Water Pressure Regulator Valve Rebuild 

A pressure reducing valve (PRV) is a variable friction loss device. To have friction loss the fluid needs flow. Unless the valve seats perfectly the downstream pressure is going to equalize to the upstream pressure. Once the downstream pressure is relieved (opening a valve) the PRV will open allowing the upstream pressure to compensate for the loss of downstream pressure to the spring set setpoint. The point is: to check the PRV setpoint a small flow is needed in the downstream. In most cases there is likely a dripping faucet or some other flow that will overcome the seat leakage but to be safe, crack a faucet open downstream to be sure the system is not hydraulically locked. Good video . Helped me prepare to do mine.

Nicely done, simple and straight forward!

Nice how they run that power line right in your way

Typical domestic water pressure is 45-50 PSI. You can set it to whatever you want but higher pressure just wastes water and puts more stress on your pipes and appliances. Maximum permitted by code is 75 and most municipalities will easily exceed that in off hours during idle periods in the early morning. If you're having a volume problem and everything else is fine that would point to the pipe size being inadequate. A lot of new homes are being built with 1" main supply piping. Typically, with a 20 psi falloff (when you open a faucet) you won't notice a difference between 55 psi and 75 psi. It's very small.

Nice video, I replaced this valve and it was super easy thanks to all the info here.

Thanks for the video man . I really thought it was gonna cost me an arm and a leg but you save me some money.

Thanks for the video. I'm going to attempt the same repair today. I did notice an electrical line right next to your plumbing. I would suggest that circuit be switched off before doing any plumbing in that area.

Excellent video. Concise and clear. Thanks

You did a nice job on the video. Exactly what I needed to see. Thank you.

PSI should be 30-60. WOW, you cross threaded the right inlet union on the PRV.

pretty cool thanks I need to do a 1.25" rebuild or replace. I think ill rebuild looks easy.

thanks for making this video 👍

That's a big ass spider @ 1:25 😂 scared me

Several months on, how has the repair held up? I just cleaned a bunch of that dirt/silt out of my PRV and while it did help at first, the problem seems to be creeping back. I wonder if it’s just an exercise I’ll need to repeat because either I didn’t flush enough out, or the source of the contamination is unresolved

👌👌

Great video! but where to buy that rebuild kit?

Hope you and your family DON'T drink that water. OMG man.....

In my experiences, it's easier just to replace the whole valve