A Plumbing Materials, Equipment, Use Restrictions and Applicable Standards

Section 890 Section 890.APPENDIX A   Plumbing Materials, Equipment, Use Restrictions and Applicable Standards Section 890.TABLE E   Drainage Fixture Units (D.F.U.) Per Fixture Group Type of Fixture D.F.U./Fixture (Load) Minimum Size of Trap 2 (inches) Bathroom groups: 1 tank water closet, 1 lavatory with 1¼ inch trap and 1 bathtub 1 or shower stall 7 1¼ 1 water closet with flush valve, 1 lavatory with 1¼ inch trap and 1 bathtub or shower 1 11 Bathtub (with or without overhead shower) 1 2 1½ Bathtub 1 3 2 Bidet 2 1½ Clothes washer, automatic 3 2 Dental unit or cuspidor 1 1¼ Drinking fountain ½ 1 Dishwasher 2 , domestic 2 1½ Floor drains See Appendix A, Table F 2 Lavatories: Lavatory 1 1¼ Lavatory 2 1½ Lavatory, barber, beauty parlor 2 1½ Lavatory, dental 1 1¼ Lavatory, surgeon's 2 1½ Laundry tray (1 or 2 compartments) 2 1½ Type of Fixture D.F.U./Fixture (Load) Minimum Size of Trap 2 (inches) Shower stall 3 2 Showers (group) per head 2 3 2 Sinks: Combination sink and tray 3 1½ Combination sink and tray with food-disposal unit 4 Separate Traps 1½ Flushing rim (with valve) 8 3 Kitchen sink, domestic 2 1½ Kitchen sink, domestic, with food-waste grinder 3 Separate Traps 1½ Pot, scullery, etc. 2 4 1½ Service (P trap) 3 3 Service (P trap) 2 2 Surgeon's 3 1½ Wash sink 2 (circular or multiple), each set of faucets 2 1½ Urinals: Urinal, pedestal, siphon jet, blowout 8 2 Urinal stall 3 2 Urinal, wall integral trap 3 2 Urinal, wall P trap, exposed 2 1½ Water closets: Tank operated 4 3 Valve-operated 8 3 1 A shower head over a bathtub does not increase the fixture value. 2 See Appendix A:  Table F and Section 890.1330(b) for method of determining unit values of fixtures not listed in this Table or for rating of devices with intermittent flows.