Kohler K-2972 Montageanleitung

Installation and Care Guide

Thermostatic Mixing Valve

Mproduct numbers are for Mexico (i.e. K-12345M)

Los números de productos seguidos de

Mcorresponden a México (Ej.

K-12345M)

Français, page “Français-1”

Español, página “Español-1”

K-2972, K-2975 K-2973, K-2976

1205551-2-C

IMPORTANT INSTRUCTIONS

READ AND SAVE FOR THE

CONSUMER

WARNING: Risk of scalding or other severe injury.

CAUTION: Risk of scalding hazard. This device has been

calibrated at the factory to ensure a safe maximum water

temperature. Any variance in settings or water inlet

conditions from those used during factory calibration may

raise the discharge temperature above the safe limit, and may

present a scalding hazard.

•Before completing installation, the installer must set the

maximum water temperature setting of this valve to minimize the

risks associated with scalding hazards according to ASTM F 444.

The installer is responsible for adjusting the maximum water

temperature of this valve according to instructions.

This valve meets or exceeds ASME A112.18.1/CSA B125.1 and ASSE

1016/ASME A112.18.1016/CSA B125.16.

If you do not understand any of the temperature adjustment

instructions in this document, in the United States please contact our

Customer Care Center at 1-800-4KOHLER. Outside the U.S., please

contact your distributor.

IMPORTANT NOTICE: Please ﬁll in the blanks on the valve label and

below, in the NOTICE TO HOMEOWNERS box. Retain this guide for

future reference.

•The valve is calibrated to 104°F (40°C) at the ﬁrst stop position,

and the maximum temperature limit stop is positioned so the

outlet water temperature does not exceed 120°F (49°C).

•Factory calibrated inlet conditions are:

Hot and cold water pressure = 43.5 psi (300 kPa)

Hot water supply temperature = 149°F (65°C)

Cold water supply temperature = 59°F (15°C)

•If inlet conditions differ from those used during factory

calibration, it may be necessary to re-calibrate the valve after

installation. The installer must check the mixed ﬂow

temperature after installation, and adjust the valve as needed

according to the instructions.

1205551-2-C 2 Kohler Co.

IMPORTANT INSTRUCTIONS (cont.)

NOTICE TO HOMEOWNERS! This device has been preset by

_______________________ of _______________________________ to

ensure a safe maximum temperature. Any change in the setting may

raise the discharge temperature above the limit considered safe, and

lead to scalds.

Date: ______________

Tools and Materials

Before You Begin

WARNING: Risk of scalding. High water temperature can

cause severe burns. Set the water temperature at or below

120°F (49°C) following the adjustment procedure.

WARNING: Risk of scalding or other severe injury. Before

completing installation, the installer must set the maximum

water temperature setting of this valve to minimize the risks

associated with scalding hazards according to ASTM F 444.

CAUTION: Risk of personal injury. If the water

temperature is set too high, scalding will occur. The water

temperature should never be set above 120°F (49°C).

CAUTION: Risk of scalding. This device has been calibrated

at the factory to ensure a safe maximum water temperature.

Any variance in settings or water inlet conditions from those

used during factory calibration may raise the discharge

Thermometer

Solder

Hacksaw or

Tubing Cutter

10 mm

Hex Wrench

Propane

Torch

Adjustable

Wrench

Thread

Sealant

Assorted

Screwdrivers

Strap Wrench

Wrench and

1/2" (13 mm)

Hex Socket

Pipe

Wrench

Kohler Co. 3 1205551-2-C

Before You Begin (cont.)

temperature above the safe limit, and may present a scalding

hazard. Responsibility for installation and adjustment of this

device in accordance with these instructions lies with the

installer.

NOTICE: Risk of product damage. This valve contains plastic and

rubber components. Do not sweat or braze directly to the valve

body. Do not apply excessive heat to the valve body when you

make solder connections. Do not apply ﬂux or acids directly to the

valve, as damage to the seals, plastic components, and trim ﬁnish

may result.

NOTICE: Risk of product damage. Do not apply petroleum-based

lubricants to the valve components, as damage may result.

NOTICE: Risk of product damage. Inlet and outlet threaded joint

connections should be made with plumbers PTFE tape or liquid

sealant. Oil-based, non-setting compounds should not be used.

NOTICE: Do not force the handle in any direction. Forcing the

handle will damage the valve.

Observe all local plumbing and building codes.

Shut off the water supply.

Inspect the supply piping for damage. Replace as necessary.

The bottom port of the thermostatic mixing valve is intended for

use as a bath ﬁller only. If a bath spout is not used with this

product, cap the bottom port.

The K-2972 and K-2975 thermostatic mixing valves do not contain

an integral volume control/shut-off valve. You must install a

separate volume control/shut-off valve (K-2974 or K-2977)

downstream of any used valve outlet.

The K-2973 and K-2976 thermostatic mixing valves contain a

single volume control/shut-off valve for controlling the water

ﬂow through the shower outlet. When plumbing to the valve’s

bath outlet, you must install a separate volume control shut-off

valve (K-2974 or K-2977) downstream from the bath outlet.

1205551-2-C 4 Kohler Co.

Before You Begin (cont.)

The thermostatic mixing valves do not have an integral aspirator.

For installations that use a bath diverter spout, you must install a

twin ell (K-9663) with integral aspirator between the valve and

the bath spout. If these thermostatic mixing valves are installed

without an aspirator, it will cause water to ﬂow from the shower

and bath spout at the same time.

Determine the correct drain size and capacity for your

installation. If two thermostatic mixing valves are used together,

water volumes between 18 and 30 gal/min (60 and 114 l/min) or

more are possible, depending upon the water supply pressure.

Determine the correct water heater size and capacity for your

installation. A typical shower installation uses an approximate

mix of 75% hot water and 25% cold. A custom shower application

using three 2.5 gal/min (9.5 l/min) showerheads can use about 45

gallons (170 liters) of hot water in 8 minutes. Choose a water

heater large enough for your installation.

The valve is calibrated to 104°F (40°C) at the ﬁrst stop position.

The maximum temperature limit stop is positioned so the outlet

water temperature does not exceed 120°F (49°C).

The factory calibrated pressure for hot and cold water inlets is

43.5 psi (300 kPa). The factory calibrated hot water supply

temperature is 149°F (65°C) and the cold water supply

temperature is 59°F (15°C).

If the inlet conditions differ from those used during factory

calibration, it may be necessary to re-calibrate the valve after

installation. The installer must check the mixed ﬂow

temperature after installation and adjust the valve as needed

according to the instructions.

If possible, ﬂush all piping thoroughly before installing the valves

to prevent early clogging of ﬁlter screens.

Kohler Co. 5 1205551-2-C

K-2972 - 1/2″Valve Roughing-In

1/2" NPT

Shower Outlet

1/2" NPT

Hot Inlet

1-1/8"

(29 mm)

1-7/16"

(37 mm)

2-1/16"

(52 mm) 3-7/8"

(98 mm)

3-3/4" (95 mm)

2-7/16"

(62 mm)

Min

Finished Wall

Max

Finished Wall

1-3/16" (30 mm) 4-5/8" (117 mm)

1/2"

(13 mm)

1/2" NPT

Cold Inlet

Stop

2-5/16"

(59 mm)

4-5/8" (117 mm)

3-1/2" (89 mm)

2-1/16"

(52 mm)

1205551-2-C 6 Kohler Co.

K-2973 - 1/2″Valve Roughing-In

Min

Finished Wall

Max

Finished Wall

2-7/16"

(62 mm) 3-3/4" (95 mm)

3-1/2" (89 mm)

1/2"

(13 mm)

4-5/8" (117 mm)

1-3/16" (30 mm)

6-3/8"

(162 mm) 3-1/8"

(79 mm) 1-7/16"

(37 mm)

1/2" NPT

Cold Inlet

1/2" NPT

Hot Inlet

1/2" NPT

Shower Outlet

Stop

1-3/16" (30 mm)

2-5/16"

(59 mm)

2-1/16"

(52 mm)

Kohler Co. 7 1205551-2-C

K-2975 - 3/4″Valve Roughing-In

1/2"

(13 mm)

3-1/2" (89 mm)

4-5/8" (117 mm)

1-3/16" (30 mm)

Max

Finished Wall

Min

Finished Wall

2-7/16"

(62 mm)

3-3/4" (95 mm)

3/4" NPT

Bath Outlet Stop

3/4" NPT

Cold Inlet

4-7/16"

(113 mm)

2-1/16"

(52 mm) 1-7/16"

(37 mm)

1-1/8"

(29 mm)

3/4" NPT

Hot Inlet

3/4" NPT

Shower Outlet 2-1/16"

(52 mm)

2-3/8" (60 mm)

4-13/16" (122 mm)

1205551-2-C 8 Kohler Co.

K-2976 - 3/4″Valve Roughing-In

1-3/16" (30 mm) 4-5/8" (117 mm)

1/2"

(13 mm)

3-1/2" (89 mm)

3-3/4" (95 mm)

2-7/16" (62 mm)

Min

Finished Wall

Max

Finished Wall

2-3/8"

(60 mm)

1-3/4"

(44 mm) Stop

3/4" NPT

Shower Outlet

3/4" NPT

Hot Inlet

3/4" NPT

Cold Inlet

3/4" NPT

Bath Outlet

1-7/16"

(37 mm)

3-3/16"

(81 mm)

6-15/16"

(176 mm)

2-1/16"

(52 mm)

4-13/16" (122 mm)

Kohler Co. 9 1205551-2-C

1. Install the Support Framing

IMPORTANT! Make sure the valve is mounted at the correct depth

so it will be properly positioned when the ﬁnished wall is installed.

NOTE: Shower only conﬁguration is shown. Adjust the support as

needed for other conﬁgurations.

NOTE: Install a backer board behind the valve for installations on

2x6 studding only.

NOTE: A backer board may not ﬁt behind the valve for installations

on 2x4 studding. Support the pipes directly above and/or below the

valve. This will also provide support for the valve.

NOTE: When installing the K-2972 or K-2973 valve, use 1/2″

nominal copper tubing and ﬁttings throughout this installation.

Smaller diameter piping upstream or downstream of the valve will

reduce performance of the valve.

2x4

4-1/4" (108 mm) Max2-15/16" (75 mm) Min

Plaster Guard

Thick WallThin Wall

2x6

Finished

Wall Finished Wall

2-7/16"

(62 mm)

3-3/4" (95 mm)

1205551-2-C 10 Kohler Co.

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