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Stesso

Replace the Thermostatic Mixing Valve

3:26
8:10
118.9K views

At 3:26 in

No Hot Water In Bathtub But Hot Water In Sinks???

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What happens here

Use a backup wrench or another pair of pliers to stabilize the existing PEX pipes connected to the mixing valve, as PEX can be flimsy. Then, use adjustable pliers or a wrench to carefully loosen and remove the unions connecting the hot and cold supply lines to the old thermostatic mixing valve. Once disconnected, remove the old valve. Align the new thermostatic mixing valve, ensuring the hot and cold sides are correctly oriented (typically indicated by 'H' and 'C' or color coding), and carefully connect the unions, tightening them securely with pliers or a wrench.

Goal: Replace the faulty thermostatic mixing valve with the new one.

Tools and materials

  • Adjustable Pliers — Loosening and tightening plumbing unions
  • Backup Wrench/Pliers — Stabilizing pipes while loosening unions

What they say

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bunch of water upstairs, opening upstairs faucet. Oh yeah, use a backup wrench for this, right? All this pecs pipe is going to be a little bit foxy, but that is super easy. There we go. So just a little pressure off of that and then these are going to be able to pop right on out of there. Okay, interesting. Just plastic washers. That'd be fine. So it is cash-acme. Same thing, a little bit different of a design, different washers. All right, and I'm going to go ahead and put these rubber ones in with the screens. Just so we don't get anything on the inlet and outlet and hot side hot cold side cold. So this does get flipped this way. Okay, we're not going to mess with this knob. I want to see if it actually

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