Installation and Care Guide
Single-Handle Bath and Shower Valves
K-304
M product numbers are for Mexico (i.e. K-12345M) Los números de productos seguidos de
M corresponden a México (Ej. K-12345M)
Français, page “Français-1” Español, página “Español-1”
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IMPORTANT INSTRUCTIONS
READ AND SAVE FOR THE
CONSUMER
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.
•Do not install a shut-off device on either outlet of this valve. The installation of any such device may create a cross-flow condition at the valve and affect the water temperature.
•Factors that change the temperature of the water supplied to the valve, such as seasonal water temperature changes, and water heater replacement or servicing, will change the maximum water temperature supplied by the valve and may create a scalding hazard. The pressure-balancing valve will not compensate for changes in the water supply temperature; adjust the maximum water temperature setting of this pressure-balancing valve when such changes occur.
•Pressure-balancing valves may not provide protection against scalding if there is a failure of other temperature-limiting devices elsewhere in the plumbing system.
NOTICE: Only apply silicone based lubricants to these valves. Do not use petroleum based lubricants. Petroleum based lubricants will harm the O-rings, seals, and plastic components.
The installer is responsible for installing the valve and adjusting the maximum water temperature of this pressure-balancing valve according to instructions.
This valve meets or exceeds ANSI A112.18.1 and ASSE 1016.
If you do not understand any of the installation or 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.
The PEX connections on the 304-PX and 304-PS are designed for use with any ASTM F 1807 compliant copper crimp rings and ASTM F 887 compliant PEX tubing. These fittings are not compatible with ASTM F 1960 cold expansion fittings with PEX reinforcing ring assemblies.
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IMPORTANT INSTRUCTIONS (cont.)
The PEX fittings on this valve have been third party certified by CSA using the following: Sioux Chief 1/2” copper crimp ring and CSA certified VANGUARD VANEX® 1/2” PEX potable tubing. Crimps were made using a Sioux Chief 1/2” crimp tool in accordance with the Sioux Chief instructions.
The PEX connections on the 304-UX and 304-US are designed for use with any ASTM F 1960 compliant cold expansion retaining rings and ASTM F 887 compliant PEX tubing. These fittings are not compatible with ASTM F 1807 copper crimp reinforcing ring and PEX tubing assemblies.
The PEX fittings on this valve have been third party certified by CSA using the following: WIRSBO AQUAPEX 1/2” potable tubing, Uponor ProPEX 1/2” cold expansion retaining rings and the Uponor ProPEX Hand Expander tool in accordance with the Uponor Instructions.
IMPORTANT NOTICE TO INSTALLERS! Please fill in the blanks in the information box below. Retain this Guide for future reference.
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
Strap Wrench |
Hacksaw or |
PEX Crimp Tool |
Solder |
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Tubing Cutter |
(Optional) |
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Hex Wrench |
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Cold |
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Expansion Tool |
Sealant Tape |
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(Optional) |
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Before You Begin
CAUTION: Risk of personal injury. The water temperature should never be set above 120°F (49°C).
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Before You Begin (cont.)
NOTICE: Use only 1/2″ (5/8″ OD) copper pipe (type L or M) between the valve and bath spout. Using other materials may cause back pressure and result in water flowing from the showerhead and bath spout at the same time.
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 main water supply.
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2x4 |
2-1/16" |
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Bracing |
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(52 mm) |
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48" (1220 mm) To Floor
Shower Only
2x4 Bracing
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2-3/4" (70 mm) |
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Thin Wall |
72" (1829 mm) – |
2-1/16" |
78" (1981 mm) |
(52 mm) |
To Floor (Typical) |
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7" (178 mm) – |
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18" (457 mm) |
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[10" (254 mm) |
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Recommended] |
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4" (102 mm) |
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2-3/4" (70 mm) – |
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3-1/2" (89 mm) |
Bath/Shower |
Thick Wall |
Roughing-In
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Stop
Assembly
1. Prepare the Valve
IMPORTANT! The internal components of the valve will only need to be removed for back-to-back installations (reversed valve only) or installations that require soldering of connections.
NOTE: Only valves with stops will include the stop assembly.
Installations Requiring Soldering
Remove the plaster guard (not shown).
Remove internal valve components as shown and set aside.
Back-to-Back Installations
Remove the plaster guard (not shown).
For the reversed valve, remove internal components as shown and set aside. The stop assembly does not need to be removed if soldering is not needed.
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Sealant |
2x4 |
Tape |
Bracing |
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Hot Supply |
Cold Supply |
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1/2" Pipe
Nipple
Cap
2. Position the Valve and Route Piping
Install Support Framing
NOTE: The position of the 2x4 bracing is dependent on the thickness of your finished wall. Refer to the ″Roughing-In″ Section.
Determine the valve location and install 2x4 bracing behind the valve plate.
Install bracing at the showerhead and bath spout installation locations.
Route Piping and Connect the Supplies
IMPORTANT! Do not use multiple elbows on the bath spout outlet. Use 1/2″ NPT threaded adapters or solder 1/2″ copper directly to the outlet.
Install 1/2″ piping and elbows to the showerhead and bath spout outlets. Use sealant tape on all threaded connections.
Secure the piping to the framing.
Connect the water supplies using 1/2” copper, CPVC, or PEX components.
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Position the Valve and Route Piping (cont.)
Solder all needed connections.
Temporarily install 1/2” pipe nipples to the elbows so they will extend at least 2” (51 mm) beyond the finished wall.
Install caps to both pipe nipples.
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Hot Supply
Reversed
Valve
Cold Supply
3. Back-To-Back Installation
NOTICE: Do not install the valve body upside down.
Route the supplies and install the valves. Refer to the roughing-in illustration for your installation.
NOTE: One valve will have reversed supply connections, hot supply to ″COLD″ inlet and cold supply to ″HOT″ inlet.
Connect the water supplies as shown. Use sealant tape on all threaded connections.
Install 2x4 bracing behind the plate (not shown).
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Tab Down
Reversed Valve Only
Stop |
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Assembly |
Tab Up |
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4. Reassemble the Valve
Slowly open the main water supply and flush the system before assembling the internal components.
Turn off the water supply.
Reinstall the stop assembly (if present) and the pressure balancing unit.
Reinstall the cap assembly with the tab oriented up.
For reversed valves in back-to-back installations: reinstall the cap assembly with the tab oriented down.
Install the collar and secure with the screws.
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Cap
Valve Stem
5. Flush the System
Remove the cap from one of the pipe nipples.
Turn the valve stem clockwise to the full open position.
Turn on the hot and cold water supplies. Check for leaks.
Turn the valve stem counterclockwise to close.
Reinstall the cap.
Repeat for the second pipe nipple.
Reinstall the cap.
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Finished
Wall
Ø 5-9/16" (141 mm)
Ø 5-9/16" (141 mm)
2-3/4" (70 mm) –
3-1/2" (89 mm)
6. Install the Finished Wall
Thick Wall
NOTE: The plaster guard can be used as a guide for marking the cutout.
Cut a 5-9/16″ (141 mm) hole in the wall material.
Install the finished wall material.
Leave the plaster guard in place at this time.
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Discard. |
1-9/16" (40 mm) |
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45˚ |
1-9/16" |
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(40 mm) |
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Wall |
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Material |
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Ø 4-1/2" |
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(114 mm) |
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Ø 4" |
Drywall |
(102 mm) |
Screws |
2-3/4" (70 mm)
7. Install the Finished Wall
Thin Wall
Twist the dome of the plaster guard to separate it from the outer ring. Discard the outer ring.
Slide the dome over the valve stem.
NOTE: The plaster guard dome can be used as a guide for marking the cutout.
Cut a 4″ (102 mm) hole in the wall material.
For Valves with Stops: Using the holes in the valve backing plate as a guide, cut openings for the stops.
Secure the wall material to the valve backing plate at the locations shown.
Leave the plaster guard dome in place at this time.
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Tab O-Ring
Setscrew
Collar
Valve Stem |
Minor Adjustment |
Major Adjustment |
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Temperature Limiting Adjustment
CAUTION: Risk of personal injury. The water temperature should never be set above 120°F (49°C).
Turn the valve stem clockwise to the full open position. Allow the water to run for several minutes.
Using a thermometer, check the water temperature.
Turn off the water.
Minor Temperature Adjustment
Using a hex wrench, turn the setscrew clockwise to lower the temperature and counterclockwise to raise the temperature.
Recheck the water temperature.
Major Temperature Adjustment
Remove the O-ring and collar from the valve stem.
Slowly turn the valve stem until the water temperature is 120°F (49°C) or less.
Leave the water running at the desired maximum temperature and reinstall the collar with the setscrew positioned against the tab.
Turn off the water.
Reinstall the O-ring.
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Warranty
KOHLER® Faucet Lifetime Limited Warranty
Kohler Co. warrants its Faucets* manufactured after January 1, 1997, to be leak and drip free during normal residential use for as long as the original consumer purchaser owns his or her home. If the Faucet should leak or drip during normal use, Kohler Co. will, free of charge, mail to the purchaser the cartridge necessary to put the Faucet in good working condition. This warranty applies only to Kohler Faucets installed in the United States of America, Canada or Mexico (″North America″).
Kohler Co. also warrants all other aspects of the faucet or accessories (″Faucet″)*, (except gold, non-Vibrant®, non-chrome finishes) to be free of defects in material and workmanship during normal residential use for as long as the original consumer purchaser owns his or her home. This warranty applies only to Kohler Faucets installed in North America. If a defect is found in normal residential use, Kohler Co. will, at its election, repair, provide a replacement part or product, or make appropriate adjustment. Damage to a product caused by accident, misuse, or abuse is not covered by this warranty. Improper care and cleaning will void the warranty**. Proof of purchase (original sales receipt) must be provided to Kohler Co. with all warranty claims. Kohler Co. is not responsible for labor charges, installation, or other incidental or consequential costs. In no event shall the liability of Kohler Co. exceed the purchase price of the Faucet.
If the Faucet is used commercially or is installed outside of North America, or if the finish is gold, non-Vibrant or a painted or powder coated color finish, Kohler Co. warrants the Faucet to be free from defects in material and workmanship for one (1) year from the date the product is installed, under Kohler Co.’s standard one-year limited warranty.
If you believe that you have a warranty claim, contact Kohler Co., either through your Dealer, Plumbing Contractor, Home Center or E-tailer, or by writing Kohler Co., Attn.: Customer Care Center, 444 Highland Drive, Kohler, WI 53044, USA. Please be sure to provide all pertinent information regarding your claim, including a complete description of the problem, the product, model number, color, finish, the date the product was purchased and from whom the product was purchased. Also include your original invoice. For other information, or to obtain the name and address of the service and repair facility nearest you, call 1-800-4-KOHLER (1-800-456-4537) from within the USA and Canada, and 001-800-456-4537 from within Mexico, or visit www.kohler.com within the USA, www.ca.kohler.com from within Canada, or www.mx.kohler.com in Mexico.
KOHLER CO. AND/OR SELLER ARE PROVIDING THESE
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