flow through pipe 350a, 
body member 322, valve 332, and pipe 350b and bypass tank 300. When it is 
recommended or required to store extra water (i.e. hurricane or tornado 
warnings, other potential contamination of the water supply may occur, 
etc.), inlet valve 328 is opened by turning an associated knob and tank 
body 302 is filled via the pressure from water supply line 350. The 
pressure from water supply line 350 causes the water to travel from pipe 
350a, into the first end of body member 322, through flange pipe 326 
(including valve 328), inlet pipe 312 and fitting 308 and into tank body 
302. While tank body 302 is being filled, outlet valve 330 remains in its 
closed position and shutoff valve 332 remains open. Once tank body 302 is 
filled, inlet valve 328 is returned to its closed position by turning its 
associated knob in an opposite direction, and water once again flows as 
described above, bypassing tank 300. 
Where the water coming from water supply line 350a is not to be used, 
possibly due to potential contamination, the user merely closes shut-off 
valve 332 by turning its associated knob and opens outlet valve 330 by 
turning its associated knob. Inlet valve 328 remains in its closed 
position. Accordingly, valve 328 is only opened when filling tank body 302 
and valve 330 is only opened when emptying tank body 302. When emptying 
tank body 302, by forces of gravity, water stored in tank body 302 is 
supplied from tank body 302 through fitting 310, outlet pipe 120a, and 
flanged pipe 324 (including valve 330), and out of the second end of body 
member 322 into water supply line 350b, for whatever desired use, i.e. 
faucets, commodes, bathtubs, showers, etc. Preferably, the water is stored 
within tank body 302 prior to any indication that water entering into the 
dwelling may be contaminated. Thus, when a contamination warning is given, 
the user has relatively large amount of water stored for use, that he or 
she knows is free from the fear of contaminations. Additionally, the 
stored water is directly tied into the users normal water supply line, 
causing minimal, if any, inconvenience to the user when utilizing the 
stored water. 
The instant invention has been shown and described herein in what is 
considered to be the most practical and preferred embodiment. It is 
recognized, however, that departures may be made therefrom within the 
scope of the invention and that obvious modifications will occur to a 
person skilled in the art.