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1225 Cartridge: Moentrol with Integrated Transfer Valve

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This article will provide step-by-step instructions on how to replace a 1225 cartridge in a 3320, 3330 and 3350 Moentrol with an Integrated Transfer Valve shower system. In this two handle shower system, the 1225 cartridge is located behind the lower handle and controls the flow and temperature of the water.

​ Preparation:

  • The water supply shut off valves 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: Moentrol with Integrated Transfer Valve 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 to not loose any parts down the drain.
Egg-Shaped Escutcheon Plate (Prior to 2007):

Snag_cbffa2.png

Disassembly:

  1. To remove the upper mounting cup (#2A), use a Phillips screwdriver to unthread the upper mounting cup screws (#1A) counter-clockwise. Repeat this step for the lower mounting cup (#4A) and lower mounting cup screws (#3A).
  2. Slide off the escutcheon plate (#5A).
  3. Grab ahold of the stop tube (#6A) and pull it forward until it has been removed.
  4. Lift the tab at the top of the U-shaped copper colored retaining clip (#7A) just enough to grab it with your hand to fully remove. Be careful not to drop the clip (#7A) behind the wall.

  5. Using the plastic twisting tool (see Image A below) provided in the 1225 cartridge kit (#8A), rotate the cartridge (#8A) 1/4 of a turn (90 degrees) in either direction. This will help loosen the cartridge (#8A). Remove the twisting tool from the top of the cartridge (#8A). Pullout the stem of the cartridge (#8A) until it stops. Using pliers, grab the stem of the cartridge (#8A) and pull the cartridge (#8A) out. This may require some effort. If you are replacing the 92451 service kit, see 92451 Cartridge Service Kit Repair Guide for additional details.Note: It is highly recommended to clean and flush the valve body (#9A) before installing the new cartridge (#8A). See Valve Body Cleaning and Flushing  for additional details.

Image A:

Snag_f25a4c.png Snag_69c75d6.png Snag_69cabda.png

Assembly:

1. Slide the new cartridge (#8A) into the brass valve body (#9A). Use the twisting tool to position the cartridge (#8A) correctly in the valve body (#9A). The plastic tabs on the cartridge (#8A) must be centered on the slots on the valve body (#9A), which are located at the 12 and 6 o'clock positions. Snag_d73477.png
2. Gently slide the copper clip (#7A) back into the brass valve body (#9A) on top of the cartridge (#8A). If you encounter any resistance, do not force the copper clip (#7A). The cartridge (#8A) may not be properly aligned (see step 1). If for any reason the copper clip (#7A) cannot be installed, the water cannot be turned back on to the shower system until the copper clip (#7A)  is replaced. Snag_d59bd6.png
3. Rotate the stem of the cartridge (#8A) so the small notch is facing down. The notch on the stem of the cartridge (#2) determines the hot and cold location. If the hot and cold are reversed, rotate the stem of the cartridge (#8A) 180 degrees.

Snag_d9669a.png

4. Slide the stop tube (#6A) back onto the valve body (#9A).

5. Position the escutcheon plate (#5A) with the word "Moen" upright and slide it onto the valve body (#9A).

6. Position the upper mounting cup (#2A) so the screw holes lines up with the screw holes on the valve body (#9A). While holding the upper mounting cup (#2A) in position, use a phillips screwdriver to thread the upper mounting cup screws (#1A) clockwise until tight. Repeat this step with the lower mounting cup (#4A) and lower mounting cup screws (#3A).
Oval Shaped Escutcheon Plate (After 2007):

Snag_10df89c.png

Disassembly:

1. To remove the escutcheon plate (#2B), use a Phillips screwdriver to unthread each of the four escutcheon screws (#1B) counter-clockwise.

2. Grab ahold of the stop tube (#3B) and pull it forward until it has been removed.

3. Lift the tab at the top of the U-shaped copper colored retaining clip (#4B) just enough to grab it with your hand to fully remove. Be careful not to drop the clip (#4B) behind the wall.

4. Using the plastic twisting tool (see Image 1 below) provided in the 1225 cartridge and cartridge repair kit, rotate the cartridge (#5B) 1/4 of a turn (90 degrees) in either direction (see Image 2 below). This will help loosen the cartridge (#5B). Remove the twisting tool from the top of the cartridge (#5B). Pullout the stem of the cartridge (#5B) until it stops. Using pliers, grab the stem of the cartridge (#5B) and pull the cartridge (#5B) out (see Image 3 below). This may require some effort. If you are replacing the 92451 service kit, see 92451 Cartridge Service Kit Repair Guide for additional details. Note: It is highly recommended to clean and flush the valve body (#6B) before installing the new cartridge (#5B). See Valve Body Cleaning and Flushing  for additional details.

Image 1

Snag_f25a4c.png

Image 2

Snag_69c75d6.png

Image 3

Snag_69cabda.png

Assembly:

1. Slide the new cartridge (#5B) into the brass valve body (#6B). Use the twisting tool to position the cartridge (#5B) correctly in the valve body (#6B). The plastic tabs on the cartridge (#5B) must be centered on the slots on the valve body (#6B), which are located at the 12 and 6 o'clock positions. Snag_d73477.png
2. Gently slide the copper clip (#4B) back into the brass valve body (#6B) on top of the cartridge (#5B). If you encounter any resistance, do not force the copper clip (#4B). The cartridge (#5B) may not be properly aligned (see step 1). If for any reason the copper clip (#4B) cannot be installed, the water cannot be turned back on to the shower system until the copper clip (#4B)  is replaced. Snag_d59bd6.png
3. Rotate the stem of the cartridge (#5B) so the small notch is facing down. The notch on the stem of the cartridge (#5B) determines the hot and cold location. If the hot and cold are reversed, rotate the stem of the cartridge (#5B) 180 degrees.

Snag_d9669a.png

4. Position the escutcheon plate (#2B) so the word "Moen" appears upright and slide it onto the valve body (#6B).

5. Using a Phillips screwdriver, thread each of the four escutcheon screws (#1B) clockwise until tight.

For additional information on Moen products visit solutions.moen.com and select the type of product you are repairing. The guide will contain repair details, troubleshooting and specific information on assembling handles associated with that style of product.

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