815 KAR 20:070. Plumbing fixtures.
TO: KRS 318.010, 318.015, 318.150, 318.200
AUTHORITY: KRS 318.130
FUNCTION, AND CONFORMITY: KRS 318.130 requires the department, after review by
the State Plumbing Code Committee, to promulgate an administrative regulation
establishing the Kentucky State Plumbing Code regulating plumbing, including
the kind, type, and quality of plumbing fixtures to be used in the construction
of plumbing systems. This administrative regulation establishes the
requirements for plumbing fixtures allowed in Kentucky.
1. Materials. Receptacles used as water closets, urinals, or for the disposal
of human excreta, shall be of vitrified earthenware, hard natural stone, or
cast-iron with a light color porcelain enameled on the inside, except as established
in Section 4 of this administrative regulation.
2. Installation. Plumbing fixtures shall be installed to allow access for
All pipes from fixtures shall be run to the wall.
A trap or pipe shall not extend nearer to the floor than twelve (12) inches
except laundry trays or similar fixtures.
3. Water Closet Bowls. (1) A water closet bowl shall be of one (1) piece
construction and hold a sufficient quantity of water when filled to the trap
overflow to prevent fouling of its interior surfaces.
A water closet bowl shall be provided with an integral flushing rim to flush
the entire interior of the bowl.
4. Plastic Water Closet Bowl and Tank. (1) A plastic water closet bowl and tank
shall be constructed with a polypropylene lining inside the one (1) piece bowl
The outer surface of the bowl shall be constructed of PVC material.
The filler material between the lining and outer surface shall be made of
The bowl shall have:
A three (3) inch water seal; and
A two and one-eighth (2 1/8) inch waste opening passage.
5. Frost-proof Closet. (1) A frost-proof water closet may be installed only in
a building that has at least a twelve (12) inch air break between it and any
building used for habitation or occupancy.
The room shall be tightly enclosed and accessible from the outside only.
The soil pipe between the trap and hopper shall be of extra heavy cast-iron,
four (4) inches in diameter and shall be light colored porcelain enamel on the
The building shall have a nonabsorbent floor.
A frost-proof water closet shall have a four (4) inch vent.
6. Floor and Shower Drains. (1) A floor drain or a shower drain shall be
considered a plumbing fixture and shall be provided with a strainer.
Shower drain pan construction.
A shower pan shall be constructed without a seam and shall extend to a minimum
height of six (6) inches on all vertical walls.
A shower pan shall not be required on a concrete floor before the outside grade
A shower drain pan shall be constructed of:
Sheet lead weighing not less than four (4) pounds per square foot;
Nonplasticized chlorinated polyethylene produced and labeled as ASTM D-412 and
D-1204, which shall be not less than 0.040 inches thick;
Nonplasticized polyvinyl chloride (PVC) sheet material produced and labeled as
ASTM D-1004, D-412, 06A, and D-1790, which shall be not less than 0.040 inches
Other approved material as established in 815 KAR 20:020, Section 5. Copies of
ASTM specifications identified in this administrative regulation may be
obtained by writing the American Society for Testing Materials, 1916 Race
Street, Philadelphia, Pennsylvania 19103.
Fiberglass bathtubs, showers, tub enclosures, and shower stalls.
Fiberglass bathtubs and tub enclosures shall be produced and labeled as ANSI Z
Acrylic-faced bathtubs shall be produced and labeled as ASTM E8408A or E 162.
Fiberglass shower stalls and shower receptors shall be produced and labeled as
ANSI Z 124.2.
Metamorphosed carbonate aggregate polyester resinous martrix-marbleoid
bathtubs, lavatories, and shower stalls.
Metamorphosed carbonate aggregate polyester resinous martrix-marbleoid bathtubs
shall be produced and labeled as ANSI Z 124-1.
Lavatories shall be produced and labeled as ANSI Z 124-3.
Shower stalls shall be produced and labeled as ANSI Z 124-2.
Copies of ANSI specifications identified in this administrative regulation may
be obtained by writing the American National Standards Institute, 1430
Broadway, New York, New York 10018.
7. Fixture Strainers. (1) A fixture, other than a water closet or a pedestal
urinal, shall be provided with a strainer.
The outlet area of the strainer shall not be less than the interior area of the
8. Fixture Overflow. The overflow from a fixture shall be optional, but if
used, the overflow shall be connected to the inlet side of a trap and
accessible for cleaning.
9. Fixture Additions. A fixture added to a plumbing system shall be installed
to comply with all applicable sections of the State Plumbing Code.
10. Defective Fixtures. If a newly installed fixture is found to be defective
or if an old fixture is found to be in an unusable condition, it shall be
repaired, replaced, or removed within thirty (30) days upon written notice from
11. Water Heaters. (1) A water heater shall be properly connected to the hot
and cold water supply.
A water heater designed for use as an appliance for supplying potable hot water
for domestic or commercial purposes may be used for space heating if the water
temperature does not exceed 140 degrees Fahrenheit.
Every water heater shall be accessible for inspection, repair, and replacement.
If a water heater is installed in a crawl space after September 1, 2006, it
shall have adequate access with a travel path no less than five (5) feet of
vertical distance and be installed on at least a two (2) inch thick
noncorrosive material adequate to support the heater.
The replacement of a water heater that was originally installed in a crawl
space prior to September 1, 2006 shall not require compliance with the vertical
distance requirement of this subsection.
If a water heater is located in an attic of a residence, a water tight pan of
corrosion resistant material shall be installed beneath the water heater and
shall be equipped with at least a three-quarter (3/4) inch drain to be piped
similarly to a pressure and temperature relief valve discharge line.
A fuel-fired water heater shall be connected to a flue or chimney of a size that
shall be at least as large as the size required by the water heater
A fuel-fired water heater vent shall not be connected to a flue serving a
The flue or chimney shall extend two (2) feet above the roof and shall be
properly flashed and shall not terminate within six (6) feet of a door or
A fuel-fired water heater, with the exception of those having direct-vent or
through the wall vent systems, shall not be placed in any bathroom, toilet room,
or a room used for sleeping.
If a fuel-fired water heater is placed in a closed room or closet, the door
shall be a louver door or shall be properly ventilated to provide combustion
air and circulation in accordance with the Fuel Gas Code incorporated by
reference in Chapter 35 of the Kentucky Building Code filed in 815 KAR 7:120.
Direct venting system location.
A residential gas-fired direct vent and through the wall type water heater
shall be vented in accordance with the manufacturer's recommendations and shall
be installed in accordance with the Fuel Gas Code incorporated by reference in
the Kentucky Building Code filed in 815 KAR 7:120.
The vent terminal of a direct vent appliance with an input of 50,000 BTU per
hour or less shall be located at least nine (9) inches from any opening through
which flue gases could enter a building.
An appliance with an input over 50,000 BTU per hour shall require a twelve (12)
inch vent termination clearance.
The bottom of the vent terminal and the air intake shall be located at least
twelve (12) inches above grade.
An instantaneous water heater not listed in 815 KAR 20:020 shall:
1. Be certified to ANSI Z21.10.1 for units including but not exceeding 75,000
Be certified to ANSI Z21.10.3 for units exceeding 75,000 BTUs;
Have a minimum of 3/4 inch inlet and outlet;
Be installed with a properly sized pressure relief valve not exceeding 150
pounds per square inch; and
If required by the manufacturer to be periodically flushed, be installed to
flush without altering the installation.
Temperature and pressure relief valves shall be installed in accordance to
12. Conservation of Water. (1) Conservation of hot water.
Showers. A shower used for other than safety reasons shall be equipped with an
approved flow control device, which shall limit the total flow to a maximum of
two and one-half (2.5) gallons per minute per shower head.
Lavatories in restrooms of public facilities shall be equipped with an outlet
device, which shall limit the flow of domestic hot water to a maximum of 0.75
gallons per minute.
Lavatory faucets (other than those in restrooms of public facilities) shall be
equipped with a flow control device, which shall limit the flow of domestic hot
water to a maximum of two (2.0) gallons per minute.
Sink faucets shall be equipped with a flow control device, which shall limit
the flow of domestic hot water to a maximum of two and one-half (2.5) gallons
Conservation of cold water.
Showers. A shower used for other than safety reasons shall be equipped with an
approved control device to limit the total flow to a maximum of two and
one-half (2.5) gallons per minute per shower head.
Lavatory and sink faucets.
Lavatory faucets. Lavatory faucets shall be equipped with a flow control device,
which shall limit the flow of the domestic cold water to a maximum of two (2.0)
gallons per minute.
Sink faucets. Sink faucets shall be equipped with a flow control device, which
shall limit the flow of domestic cold water to a maximum of two and one-half
(2.5) gallons per minute.
Water closets. A water closet shall not be installed in a facility or building
unless it is of a type designed and manufactured to limit the gallons per flush
as required by this subsection.
Residential (private use) installations. A water closet for private use in a
single family dwelling, duplex, or townhouse, condominium or apartment unit
shall not exceed one and six-tenths (1.6) gallons per flush.
Commercial (public use) installations. A water closet for public use, including
a commercial building, shall not exceed three and one-half (3.5) gallons per
Urinals. A urinal shall not exceed one (1.0) gallon per flush.
The provisions of this section shall apply to new construction, renovation, or
replacement in an existing structure.
Upon compliance with the requirements of this section, the Division of Plumbing
shall permit the installation of a tank type water closet equipped with devices
found by the inspector to meet applicable specifications in water closets
having a tank capacity in excess of three and one-half (3 1/2) gallons
(thirteen and three-tenths (13.3) liters).
The Division of Plumbing shall allow the use of a standard flush water closet
and a urinal that does not meet the specific specifications if the configuration
of the building drainage system requires a greater quantity of water to adequately
flush the system, or if the owner requests the use of antique fixtures that
would not be equipped for reduced flow. (Recodified from 401 KAR 1:040, 7-5-1978;
Am. 8 Ky.R. 361; 769; eff. 1-6-1982; 9 Ky.R. 46; eff. 8-11-1982; 833; eff. 2-2-1983;
1237; eff. 6-1-1983; 10 Ky.R. 453; eff. 11-2-83; 11 Ky.R. 73; eff. 8-7-1984; 13
Ky.R. 785; eff. 11-11-1986; 1940; eff. 6-9-1987; 16 Ky.R. 1270; eff. 1-25-1990;
19 Ky.R. 1002; 1387; eff. 12-8-1992; 20 Ky.R. 3117; eff. 7-7-1994; 21 Ky.R.
1391; eff. 1-9-1995; 2533; eff. 6-1-1995; 23 Ky.R. 3975; eff. 6-25-1997; 32
Ky.R. 2365; 33 Ky.R. 406; eff. 9-1-2006; 35 Ky.R. 2588; 36 Ky.R. 85; eff.
7-29-2009; 37 Ky.R. 2759; eff. 8-5-2011; 41 Ky.R. 169; eff. 9-24-2014.)