Watts 2" Pressure Reducer Problem

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by winesalot, Jun 16, 2019.

  1. winesalot

    winesalot Member

    Joined:
    Nov 7, 2017
    Location:
    Chelan, WA
    i have a Watts 2" Pressure Reducer that worked perfectly last year but this year I cannot adjust pressure. I seems to work perfectly at 20 psi but when I tighten the adjustment bolt/spring downstream pressure does not increase. I have disassembled and checked all the internal components and nothing seems to be amiss. Does anyone have any experience or thoughts on this issue?
     
    Last edited: Jun 16, 2019
  2. OLD TIMER

    OLD TIMER Member

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    May 18, 2019
    Location:
    FLORIDA
    Are you sure the gauge is not stuck?
     
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  4. winesalot

    winesalot Member

    Joined:
    Nov 7, 2017
    Location:
    Chelan, WA
    Yes, I broke the old one so it is brand new. Also, the pressure is obviously low because the sprinklers attached are not achieving normal water distance.
     
  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Clog of some sort upstream or in the screen for the PRV? This presumes the water goes to the sprinklers while you are measuring the pressure.

    Can you measure the incoming pressure to the PRV while the sprinklers are running?

    You might want to say what model you have if that is not the problem.
     
    Last edited: Jun 16, 2019
  6. OLD TIMER

    OLD TIMER Member

    Joined:
    May 18, 2019
    Location:
    FLORIDA
    You can call the city water utility department and they will verify your water pressure up to your meter. if its low and complain they
    will replace it. unless your on a well.
    look for signs of a water break on the ground, puddles. if you have a hose bib that's before the prv you can connect a 5 dollar pressure gauge
    that connects to a hose bib and check the pressure.
     
  7. winesalot

    winesalot Member

    Joined:
    Nov 7, 2017
    Location:
    Chelan, WA
    Thanks so much for jumping in with some great points and questions.

    Here is more information: The valve is a Watts LF25AUB -Z3 2" Details can be found on this page (https://www.watts.com/products/plum...ves/water-pressure-reducing-valves/lf25aub-z3).

    My system is supplied from an unmetered 2" line coming of a Reclamation District main header. I have a 2" ball valve at the main connection then 600 feet of 2" line dropping 100' in elevation to a second 2" ball valve then the pressure regulator followed by a couple of 3/4" tee's and three hose connections. This is all a temporary setup until we put in the irrigation/sprinkler system after the winery is built. Last year I had 85 psi at the line in and the 40' of head increase gave me 125 psi at the pressure regulator. I don't currently have a connection on the upstream side or the PR to measure pressure but since I have water flow and the 100' elevation change physics says I have to have a minimum of 40 psi at the PR and it's highly likely a lot more than that. I do know that when I accidentally opened the 2" ball valve just before the PR and blasted a huge trench in a pile of dirt si I am confident I have unrestricted flow at a fairly high pressure to the PR valve. The internal inlet screen is clean.

    Today I tried it a gain and it seems to be working normally but at the lower pressure. When I slightly open one of the hose bibs pressure drops down to zero then quickly recovers to 20. When I open the hose bib fully pressure drops to zero with good water flow. When I close the hose bib pressure bounces up to 30 psi or so then settle in at 20. All would, in my mind, be expected if pressure is set at 20 psi. When I tighten adjusting screw and subsequently the internal spring I would expect the output pressure to increase but it doesn't.
     
  8. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
  9. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    Yeah that valve has a built in strainer, which is probably clogged. Those direct acting PRV's usually fail in the open position, not closed. So either the strainer is clogged or the main spring is broken.
     
  10. winesalot

    winesalot Member

    Joined:
    Nov 7, 2017
    Location:
    Chelan, WA
    Yesterday afternoon I learned that a neighbor had been doing some work on his property and damaged the 4" main line that feeds all of our properties. Turns out my flow to the property was severely restricted thus my issue. Repair to the pipe was made and I am back in business. Thanks everyone for the help.
     
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