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Inspect and Clean the Valve Body — Clean Valve and Install New Cartridge

Beginner3 hours

Part of project

How to Replace a Leaky Shower Cartridge (Delta Monitor & Moen Models) · Step 5 of 6

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In this video

After the old cartridge has been removed, carefully inspect the inside of the brass valve body. Check for any leftover pieces of rubber O-rings, mineral deposits, or other debris. It is crucial to clean the interior of the valve thoroughly before installing the new cartridge to ensure it seats correctly and creates a watertight seal.

Goal: Shower Repair

  • A small dental pick or a cloth can be used to remove stubborn debris from inside the valve body.

Used in this video

  • Flashlight (brand: Any) · optional — To illuminate the inside of the valve body for inspection.
  • Cleaning Cloth (brand: Any) — To wipe out debris from inside the valve body.
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FAQs

How difficult is it to replace a shower cartridge, and what should I expect for time and cost?

This project is rated as "beginner" and typically takes about 3 hours for someone with basic DIY skills. The main cost will be the replacement cartridge itself, which varies by brand (Delta or Moen) and model, usually ranging from $30-$80.

What specific tools do I absolutely need before I start this project?

You'll definitely need Phillips and flathead screwdrivers, an adjustable wrench, and tongue and groove slip joint pliers. Also, have a rag for drips and plumber's grease for new O-rings. Ensure you have the correct replacement cartridge for your specific faucet model.

What are the most crucial safety precautions I need to take before starting this cartridge replacement?

The most critical step is to completely shut off the main water supply to your house or specifically to the bathroom before starting. After shutting off, open a nearby faucet to relieve any remaining pressure in the lines. Protect your tub/shower finish from dropped tools.

How do I make sure I buy the exact right replacement cartridge for my specific shower?

To ensure you get the correct cartridge, first try to identify your faucet's brand (Delta Monitor or Moen) and model. Often, the old cartridge will have a model number printed on it; take a photo of it. If not, consult your faucet's manual or remove the old cartridge and take it to a plumbing supply store for identification.

Transcript
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Set the set screw like this, grab a hold of it real tight and wiggle it out. It should pop out real easy. Make sure there's no debris in there before you put the new one in.

Auto-generated transcript. May contain errors.