The Chicago Plumbing Code

§ 18-29-405

Installation of Fixtures.

§ 18-29-405.1 Water supply protection.

The supply lines and fittings for every plumbing fixture shall be installed so as to prevent backflow.

§ 18-29-405.2 Access for cleaning.

Plumbing fixtures shall be installed so as to afford easy access for cleaning both the fixture and the area around the fixture. All traps not integral with the fixtures shall be accessible for cleaning. When a P trap is used on a bath waste it shall be directly below the tub overflow. The overflow shall be fastened to the tub by means other than the face plate. Face plates shall be clearly marked clean out.

§ 18-29-405.2.1 Toilet room construction.

Rooms or spaces containing water closets, urinals, bathtubs, or showers shall have floors of nonabsorbent materials and shall be entirely separated from other rooms by solid partitions extending from floor to ceiling without openings, except as required for access or mechanical ventilation.

§ 18-29-405.2.2 Day care centers.

The requirement for floor-to-ceiling partitions shall not apply to day care centers where supervised boys' and girls' toilets are provided exclusively for children under six years of age. Such supervised children's toilet areas adjacent to and serving one or more classrooms shall be grouped into boys toilets and girls' toilets. Boys' and girls' toilets shall be separated from the other and from the classrooms by modesty panels at least 4 feet (1220 mm) high and shall utilize special children's water closets. Lavatories shall be located in a common vestibule serving separate boys' and girls' toilets.

§ 18-29-405.3 Setting.

Fixtures shall be set level and in proper alignment with reference to adjacent walls.

§ 18-29-405.3.1 Water closets, lavatories and bidets.

A water closet, lavatory or bidet shall not be set closer than 15 inches (380 mm) from its center to any side wall, partition, vanity or other obstruction, or closer than 30 inches (760 mm) center-to-center between toilets or adjacent fixtures. There shall be at least 18 inches (457 mm) clearance in front of the water closet or bidet to any wall, fixture or door. Water closet compartments shall not be less than 30 inches (760 mm) wide and 60 inches (1525 mm) deep. There shall be at least 8 inches (457 mm) clearance in front of a lavatory to any wall, fixture or door (see Figure § 18-29-405.3.1).

§ 18-29-405.3.2 Urinals.

A urinal shall not be set closer than 15 inches (381 mm) from the center of the urinal to any side wall, partition, vanity or other obstruction, or closer than 30 inches (760 mm) center-to-center between urinals (see Figure § 18-29-405.3.1).

Figure § 18-29-405.3.1
Fixture Clearances

For SI: 1 inch = 25.4 mm

§ 18-29-405.4 Floor and wall drainage connections.

Connections between the drain and floor outlet plumbing fixtures shall be made with a floor flange. The flange shall be attached to the drain and anchored to the structure. Connections between the drain and wall-hung water closets shall be made with an approved extension nipple or horn adapter. The water closet shall be bolted to the hanger with corrosion-resistant bolts or screws. Joints shall be sealed with an approved elastomeric gasket or setting compound conforming to FS TT- P-1536a.

§ 18-29-405.4.1 Floor flanges.

Floor flanges for water closets or similar fixtures shall be not less than 1/8 inch (3 mm) thick for brass, 1/4 inch (6 mm) thick for plastic, and 1/4 inch (6 mm) thick and not less than a 2-inch (50 mm) caulking depth for cast-iron or galvanized malleable iron.

§ 18-29-405.4.1.1 Hard lead floor flanges.

Floor flanges of hard lead shall weigh not less than 1 pound 9 ounces (0.7 kg) and shall be composed of lead alloy with not less than 7.75 percent antimony by weight. Closet screws and bolts shall be of brass. Flanges shall be secured to the building structure with corrosion-resistant screws or bolts.

§ 18-29-405.4.2 Securing floor outlet fixtures.

Floor outlet fixtures shall be secured to the floor or floor flanges by screws or bolts of corrosion-resistant material.

§ 18-29-405.4.3� Securing wall-hung water closet bowls.

Wall-hung water closet bowls shall be supported by a concealed metal carrier that is attached to the building structural members so that strain is not transmitted to the closet connector or any other part of the plumbing system. The carrier shall conform to ASME A112.6.1.

§ 18-29-405.5 Water-tight joints.

Joints formed where fixtures come in contact with walls or floors shall be sealed with permanent caulk or other approved material.

§ 18-29-405.6� Plumbing in mental health centers.

In mental health centers, pipes or traps shall not be exposed, and fixtures shall be bolted through walls.

§ 18-29-405.7 Design of overflows.

Where any fixture is provided with an overflow, the waste shall be designed and installed so that standing water in the fixture will not rise in the overflow when the stopper is closed, and no water will remain in the overflow when the fixture is empty.

§ 18-29-405.7.1 Connection of overflows.

The overflow from any fixture shall discharge into the drainage system on the inlet or fixture side of the trap.

Exception: The overflow from a flush tank serving a water closet or urinal shall discharge into the fixture served.

§ 18-29-405.8 Access to concealed connections.

Fixtures with concealed slip joint connections shall be provided with an access panel or utility space at least 12 inches (300 mm) in its smallest dimension or other approved arrangement so as to provide access to the slip connections for inspection and repair. Where such access cannot be provided, access doors shall not be required provided that all joints are soldered, solvent cemented or screwed so as to form a solid connection.