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Moen Solutions

Valve Body Cleaning and Flushing

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When installing a new cartridge, Moen recommends the valve body be cleaned and flushed out. This eliminates any mineral build-up and loose debris that may have accumulated inside the valve body. This debris could damage the new cartridge or obstruct the flow of water. The instructions below are based on the product type, Deckmount or Wallmount Faucets.

Please note that the water may come out of the valve body with considerable force, follow the steps below to control the flushing process.

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Preparation:

  • The following instructions assume the handle, associated handle pieces and cartridge have been removed. For additional information visit Solutions.moen.com and select the type you are repairing.
  • Recommended Tools: Nylon bristle brush (ex: toothbrush or bottle brush), paper towels. (If you are working on a Deckmount Faucet, you will also need a towel and a large bowl)
  • You may need two people for Deckmount Faucets, review step 3: Begin the Flushing Process.
Instructions: Deckmount Faucets: Wallmount Faucets:
1. Prepare the Area
 Wrap a towel around the base of the faucet and have a large bowl ready. Does not apply.
2. Clean the Valve Body
 Gently scrub the inside walls of the valve body with a nylon bristle brush to remove any mineral build-up. Gently scrub the inside walls of the valve body with a nylon bristle brush to remove any mineral build-up.
3. Begin the Flushing Process

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To clear the system, water will need to be forced through the valve body.

One person will position a large bowl upside down over the open valve body to redirect the water back into the sink. A second person will need to turn the water on slightly to allow a small flow of water to go through the system.

If you are using hot and cold shutoff's, this process will need to be repeated (one at a time) for both sides.

To clear the system, water will need to be forced through the valve body.

As a safety precaution, Moen recommends standing outside of the tub or shower when the faucet shutoff's or water main supplies are turned on. Turn the water on slightly to allow a small flow of water to go through the system.

If you are using hot and cold shutoff's, this process will need to be repeated (one at a time) for both sides.
4. Prepare for Cartridge Installation
 Using a rolled up paper towel, remove any excess water from the bottom of the valve body. If the water is not eliminated, the cartridge will not fit all the way back in. Using a rolled up paper towel, remove any excess water from the back of the valve body. If the water is not eliminated, the cartridge will not fit all the way back in.
5. Install the Cartridge
 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. 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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