2.3 Urinals, Floor Drains, Floor Sinks, Sinks, Dishwashers, Disposers, & Special Fixtures (UPC 412–421)

Urinals (UPC 405.2, 412, 413.2)

• Prohibited urinals (405.2): Trough urinals and urinals with an invisible seal are prohibited.
• Standards and water use (412.1, WA 2015 amendment): Urinals comply with ASME A112.19.2/CSA B45.1, ASME A112.19.19, or CSA B45.5/IAPMO Z124. The average water use may not exceed 1 gallon per flush, and continuous-flow urinals are prohibited.
• Clearances (402.5): At least 12 inches from the centerline to a side wall or partition and 24 inches center to center.
• Backflow (412.2): The water supply needs an approved vacuum breaker or other approved device under 603.5. A flushometer atmospheric vacuum breaker's critical level must be at least 6 inches above the highest part of the urinal (603.5.1).
• Flushometers (413.2): A manually controlled flushometer valve may not flush more than one urinal.
• Water supply sizing: Table 610.3 lists a 3/4-inch minimum branch for a flushometer-valve urinal and 1/2 inch for a flush-tank urinal.

Nonwater urinals (412.1.1)

1. A barrier liquid sealant maintains the trap seal.
2. The urinal must permit uninhibited flow to the drainage system and be maintained per the manufacturer's instructions.
3. At least one water-supplied fixture rated at least 1 WSFU must be installed upstream on the same drain line to rinse the drain.
4. A water distribution rough-in must be provided to the urinal location, so a backflow-protected flushing valve can be added later.

Floor Drains (UPC 418) and Floor Sinks (421)

• 418.2: A floor drain is a plumbing fixture. It needs an approved strainer whose waterway equals the area of the tailpiece and a watertight joint with the floor.
• 418.3 Location (Washington amendment): Floor drains are required in:
  1. Toilet rooms containing two or more water closets, or one water closet and one urinal, except in a dwelling unit. The floor must slope toward the drain.
  2. Laundry rooms in commercial buildings and common laundry facilities in multifamily buildings.
• 418.4 Food storage: Drains in storerooms, walk-in coolers and freezers, or refrigerated equipment must have indirect waste piping. Each area gets its own waste pipe with an indirect connection. Traps must be located where the seal will not freeze. Otherwise, slope the freezer floor to a floor drain outside the storage compartment.
• 418.5: Floors slope to floor drains.
• 421.2: A floor sink's waste outlet needs a removable, accessible strainer or grate.
• 1007.1: Floor drain traps subject to infrequent use need trap seal protection (see Section 9.3).

Sinks (UPC 420)

Dishwashers and Food Waste Disposers (UPC 414, 419)

• 414.3 (Washington amendment): A domestic dishwasher discharges indirectly through an air gap fitting (807.3). It may discharge into a waste receptor, a wye branch fitting on the kitchen sink tailpiece, or the dishwasher connection of a food waste disposer. Commercial dishwashing machines discharge indirectly through an air gap.
• 414.2: The water supply to a commercial dishwasher is protected by an air gap, an AVB, PVB, or SVB, or an ASSE 1004 device.
• 419.2: Use wye or other directional branch fittings in continuous wastes that receive disposer discharge. A dishwasher drain may not connect to a sink tailpiece, continuous waste, or trap on the discharge side of a disposer.
• 419.3: Disposers need a cold water supply protected by an air gap or backflow device.

Drinking Fountains, Eyewash, and Special Fixtures

• Drinking fountains (415): Self-closing units that comply with NSF 61 (415.1). They may discharge directly or through an air break (415.3) and may not be installed in toilet rooms (415.4). Washington does not adopt 415.2, drinking fountain alternatives. Bottle-filler substitutions and fountain counts come from Building Code Chapter 29 (Section 2.4).
• Emergency eyewash and showers (416): These comply with ISEA Z358.1, are not limited in flow rate, and must be on the same level as the hazard with an unobstructed, signed path. A drain is not required. If one is provided, its discharge must meet the chemical waste rules in 811.
• Special fixtures (406.1): Baptisteries, ornamental ponds, aquaria, and fountains need AHJ approval before installation.
• Prohibited fixtures (405.3): No fixed wooden or tile wash trays or sinks for domestic use in dwellings. No sheet-metal-lined wooden bathtubs. No dry or chemical toilets in a dwelling without Health Officer approval.

Faucets and Fixture Fittings (UPC 417)

• 417.1: Faucets comply with ASME A112.18.1/CSA B125.1, and those under NSF 61's scope must meet it.
• 417.3 and 417.4: Handheld showers and pull-out spouts need integral backflow protection or a separate device such as ASME A112.18.3 or ASSE 1014.
• 417.5 Hot on the left: With two handles, the left-hand control controls hot water when facing the outlet. Single-handle shower valves must match their markings.