200758 and 200759 Cartridge: U231 or U361 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 200758 or 200759 diverter cartridges in the M-Core Vertical Spa U231 and U361 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 200758 or 200759 cartridge will require disassembling the transfer valve.

The replacement of the cartridge will require the handle to be removed prior to beginning. For additional information on removing your handle or identifying your handle mechanism, see Vertical Spa: Independent Transfer Valves.

​Preparation:

• The water supply must be turned off- see article How to Turn Off the Water Supply to the Faucet.
• Recommended Tools: Phillips Screwdriver, Needle-Nose Pliers, Adjustable Wrench or Pliers, Pick, Safety Glasses
• We recommend covering the drain before beginning so as to not lose any parts down the drain.

Disassembly:

1. Using a Phillips screwdriver, unthread the two escutcheon screws (#1A) counter-clockwise.

2. Slide off the escutcheon plate (#1B)  Note: There may be some caulking on the wall around the escutcheon plate (#1B) which can cause some resistance.

3. Remove the mounting plate (#1D) by using a Phillips screwdriver to unthread the two mounting plate screws (#1C) counter-clockwise.

Assembly:

1. To reinstall the escutcheon plate (#1B), follow steps 1-3 in reverse order.

Note: The retaining clip (#2C) and limiter (#2D) are not used in all installations.

1. Using an adjustable wrench, unthread the cartridge nut (#2A) counter-clockwise.

2. Slide the cartridge (#2B) out of the valve body (#2E). The retaining clip (#2C) and the limiter (#2D) are not used on all installations. If these parts are installed, they will remove with the cartridge (#2B).

Note: It is highly recommended to clean and flush the valve body (#2E) before installing the new cartridge (#2B). See Valve Body Cleaning and Flushing for additional details.

The assembly instructions vary based on your system configuration. Begin by reviewing the following images to determine if you have a 2 or 3 device system.

1. Remove the retaining clip (#2C) from the cartridge (#2B) by inserting a pick into the small notch on the top of the retaining clip (#2C) and carefully pry the retaining clip (#2C) off the stem of the cartridge (#2B).

2. Slide the limiter (#2D) off the stem of the cartridge (#2B).

3. There are two feet on the back of the cartridge (#2B) that align with two notches inside the valve body (#2E). Align the feet with the notches and slide the cartridge (#2B) into the valve body (#2E).

4. Thread the cartridge nut (#2A) on by hand and then use an adjustable wrench to tighten.

5. Rotate the stem of the cartridge (#2B) so the side with the missing spline is pointing down.