3 4 6 8 The minimum distance from a 4-inch trap arm to the vent is ______ inches. 2 ½ 3 4 6 8 The minimum distance from a 1 ½ inch trap arm to the vent is ______ inches. 2 ½ 3 4 6 8 The maximum length of a 2-inch diameter trap arm is ______ inches. 30 42 60 72 120 The maximum length of a 1 ½ inch diameter trap arm is ______ inches. 30 42 60 72 120 The maximum length of a 3-inch diameter trap arm is ______ inches. 30 42 60 72 120 To avoid a possible blocked vent, use a Sanitary Tee to connect the trap arm to a vertical drain/vent. True Answer questions 16-20 to correctly size the vent for a “clothes washer” that is 28 feet in length. The minimum trap arm size is ______. 1 ¼ inch 1 ½ inch 2 inches 3 inches The clothes washer is rated at ______ DFU / DFUs. 1.0 2.0 3.0 4.0 5.0 The minimum distance from the trap to the vent is ______ inches. 2 ½ 3 4 6 8 The maximum length of the trap arm is ______ inches. 30 42 60 72 120 The minimum diameter sized vent for this application is ______. 1 ¼ inch 1 ½ inch 2 inches 3 inches 4 inches Quiz 3 Vent piping be permitted to be omitted on an interceptor where such interceptor acts as a primary settling tank and discharges through a horizontal indirect waste pipe into a secondary interceptor. True False Traps serving sinks that are part of the equipment of soda fountains need not be vented if they can be discharged into an approved floor sink. True False
DWV copper tubing has ______ or ______ colored printing on the tube sides. black – red black – white red – blue yellow – green yellow – light orange Type K copper piping is labeled in ______ lettering. Red Yellow Green Blue Type L copper piping is labeled in ______ lettering. Red Yellow Green Blue Type M copper piping is labeled in ______ lettering. Red Yellow Blue Type DWV copper piping is labeled in ______ lettering. Red Yellow Green Blue Type ______ copper tubing has the thickest wall. K L M DWV A water closet (WC) needs a vent of at least ______ in diameter. 1 ¼ inches 1 ½ inches 2 inches 3 inches 4 inches 7-3 DRAINAGE FIXTURE UNIT VALUES (DFU) - Private usage PLUMBING FIXTURE MIN. SIZE TRAP ARM PRIVATE DFU Bathtub/Shower (BT) 1 ½ 2.0 Lavatory single (LAV) 1 ¼ 1.0 Sink – domestic (KS) 1 ½ 2.0 Water closet (WC) 3 3.0 Clothes Washer (ACW) 2 3.0 Cross Sectional Area Table Standard Pipe Dia. Cross Sectional Area 1 ½” 1.77 sq. in. 2” 3.14 sq. in
3” 7.07 sq. in. 4” 12.56 sq. in. TABLE 7-5 MAX. UNIT LOADING AND MAX. LENGTH OF VENT PIPING SIZE OF PIPE (inches) 1 ¼ 1 ½ 2 3* 4 Maximum DFUs Drainage Piping Vertical Horizontal 1 1 2 1 16 8 48 35 256 216 Vent Piping Horizontal and Vertical Maximum DFUs Maximum Lengths (feet) 1 45 8 60 24 120 84 212 256 300 Questions 10-14 are to correctly size the above double bath system diagram. Vertical height – 18 feet The total DFU load for this system is: 3.0 11.0 14.0 17.0 22.0 Minimum size building sewer is: 1 ½ inch 2 inch 3 inch 4 inch 6 inch Minimum size for vent A is: 1 ¼ inches 1 ½ inches 2 inches 3 inches 4 inches Minimum size for vent B is: 1 ¼ inches 1 ½ inches 2 inches 3 inches 4 inches Minimum size for vent C is: 1 ¼ inches 1 ½ inches 2 inches 3 inches 4 inches A vent of _____ diameter is needed to bring this installation into code compliance. 1 ½ inches 2 inches 3 inches 4 inches no additional venting needed The following pipe sizes are referenced in the UPC but are generally not commercially available for purchase: 1 ¼ inch pipe size 2 ½ inch pipe size 3 ½ inch pipe size all of the answers provided none of the answers provided A pipe diameter is increased from 2 to 3 inches. This would mean that the increase would be ______ larger. 1 pipe size 1 ½ pipe sizes 2 pipe sizes 2 ½ pipe sizes 3 pipe sizes A building drain of 4 inches is installed that has 4 fixtures with 2-inch diameter vents (VTR) at each fixture. Does this meet code requirements? (Choose the best answer) Yes – because 2 vents at 2 inches is 4 inches. Yes – because 4 vents at 2 inches has a cross section greater than a 4-inch drain. Yes – all 4 fixtures will probably not be used at the same time. No – because Sanitary Tees used for vent fittings were not inverted.
A Sanitary Tee can be used on its “back” when installing a vent on a horizontal drain line. True False Once a vent pipe penetrates the roof, it may be reduced by ______ pipe size(s). 1 2 code doesn’t address this situation code allow the vent pipe to be reduced in size Two fixtures a common vertical vent pipe may be installed on the same level if ______ fitting(s) is/are used. a double fixture a double sanitary tee a Wye 1/8 bend two back to back long sweep none of the answers provided Quiz 5 Each vent pipe or shall extend through its flashing and terminate vertically not less than ______ inches above the roof. 6 12 18 24 30 Each vent pipe or stack shall extend through its flashing and terminate vertically not less than ______ inches from a vertical surface. 6 12 18 24 30 Each vent shall terminate not less than ______ from an openable window, door, opening, air intake, or vent shaft. 1 foot 3 feet 5 feet 10 feet 15 feet Each vent shall terminate not less than ______ above an openable window, door, opening, air intake, or vent shaft. 1 foot 3 feet 5 feet 10 feet 15 feet Each vent terminate not less than ______ in every direction from a lot line, alley or street. 1 foot 3 feet 5 feet 10 feet 15 feet If a vent is within ______ of a roof that is used for weather protection, the vent must be at least ______ above the roof. 10 feet – 10 feet 10 feet – 20 feet 7 feet – 10 feet 10 feet – 7 feet none of the answers provided Vent pipes for outdoor installations shall extend not less than ______ above the surrounding ground, and shall be securely supported. 1 foot 3 feet 5 feet 10 feet 15 feet The weight of a lead used for flashing on a vent terminal through the roof will need to be at least ______ per square foot. 1 pound 3 pounds 5 pounds 10 pounds 15 pounds In areas where there is frost or snow, change in vent diameter will need to be made inside the building not less than ______ below the roof in an insulated space.