Remove the Cartridge Retaining Nut

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1:00

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No. 1 Cause For These Things Failing! #helpingothers #plumbing #mixingvalve #diy #plumber

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What happens here

First, the blue plastic cap covering the top of the valve is removed by hand. This exposes a brass retaining nut that secures the internal cartridge. The presenter uses a large adjustable wrench or channel locks to grip the retaining nut and turn it counter-clockwise, carefully unscrewing it from the valve body.

Tools and materials

Adjustable Wrench (or Channel Locks)
Thermostatic Mixing Valve

What they say

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I've tried and tried to put this back together man I can't get it this is that thermostatic mixing valve that I took out of my neighbor's house we're gonna look inside I've never actually took one of these apart I'm kind of interested right there we go a little bit of a spring action here oh there we go that just popped apart

Auto-generated from the video audio.

That Fix It GuyAir Force–trained plumber

Brian learned plumbing in the U.S. Air Force and has plumbed his way around the world. Now he films the fixes homeowners actually face: slow toilets, dripping faucets, clogged drains, failing water heaters and disposals. He shows what broke, why it broke, and how to fix it for a fraction of the cost of replacing it. He's particular about the right part, too: no snappy traps, no chemical drain cleaners. His rule: if he can do it, you can do it.

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Also in this video

0:000:08

Identify the Valve and Initial Disassembly Attempt

0:080:13

Remove the Cartridge Retaining Nut

Playing

0:210:14

Extract and Inspect the Cartridge

0:350:08

Identify the Cause of Cartridge Failure

0:430:16

Evaluate Repairability and Conclude