About this code: Because fixture design and quality are paramount to ensure that plumbing fixtures operate properly, Chapter 27 specifies numerous product and material standards for plumbing fixtures. Regulations for locating plumbing fixtures and constructing field-built shower receptors are provided.
Code development reminder: Code change proposals to this chapter will be considered by the IRC—Mechanical/Plumbing Code Development Committee during the 2021 (Group A) Code Development Cycle.
|Air gap fittings for use with plumbing fixtures, appliances and appurtenances||ASME A112.1.3|
|Bathtub/whirlpool pressure-sealed doors||ASME A112.19.15|
|Diverters for faucets with hose spray, anti-syphon type, residential application||ASME A112.18.1/CSA B125.1|
|Enameled cast-iron plumbing fixtures||ASME A112.19.1/CSA B45.2|
|Floor drains||ASME A112.6.3|
|Framing-affixed supports for off-the-floor water closets with concealed tanks||ASME A112.6.2|
|Hose connection vacuum breaker||ASSE 1052|
|Hot water dispensers, household storage type, electrical||ASSE 1023|
|Household disposers||ASSE 1008|
|Hydraulic performance for water closets and urinals||ASME A112.19.2/CSA B45.1|
|Individual automatic compensating valves for individual fixture fittings||ASME A112.18.1/CSA B125.1|
|Individual shower control valves anti-scald||ASSE 1016/ASME A112.1016/CSA B125.16|
|Macerating toilet systems and related components||ASME A112.3.4/CSA B45.9|
|Nonvitreous ceramic plumbing fixtures||ASME A112.19.2/CSA B45.1|
|Plastic bathtub units||CSA B45.5/IAPMO Z124; ASME A112.19.2/CSA B45.1|
|Plastic lavatories||CSA B45.5/IAPMO Z124|
|Plastic shower receptors and shower stalls||CSA B45.5/IAPMO Z124|
|Plastic sinks||CSA B45.5/IAPMO Z124|
|Plastic water closet bowls and tanks||CSA B45.5/IAPMO Z124|
|Plumbing fixture fittings||ASME A112.18.1/CSA B125.1|
|Plumbing fixture waste fittings||ASME A112.18.2/CSA B125.2; ASTM F409|
|Porcelain-enameled formed steel plumbing fixtures||ASME A112.19.1/CSA B45.2|
|Pressurized flushing devices for plumbing fixtures||ASSE 1016/ASME 112.1016/CSA B125.16; CSA B125.3|
|Specification for copper sheet and strip for building construction||ASTM B370|
|Stainless steel plumbing fixtures||ASME A112.19.3/CSA B45.4|
|Suction fittings for use in whirlpool bathtub appliances||ASME A112.19.7/CSA B45.10|
|Temperature-actuated, flow reduction valves to individual fixture fittings||ASSE 1062|
|Thermoplastic accessible and replaceable plastic tube and tubular fittings||ASTM F409|
|Trench drains||ASME A112.6.3|
|Trim for water closet bowls, tanks and urinals||ASME A112.19.5/CSA B45.15|
|Vacuum breaker wall hydrant-frost-resistant, automatic-draining type||ASSE 1019|
|Vitreous china plumbing fixtures||ASME A112.19.2/CSA B45.1|
|Wall-mounted and pedestal-mounted, adjustable and pivoting lavatory and sink carrier systems||ASME A112.19.12|
|Water closet flush tank fill valves||ASSE 1002/ASME A112.1002/CSA B125.12; CSA B125.3|
|Whirlpool bathtub appliances||ASME A112.19.7/CSA B45.10|
The installation of fixtures shall conform to the following:
Shower compartments shall have not less than 900 square inches (0.6 m2) of interior cross-sectional area. Shower compartments shall be not less than 30 inches (762 mm) in minimum dimension measured from the finished interior dimension of the shower compartment, exclusive of fixture valves, shower heads, soap dishes, and safety grab bars or rails. The minimum required area and dimension shall be measured from the finished interior dimension at a height equal to the top of the threshold and at a point tangent to its centerline and shall be continued to a height of not less than 70 inches (1778 mm) above the shower drain outlet. Hinged shower doors shall open outward. The wall area above built-in tubs having installed shower heads and in shower compartments shall be constructed in accordance with Section R702.4. Such walls shall form a watertight joint with each other and with either the tub, receptor or shower floor.
The lining material shall extend not less than 2 inches (51 mm) beyond or around the rough jambs and not less than 2 inches (51 mm) above finished thresholds. Sheet-applied load bearing, bonded waterproof membranes shall be applied in accordance with the manufacturer's instructions.
Bathtubs and whirlpool bathtub valves shall have or be supplied by a water-temperature-limiting device that conforms to ASSE 1070/ASME A112.1070/CSA B125.70, except where such valves are combination tub/shower valves in accordance with Section P2708.4. The water-temperature-limiting device required by this section shall be equipped with a means to limit the maximum setting of the device to 120°F (49°C), and, where adjustable, shall be field adjusted in accordance with the manufacturer's instructions to provide hot water at a temperature not to exceed 120°F (49°C). Access shall be provided to water-temperature-limiting devices that conform to ASSE 10705/ASME A112.1070/CSA B125.70.
Exception: Access is not required for nonadjustable water-temperature-limiting devices that conform to ASSE 1070/ASME A112.1070/CSA B125.70 and are integral with a fixture fitting, provided that the fixture fitting itself can be accessed for replacement.
Fixture fittings supplied with both hot and cold water shall be installed and adjusted so that the left-hand side of the water temperature control represents the flow of hot water when facing the outlet.
Exception: Shower and tub/shower mixing valves conforming to ASSE 1016/ASME 112.1016/CSA B125.16, where the water temperature control corresponds to the markings on the device.