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Remove The Old Cartridge — Remove the Old Valve

Beginner3 hours

Part of project

Delta Shower Faucet Installation & Upgrade Guide · Step 3 of 5

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In this video

With the handle and trim removed, you can now access the old cartridge. First, use channel-lock pliers to grip and unscrew the large bonnet nut that holds the cartridge in place. Once the nut is off, use needle-nose pliers to grip the stem of the old cartridge and pull it straight out of the valve body. If it is difficult to remove, a cartridge puller tool can be used. Inspect the old cartridge to see the worn-out seals or cracks that were causing the leak.

Goal: Remove Old Cartridge

  • If the cartridge is stuck due to mineral buildup, a cartridge puller can provide the necessary leverage without damaging the plumbing.

Used in this video

  • Channel-Lock Pliers (Tool Type: Hand Tools, Pliers Type: Channel-lock) — Unscrewing the bonnet nut
  • Needle-Nose Pliers (Tool Type: Hand Tools, Pliers Type: Needle-nose) — Gripping and pulling out the old cartridge
  • Cartridge Puller (Tool Type: Plumbing Tools) · optional — Removing a stuck cartridge
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FAQs

How do I ensure the water is completely off before I start the installation?

Locate the main water shut-off valve for your home or the specific shut-off valves for the bathroom. After turning them off, open the existing shower faucet handles to release any remaining pressure and confirm water flow has stopped. This prevents unexpected gushes and makes the job cleaner and safer.

Besides a screwdriver and pliers, what other tools might I need for removing my old faucet or installing the new Delta one?

You might need an Allen wrench (often included with new faucets or for old handle removal), a utility knife for cutting caulk/sealant, and plumber's tape (Teflon tape) for threaded connections. A basin wrench can sometimes be helpful for tight nuts, though less common for shower valves.

What are the most common reasons for leaks after installing a new Delta shower faucet, and how can I prevent them?

Leaks often occur due to improperly tightened connections, missing O-rings, or incorrect cartridge seating. Ensure all threaded connections are hand-tightened, then given a quarter to half turn with a wrench, using Teflon tape on male threads. Double-check that the cartridge is fully inserted and secured according to Delta's specific instructions.

Is the 3-hour estimated time realistic for a beginner, or should I budget more time, especially if removing an old faucet?

While 3 hours is achievable for a straightforward replacement, beginners should budget 4-6 hours. Removing an old, corroded faucet can take extra time and effort if screws are seized or old caulk needs extensive cleaning. Always allow buffer time for unexpected issues.

Transcript
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Degental to avoid damaging the tile or wall surface. Now here's the fun part removing the old cartridge. You'll see the cartridge inside the valve body. Use your needle nose pliers to grip the cartridge and pull it straight out if it's stuck. Don't force it. You can use a cartridge puller tool I'll link one below to make this step easier. Once the cartridge is out, take a moment to inspect it. You'll probably see worn out seals or cracks that's what's causing the leak. Toss the old cartridge aside. We won't be needing it anymore.

Auto-generated transcript. May contain errors.