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Plumbing Helpful Hints Residential Construction Bert Polk Plumbing Inspector Li

Plumbing Helpful Hints Residential Construction Bert Polk Plumbing Inspector Lincoln County 2015 Waste and vent fittings Vent 90 medium 90 long 90 1/16 bend ,1/8 bend ,1/6 bend , medium 90 san tee combination Y-1/8 Double combination Fixture Y-1/8 Fitting Vent 90, This fitting is to be used in the venting system only. This is not a drainage fitting because of its short sweep. Medium 90, This fitting can be used in the drainage system from a horizontal drain to a vertical drop in a drain. This can be used anywhere in the vent sys- tem. Waste and vent fittings Long sweep 90, this fitting can be Used anywhere in drain and vent system 1/16 bend– 22 1/2 degree bend. This fitting is used to offset drain and vent pipe. Can be used in any position. 1/8 bend– 45 degree bend. This fitting is used to offset drain and vent pipe. Can be used in any posi- tion. 1/6 bend-60 degree. This fitting is used to offset drain and vent pipe. Can be used in any position 2x1-1/2x1-1/2” san tee. This fitting is used for fixture connections from the wall to the trap under the sink. Combination y-1/8 bend. This fit- ting is used to connect a vertical drain to a horizontal drain or a Horizontal drain to a horizontal drain. Waste and vent fittings Double Fixture fitting. Used for connecting back to back fixtures with fixture rim heights at same level or under floor for back to back toilets. This is not a double san tee. Double combination y-1/8 bend. This fitting is used to connect a Horizontal drains to a vertical stack . Two way cleanout tee .To be used just outside of the building founda- tion on the sewer drain line. Double san tee. Used to connect two horizontal vents to a vertical stack. Fitting upside down. Trap adapter. This is used to con- nect the trap under a sink to the trap arm. Coupling. Used to connect pipes together. Drains and Vents Connecting horizontal drain to horizontal drain with Y fitting. San tee in vertical position. San tee in horizontal position not permitted as drainage fitting. Combination y-1/8 bend in hor- izontal position. Y-fitting receiving waste from sink. Y-fitting receiving waste from second floor sink. First floor sink. Second floor line Second floor sink. Connection of first floor and second floor vents. Drains and Vents Fixture Drain Size Vent size Trap size Toilet 3” 2” In Toilet Kitchen sink 2” 1-1/2” 1-1/2” Clothes washer 2” 1-1/2” 2” Lavatory sink 1-1/4” 1-1/4” 1-1/4” Laundry sink 2” 1-1/2” 1-1/2” Bathtub 2” 1-1/2” 1-1/2” Spa tub 2” 1-1/2” 1-1/2” Shower 2” 1-1/2” 2” Toilet vent Combined vent Vent from downstairs Lavatory sink drain. 2” kitchen drain 1-1/2” vent Vent just below window. Use drainage fittings. Vent from downstairs. Fixture fitting Toilet Vent going up to upstairs wall. Toilet drain in upstairs floor joist. Drains and Vents 1/4 inch per foot grade and hanger required every 48 inches.. Cleanouts under floor must have 18” behind it for access And be within 20 foot of crawl hole. Cleanouts are required for the kitchen sink. Cleanouts on the sec- ond floor of the building are not required. Two way cleanout outside of house is preferable or a end of line cleanout may be used. A sewer line must have cleanouts every 100 foot. Green tracer wire 18 ga. on sewer. End of line cleanout. Cleanouts are required for change of direc- tion over 135 degrees in horizon- tal turns. That’s 1-90 degree turn and 1-45 degree turn. Cleanout above washer so it can be used without moving washer The most common mistake is to use this san tee in a horizontal position as a drainage fitting. Drain pipe from sink, tub, toilet or shower is not permitted to drain into a san tee in a horizontal position. This fitting must be a combination y and 1/8 bend. See fittings page. This is horizontal Vents 1. The drainage system of the building must be vented by one or more pipes whose combined cross sectional area is at least equal to that of the largest required building drain line. This means that if the building main is 3” pipe you could vent with any combination of pipes that total 7 square inches. Pipe size Diameter of pipe 1-1/4” 1.2272 1-1/2” 1.7671 2” 3.1416 3” 7.0686 2. Using the chart above a 3” sewer would require 2-2” vents and 1-1-1/2” vent, 3.1416+3.1416+1.7671=8.0503. This is large enough for the 3” sewer. Vent 6” above roof. Never terminate vents in attic space. Hose for water test of the new waste system. Vents connecting together in attic. Vertical vent on bathtub drain in under floor crawl space. 1-1/2” vent. Vent connection of downstairs fixtures must be 6” above the overflow rims of fixtures on this floor. Bath tub P-Trap Drain line Washing Machine Rough Trap must be with in 6” to 18” above the floor 2” Standpipe to be a minimum of 18” to a maximum of 30” above P-trap. 1-1/2” vent threw roof or combine with other vents 2” P-trap 2” drain line 2x1-1/2x2 san tee Sinks 1-1/2” vent 2” drain line 1-1/2” P-trap 1-1/2” trap arm can be 3 foot 6” long Two lavatory sinks side by side with single drain. Two lavatory sinks back to back. . Two lavatory sinks side by side using a fixture fitting tee. Lavatory wet vent drain on toilet vent. A maximum of a 3 foot 6 inch trap arm Lavatory sink with y-fitting receiving waste from second floor. Kitchen sink waste and vent. Showers and Tubs Shower drain, 2” Drain and P-trap. San tee 1-1/2” Vent Shower drain, flat vent can be used where additional vertical clearance is required. See below. Bath tub drain with vertical vent. Bath tub drain with flat vent. Looking up at second floor, floor joist. Split face show- er drain Pressure balance shower valve is required. Tile shower liner. Liner slopes at a 1/4” per foot towards drain. Shower access box in concrete floor. 1-1/2” P-trap 2” drain 1-1/2” vent. Island Sink Waste and Vent 2” Drain line 1/4” per foot grade Floor line 1 1/2” cleanout Above floor@ Nearest wall 1 1/2 P-Trap 1-1/2” foot vent Under floor @1/4” Per foot grade Loop Vent One piece fitting or 2-45 and one 90. 1-1/2 vent threw roof Cleanout in sink cabinet Loop vent returns to drain line downstream of fixture drain Combination Fittings Y and 1/8 bend Loop vent to top of cabinet Rough in of loop vent and water One piece fitting Toilet Rough In 15 1/2 inches to center of flange. 30” minimum space for toilet. 12” rough from wall to center of flange Bathtub waste connection downstream of toilet drain. Vertical vent to wall above. Looking up at second floor , floor joist. Closet bend may have long turn 90. Six foot maximum from vent to closet flange. Waste connection downstream of toilet toilet Bathtub Vents Vent Toilet rough in 1 .The center of the floor flange should be 12” from the wall studding behind the toilet and 15-1/2” to each side of the center of the toilet flange to wall studs, 30” space required. 2. The toilet requires a 3” drain line. Up to 3 toilets may be installed on a 3” horizontal drain line, then at the point where the 4 th. Toilet drain line enters the building drain, the drain must be increased to a 4” drain line. 3. The toilet vent cannot be used as a drain for fixtures on the second floor of the building. 4. The closet bend can be up to 6 foot long. No drains from other fixtures may enter into the closet bend. Only down- stream of the vent. Water lines .Water pressure can be increased with a well pump and bellows tank. Expansion tank on water heater. This is used when there is a check valve on water service. Water shut off valve in valve box, outside in ground. With water pressure over 80 psi a pressure regulator is required. House water shut off under cabinet.. Pex manifold. 1. Water line sizing for a residential home can be quite complex, so here is a rule of thumb. Most two and three bathroom houses can be plumbed with a 1” water service to the house. Install the 1” pipe to the water heater so you will have enough water on the hot side to. There are a few things that must be done. The water pressure at the house must be 60 pounds and the total length of the pipe from the well or meter, to the farthest fixture, must be under 200 foot. No more than two fixtures may be installed on a 1/2“ pipe. 2. PVC water lines are not permitted in a house , only outside in ground. Hangers and Supports Materials Type of joint .Horizontal Vertical Copper pipe Soldered, Blazed 1-1/2 inch and smaller 6 foot. Each floor, uploads/s3/ plumbing-guide.pdf