116719 and 162154 Cartridge: 3372 or 3375 Independent Transfer Valves

A transfer valve directs water flow from one showering device to another. This article will provide step-by-step instructions on replacing the 116719 or 162154 diverter cartridges in the 3372 and 3375 Transfer valves.

How do I know which valve in my showering system is the transfer valve?

• #1 Transfer Valve: The transfer valve is usually installed above the mixing valve and characteristically has a smaller trim plate. When the mixing valve is turned on, the transfer valve handle can be rotated to activate the individual showering devices to function independently or simultaneously, depending on the valve.
• #2 Mixing Valve: The mixing valve is housed behind the handle or knob in your shower and is responsible for turning the water supply to the entire system on and off. It is usually installed below the transfer valve and characteristically has a larger trim plate. 

Replacing the 116719 or 162154 cartridge will require disassembling the transfer valve.

​ Preparation:

• The water supply must be turned off- see article How to Turn Off the Water Supply to the Faucet.
• Recommended Tools: Phillips Screwdriver, Pliers
• The following instructions assume the handle and associated handle pieces have been removed. For additional details, visit  Vertical Spa: Independent Transfer Valves and select the type you are repairing. The faucet guide will contain specific information on handle assemblies associated with that style of product.
• We recommend covering the drain before beginning so as to not lose any parts down the drain.

Disassembly:

1. Lift the tab at the top of the U-shaped copper-colored retaining clip (#3A) just enough to grab it with your hand to fully remove it. Be careful not to drop the clip (#3A) behind the wall. 

2. Using the plastic twisting tool (see Image 1 below) provided in the cartridge service kit (#3B), rotate the cartridge (#3B) 1/4 of a turn (90 degrees) in either direction (see Image 2 below). This will help loosen the cartridge (#3B). Remove the twisting tool from the top of the cartridge (#3B). Pull out the stem of the cartridge (#3B) until it stops. Using pliers, grab the stem of the cartridge (#3B) and pull the cartridge (#3B) out (see Image 3 below). This may require some effort. 

Note: It is highly recommended to clean and flush the valve body (#3C) before installing the new cartridge (#3B). See Valve Body Cleaning and Flushing for additional details.

Assembly:

1. Slide the new cartridge (#3B) into the brass valve body (#3C). Ensuring the correct positioning of the cartridge (#3B) will require that the plastic tabs on the cartridge must be centered on the slots on the valve body (#3C). These slots are located at the 12 and 6 o'clock positions. Use the twisting tool to help position the cartridge (#3B) correctly in the valve body (#3C).
2. Gently slide the copper clip (#3A) back into the brass valve body (#3C) on top of the cartridge (#3B). If you encounter any resistance, do not force the copper clip (#3A). The cartridge ((#3B) may not be properly aligned (see step 1). If for any reason the copper clip (#3A) cannot be installed, the water cannot be turned back on to the shower system until the copper clip (#3A) is replaced.
3. Pull the brass stem of the cartridge (#3B) outward.
4. Rotate the stem of the cartridge (#3B) so the notch indentation is facing towards the 9 o'clock position. Note: To ensure the proper operation from the valve, the cartridge stem must remain pulled outward. Move back to How to Remove Your Escutcheon: 2 Types for information on installing the escutcheon.