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Remove and Inspect the Old Cartridge — Gather Tools and Supplies

Beginner3 hours

Part of project

How to Replace a Leaky Shower Cartridge (Delta Monitor & Moen Models) · Step 1 of 6

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In this video

As a final method, remove the old cartridge for inspection. First, turn off the main water supply to the shower. Use a hex wrench to loosen the set screw on the faucet handle and remove the handle. Slide off any sleeves or covers. Use pliers to carefully pull out the cartridge retaining clip. You may need to turn a bonnet cap counter-clockwise to release the cartridge. Once removed, inspect the cartridge for any serial numbers. It's recommended to take the old cartridge to a plumbing store for a precise match. Measuring it with a caliper and taking a photo can also be helpful.

Goal: Inspect Old Cartridge

  • Ensure the main water supply to the shower is turned off before starting.
  • Measure the old cartridge with a caliper and take a photo to make matching it at the store easier.

Used in this video

  • Hex Wrench (Tool Type: Hand Tools, Power Source: Manual, Allen Wrench/Hex Key Size: Various sizes) — To loosen the set screw on the faucet handle.
  • Pliers (Tool Type: Hand tools, Power Source: Manual, Pliers Type: Needle-nose, Slip-joint) — To pull out the cartridge retaining clip.
  • Caliper (Tool Type: Measuring Tools, Power Source: Manual, Measuring Tool: Caliper) · optional — To precisely measure the old cartridge for matching.
  • Camera/Phone (Tool Type: Electrical Tools, Power Source: Battery) · optional — To take a photo of the old cartridge for identification at a store.
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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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Step 3. Inspect the old cartridge for a serial number. If you still can't identify the model, it's time to remove the old cartridge. Start by turning off the water supply. Use a hex wrench to loosen the screws, then remove the handle. Carefully slide out the cartridge clip, and if your faucet has a bonnet cap, turn it left to release the cartridge. Once removed, take the old cartridge to a plumbing store to identify the serial number. Measure your cartridge with a caliper and take a quick photo. This can help the plumbing store match your cartridge precisely.

Auto-generated transcript. May contain errors.