DIY Replace PRV

[Mark Frankmann]

I recently had a Moen Flo Control installed. Now it is sending alert that my home water pressure is too high. It get's above 90 psi at night. We were gone for 24 hours at Thanksgiving and the report showed the pressure holding steady at @ 90psi for the entire period. I read on internet a PRV should be replaced every 3-5 years. Mine is at least 20 years old, maybe older.

The water needed to be turned off at the curb stop at the street then cut into the main water line into my house in crawl space, replace old main shut off gate valve w new ball valve, cut pipe and remove town water meter and PRV move those down and then install Moen Flo Control above PRV and below my irrigation backflow preventer and town check valve.

I have some experience with DIY plumbing but I am not a pro. I have installed a shower valve, tankless water heater and other re-model type plumbing. Since it is winter, I am pretty busy, GF does not want to be without water for an extended time if problem arises (which is common for me) I managed to find a plumbing contractor who agreed todo it (it's so busy here most won't answer the phone or return calls).

The guy who came was excellent and it took @ 2hours. No problems with the work done. I was disappointed that they did not recommend replacing the PRV at that time since we had it out. I had no idea they went bad but it seems self evident now.

So I need to replace the PRV. The plumber claims he recommended it be replaced. I did not want to argue because it needs to be replaced regardless. I know he never mentioned it and the guy he sent over todo the work never mentioned it. If they had I would have for sure agreed.

Because of this and also to save some $ I am considering replacing it myself. Photos attached show the situation.

1)It appears that it's a threaded NPT fitting on both sides and all I would need to do is disconnect each union and put a new one in?

2)Would I need the exact same model to ensure the space between the water meter below and Moen FLO Control above did not need to change?

3)Can you tell from my photos what valve and associated specs (in/out connections) I would need to order?

Thanks in advance for any help.

 

[CT-18]

Yes i would order another Wilkens/Zurn and the model number should be on that tag. To me it looks like 3/4" but its hard to tell. Some of the house guys should be able to help you.

 

[Mark Frankmann]

Hi and thanks for your reply. Yes it is a 3/4". The model # is etched into the tag and very difficult to make out but it appears to be 610 ULR.

Other tag info, Man. Date - 0617, Range 10-125, Max Inlet - 400

The closest one I can find is this:
https://www.amazon.com/Zurn-112-600XL-Lead-Free-Union-Pressure/dp/B07RJ21PWW

I'm thinking I would turn the lower brass union nut down to detach the bottom end. Then turn/unscrew the PRV from the threaded end of the copper pipe at the top end?

To replace the lower union appears to be tapered NPT so no thread tape or pipe dope?

Use thread tape with some pipe dope added on top of the tape for the upper connection?

On Zurn website I see repair kit. Not sure if that's a viable alternative? If yes this seems like a good way to go?
https://www.zurn.com/products/repai...arts-and-repair-kits-(includes-stra/rk1-600xl

 

[havasu]

I've had my house for 10 years, and already on my 3rd PRV. Remove your PRV, match it up at a plumbing supply house, and reinstall it. I don't recommend dealing with the repair kit, especially since it has given you all those years of service.