815 KAR 20:080. Waste pipe size.

 

      RELATES TO: KRS Chapter 318

      STATUTORY AUTHORITY: KRS 318.130

      NECESSITY, FUNCTION, AND CONFORMITY: The office is directed by KRS 318.130 through the State Plumbing Code Committee to adopt and put into effect a State Plumbing Code. This administrative regulation relates to the sizes of waste piping that are needed to serve various types of plumbing fixtures and appurtenances.

 

      Section 1. The minimum size (nominal inside diameter) of traps, soil or waste branches for a given fixture shall not be less than that given in the following table:

 

Minimum Size (in inches)

Trap

Branch

Fixture Unit

Automatic clothes washer

2

2

2

Basement floor drain

3

3

3

Bath: sitz

1 1/2

1 1/2

2

Bathtub

1 1/2

1 1/2

1 1/2

Combination fixture

2

2

2

Dental cuspidor

2

2

2

Dishwashers

1 1/2 up

1 1/2 up

1 1/2 up

Disposal Unit

1 1/2

1 1/2

1 1/2

Drinking Fountain

1 1/4

1 1/4

1

Floor drain in toilet room

3

3

3

Floor drain in utility room

3

3

3

Industrial floor drain

4

4

4

Kitchen sink unit

1 1/2 up

1 1/2 up

1 1/2 up

Laundry tray

1 1/2

1 1/2

1 1/2

Lavatories

1 1/4

1 1/4

1

Santistand

3

4

6

Shower Stall

1 1/2

1 1/2

1 1/2

Sinks: bar or soda fountain

1 1/2

1 1/2

1 1/2

Sinks: Barium

2

2

2

Sinks: Chemical

1 1/2 up

1 1/2 up

1 1/2 up

Sink: Clinic

3

4

6

Sinks: Kitchen, residence

1 1/2

1 1/2

1 1/2

Sink: Plaster

2

2

2

Sink: Service

3

3

3

Sink: Service wall type

2

2

2

Sink: three compartment

2

2

2

Urinal: lip

1 1/2

1 1/2

1 1/2

Urinal: pedestal

3

3

3

Urinal: stall

2 up

2 up

2 up

Urinal: trough

1 1/2

1 1/2

1 1/2

Water closet

3

3 or 4

6

                (Recodified from 401 KAR 1:050, 7-5-78; Am. 9 Ky.R. 47; eff. 8-11-82; TAm eff. 8-9-2007.)