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Remove Old Cartridge — Extract the Old Cartridge

Beginner3 hours

Part of project

How to Replace a Leaky Shower Cartridge (Delta Monitor & Moen Models) · Step 4 of 6

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In this video

Unscrew the black plastic retainer nut. Next, use a small tool or screwdriver to carefully pry up and pull out the U-shaped copper retainer clip that holds the cartridge in place. Grab the stem of the old cartridge with a pair of pliers and pull it straight out of the valve body. A dedicated cartridge puller tool may be needed if it's stuck.

Goal: Extract the worn-out cartridge

  • Channel-lock pliers or a dedicated Moen cartridge puller tool will also work effectively to remove the cartridge.

Used in this video

  • Wrench — Unscrewing the black plastic retainer nut
  • Pliers (Pliers_Type: Channel-Lock) — Gripping and pulling out the old cartridge
  • Cartridge Puller (brand: Moen) · optional — Removing a cartridge that is stuck due to mineral deposits
  • Small Prying Tool — Prying out the copper retainer clip
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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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Use a wrench to unscrew the black plastic retainer nut. Pull out the copper retainer clip and pull out the cartridge with your pliers. Channel locks or a cartridge puller will also work.

Auto-generated transcript. May contain errors.