e if two units 1 \u00bd if nine units water closet not included 2 pipe for up to 35

E if two units 1 ½ if nine units water closet not

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determine the minimum size of pipe for that branch, i.e. if two units - 1 ½”; if nine units, water closet not included - 2" pipe; for up to 35 units, water closet included, 3" or 4“; one water closet, 3" pipe; two or more water closets, 4". Table 3 shows how to size the soil or waste stack. Determine number of fixture units by Table 1 and find the proper size of stack in 3. No stack into which a water closet discharges should be less than 3" in diameter. The "branch interval" used in Table 3 means a vertical length of stack of not less than 8 feet, within which branches are connected. The total fixture units on all branches connected to a stack within any 8-foot length should not exceed the maximum permitted by the table in one branch interval.
DRAINAGE AND SEWERAGE SYSTEMS Sizing For Plumbing
DRAINAGE AND SEWERAGE SYSTEMS Sizing For Plumbing Item No. FIXTURE Trap & Trap Arm Size Drainage Fixture Units (DFU) 1 Bathtubs 38 2 2 Bidets 38 2 3 Clotheswashers* 51 2 4 Dental units or cuspidors 32 1 5 Drinking fountains 31 1 6 Floor drains 51 2 7 Interceptor* for grease, oil, etc. 51 3 8 Interceptor* for sand, auto wash, etc. 76 6 9 Laundry tubs 38 2 10 Mobile home park traps (one for each trailer) 76 6 11 Receptors* (floor sinks), indirect waste receptors for refrigerators, coffee urns, water station, etc. 38 1 12 Receptors*, indirect waste receptors for commercial sinks, dishwashers, air washers, etc. 51 3 13 Shower, single stall 51 2 14 Shower*, gang (one unit per head) 51 15 Sinks, and/or dishwashers (residential) 51 mm min waste 38 2 16 Sinks, bar, commercial 51 mm min. waste 38 2 17 Sinks, bar, private 38 mm min waste 38 1 18 Sinks, commercial or industrial, schools, etc., including dishwashers, wash up sink, and wash fountains 50.8 mm waste 38 3 19 Sink, flushing rim, clinic 76 6 20 Sink, service 51 3 21 Urinal, pedestal, trap arm only 76 6 22 Urinal, stall, separate trap 51 2 23 Urinal, wall-mounted, integral trap, trap arm only 51 3 24 Urinal, wall-mounted, blowout, integral trap, trap arm only 76 6 25 Urinal, wall-mounted, washdown or siphon jet, integral trap, tram arm only 51 2 26 Urinal, wall-mounted, washout, separate trap 50.8 mm min. waste 38 2 27 Wash basin, in sets 38 2 28 Wash basin (lavatory) single 32 1 29 Water closet,* private installation 76 4 30 Water closet, public installation 76 6 MINIMUM TRAP DIAMETERS AND DRAINAGE FIXTURE UNIT VALUES (NPCP 1995 ed.)
DRAINAGE AND SEWERAGE SYSTEMS Sizing House Drain Size is determined by the number of units drained by it. Proper Ф are: 2 units, 1 1/2"; 9 units, 2"; 25 units, 2 1/2". The size of stack, house drain, or sewer must be at least the size of the largest branch connected to it. The minimum size of a house drain receiving discharge from a WC should be 4" Ф , and should continue full size to the vertical stacks receiving the discharge of water closets. The drainage system should have one 3" Ф stack extended full size through the roof (w/o any WC) Sizing Vent Pipe The proper size for vent stack is determined by the total fixture units of the soil/waste stack it serves. A branch vent is sized by the number of units connected to it and the length of the pipe itself. No vent pipe should be less than 1 1/4" Ф , nor should a