Cool will try. Can you connect larger 1 inch prv to 3/4 inch pex pipe? How to reduce the size?

@@ncvman The valves come with charts that show pressure in relation to flow. The only way to know the amount of pressure at a given flow rate is to look at the charts.

I just serviced it last week and it is working better than ever before. There were a lot of small debris and chlorine buildup in there. You need to flush them out of the input pipe as well (so much more in there, as they can't go through the strainer). I would service it every few years and then replace it after 10-20 years. The design of the valve is way too simple to go wrong, but the rubber seal rings, diaphragm do wear out over time.

I replaced it under warranty and no issues ever since

In my case, the problem of low pressure was solved by replacing this PRV with a bigger size allowing for higher flow rate with lower pressure drop. Just a quarter inch upgrade was enough. Thanks for sharing your experience.

@@akhaqan My flow tests and the specs indicate the 3/4 inch should be adequate for my needs. Maybe the one inch is just a better valve. I've ordered a replacement Watts. In the mean time I'm going to try some emery cloth on the valve body.

@@jonathanhal Great. I have found through experience that its always better to oversize slightly especially when you have the option of laying new plumbing, the chances of hearing water flow in pipes reduces dramatically, 3/4" vs 1". For energy efficiency, hot water pipes need to be as small diameter as possible. That's a whole subject onto itself on how to design for energy efficiency.

I am not sure if it can be repaired. You can get a new similar valve and just replace the internals.

Hi, I have the same type of leak. Did you ever get resolved?

If there is anything loose, then tighten it. If the leak doesn't stop then try replacing the internals only, not the complete assembly.

@@akhaqan Thanks

@@akhaqan Do they sell separate pieces if I want change just the internals piece

@@amitpathak8823 I am not sure, you can buy the complete valve and use the internals of the new valve.

Where did you find a 70XL? I contacted Zurn/Wilkins directly, and they said they no longer make that model. NR3XL is the new replacement model

@@Jdwg1972 SupplyHouse.com, Ferguson and Home Depot sell them. There are also Watts and other brand PRVs.

@@DragonBuilds Just went to Ferguson’s , said the same thing🤣 New model replaced the 70XL

@@Jdwg1972 Buy a Watts PRV or something.

@@DragonBuilds homeowner DIY’er. Sorry for what seems to be basic questions, but was looking to find the same 1 1/2” PRV for exact dimensions, since the manifold is all copper. I’ve never sweat pipes before and it could be a costly mistake.

Yes I did. I replaced the valve with a new one of 1".

Try to service it first. I did it and it fixed my problem. Before that, water was just dripping out of the faucets, and it did not maintain constant pressure.

What's prv

What's prv

@@akhaqan same brand?

Thanks. It seems you don't have an understanding of how a PRV works or how pipe sizing is done to keep pressure drop to an optimum level, this is the basics of hydraulics & hydrostatics. Pressure drop increases with increased flow rate, to counter that, pipe diameter is increased with certain design assumptions e.g. 4 faucets of 1.5 gpm will be open at the same time, so the pipe diameter has to be certain size to ensure that each faucet maintains 1.5 gpm and the main pipe can sustain 6 gpm. Now coming to PRV, Pressure Regulating Valve, it's main job is to control the pressure downstream of the valve at a set point at certain design basis. The valve varies its opening based on demand. There is pressure drop that follows a curve on a graph but it is not significant within design limits, example given above. If the pressure and flow rate drop is significant, the first and obvious thing to look at is the PRV assuming the piping of the entire house is the right size. If your PRV is smaller in diameter, it will cause choke flow, hence it needs to be of the right size. So to recap: an adequately sized PRV will sustain downstream flow & pressure by varying its opening, that is the sole purpose of a PRV since the utility supplied water is over 80 psi and the PRV drops it to around 40 or so.

@@akhaqan You had incorrect pipe size.

@@sarentopi1502 No. The valve was 3/4" and undersized, wrong choice by the plumber and valve also malfunctioned. Problem was solved after putting a new PRV of 1".

@@akhaqan I am installing a 3/4 in nr3xl. So your story makes me wonder. I detected the whole story was not in the video. Now you are saying the 3/4 you had originally malfunctioned. I think you get benefits from going up to 1 inch but maybe I won't need that. Also, you just used reducers to connect the 1" prv to your 3/4" pipes? We'll see how my install goes.