Shower Handle: 3372 and 3375 Independent Transfer Valves

3372 transfer valve:

• Independent Functions: 2 
• Shared Functions: 1

3375 transfer valve: 

• Independent Functions: 2
• Shared Functions: 0

The 3372 transfer valve was introduced in 2009 and the 3375 transfer valve was introduced in 2012. They are both designed to divert water from one shower device to another (example: body sprays to a showerhead). Both the 3372 and 3375 Transfer valves require either a PosiTemp or a Moentrol shower valve to provide water to supply to the system. 

Moen Transfer valves use different handle mechanisms and the set screw to remove the handles are not in the same access point. Use the information below to identify the location of the set screw for your transfer valve. 

Behind the Plug Button  

Used with valves: 3372 and 3375

This style of handle has a small removable cap at the front of the handle concealing a Phillips screw

Under the Lever  

Used with valves: 3372 and 3375

This style of handle has a small hole on the underside of the handle that contains a Hex screw. 

Under the Escutcheon Plate 

Used with valves: 3372 and 3375

This style of handle has a small hole on the underside of the decorative handle escutcheon that contains a Hex screw. 

If this is not your handle mechanism, see Vertical Spa: Transfer Valves article to learn more about the different handle mechanism types.

Disassembly:

1. Gently pry the cap (#1A) off of the end of the handle (#1C).

2. Using a Phillips screwdriver, unthread the handle screw (#1B) counter-clockwise and remove the handle (#1C).

3. Slide the spacer (#1D) off the assembly.

To replace the cartridge (#1E), see article 116719 and 162154 Cartridge: 3372 or 3375 Independent Transfer Valves.

Assembly:

1. Confirm that the cartridge clip is installed and use pliers to pull the brass stem of the cartridge (#1E) outward. Note: To ensure the proper operation from the valve, the cartridge stem must remain pulled outward.
2. Rotate the stem of the cartridge (#1E) so the two flat sides of the brass stem are facing to the left and right.
3. Slide the spacer (#1D) onto the assembly.
4. Position the handle (#1C) with the lever facing down, slide the handle (#1C) onto the assembly and use a Phillips screwdriver to thread the handle screw (#1B) clockwise until tight. Push the cap (#1A) back into the handle (#1C).

If this is not your handle mechanism, see Vertical Spa: Transfer Valves article to learn more about the different handle mechanism types.

Disassembly:

1. Remove the handle set screw (#2A) by inserting the 3/32" Hex wrench into the hole underneath the handle (#2B) to unscrew the set screw (#2A).

2. To remove the handle adapter (#2D), use a Phillips screwdriver to unthread the adapter screw (#2C) counter-clockwise.

3. Slide the spacer (#2E) off the shower assembly.

To replace the cartridge (#2F), see article 116719 and 162154 Cartridge: 3372 or 3375 Independent Transfer Valves.

Assembly:

1. Confirm that the cartridge clip is installed and use pliers to pull the brass stem of the cartridge (#2F) outward. Note: To ensure the proper operation from the valve, the cartridge stem must remain pulled outward.
2. Rotate the stem of the cartridge (#2F) so the two flat sides of the brass stem are facing to the left and right.
3. With the stem of the cartridge (#2F) pulled forward, slide the spacer (#2E) onto the assembly.
4. Slide the handle adapter (#2D) onto the shower assembly. Using a Phillips screwdriver, thread and tighten the adapter screw (#2C) into the center of the handle adapter (#2D).
5. With the lever pointing down, slide the handle (#2B) onto the adapter (#2D) and use a 3/32" hex wrench to tighten the handle screw (#2A).