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Tighten Retaining Nut and Test for Leaks — Reassemble and Test

Beginner2 hours

Part of project

Delta Shower Cartridge Replacement: A Step-by-Step DIY Guide · Step 5 of 5

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In this video

Place the cartridge back into the faucet body, making sure the two small locating pins on the bottom of the cartridge line up with the holes in the faucet base. Thread the brass retaining nut back on and tighten it by hand until it is finger-tight. Then, using channel-lock pliers, give the nut a small additional turn (about an eighth of a turn) to make it snug. Slowly turn the water supply back on to check if the leak has stopped before reassembling completely.

Goal: Stop the leak

  • Do not overtighten the retaining nut, as this can strip the brass threads and damage the faucet.

Used in this video

  • Channel-Lock PliersSnugging the brass retaining nut to secure the cartridge and stop the leak.
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FAQs

Do I really need a special cartridge puller tool for this Delta shower cartridge replacement?

While not always mandatory, a Delta cartridge puller tool can be invaluable, especially if the old cartridge is stuck due to mineral buildup. You might get by with needle-nose pliers and a a flathead screwdriver if it's not too stubborn, but having the puller prevents frustration and potential damage to the valve body.

The project says 'beginner' and '2 hours.' Is this accurate for a first-timer, and what's the typical cost of a new Delta cartridge?

Yes, this project is generally beginner-friendly, but a first-timer might take closer to 2-3 hours, especially if the old cartridge is difficult to remove. A new Delta cartridge typically costs $20-$50, depending on the specific model and where you purchase it.

What should I do if the old Delta cartridge is stuck and won't come out after removing the retaining clip?

A stuck cartridge is a common issue, often due to mineral deposits. Ensure you've removed the retaining clip. If it's still stuck, firmly but gently twist with needle-nose pliers, or use a dedicated Delta cartridge puller tool which provides better leverage. You can also try applying penetrating oil around the cartridge base and letting it sit for a few minutes before trying again.

How do I make sure I buy the correct Delta replacement cartridge for my specific shower?

Delta manufactures several cartridge models. The best way to ensure you buy the correct one is to remove your old cartridge first and take it to the store for comparison. Alternatively, check your shower trim for a model number or consult Delta's website with photos of your existing faucet to identify the part number.

Transcript
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see if this stuff some bleed this does have to go down a certain way those do you pins right there go in the back there it is seated correctly now cuz as I turn the stem it's not moving so that's seated correctly in there with this retaining ring back in I get it finger tight then I use a pair of channellocks I like speed channel locks I'm not gonna crank it hard I'm just going to put it a little bit pass finger tight so they do not want to strip this so that's just a little bit doesn't snag lets you stack everything still there's a nice seat here I'm going to actually turn the water on now open see if I have any leaks

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