Braukmann D05 Pressure Valve - Bonnet Removal

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by proxybox, Oct 20, 2005.

  1. proxybox

    proxybox New Member

    Mar 4, 2005
    Los Angeles, CA

    I have the Braukmann D05 pressure reducing valve ( ) and I need to replace the internal cartridge because the pressure is not holding properly. Unfortunately, the bonnet is very difficult ot break. I used various lubricating sprays, open ended wrench, pipe wrench, Crescent Wrench and nothing seems to want to make this thing budge. When I put a pipe wrench on the bonnet, the material buckles because it is made out of plastic.

    Does anybody have any suggestions on which tool to use to break the seal?


  2. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    Most plumbers just replace the PRV valves.

    I think you would be better off in the long run doing that too.
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  4. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    I believe the success rate of repairing PRV in domestic water systems is low. Too much stuff in the water, so internal parts are limed up or eroded. This opinion is biased somewhat by the economic aspect: A plumber cannot spend an hour trying to repair a valve, only to find the repair isn't successful. He can replace the valve in much less time.

    As a DIY homeowner, you are willing to invest your own time, and we do not object. We are trying to point out, and actually you have already discovered, some of the pitfalls.

    You will need a large wrench to turn the bonnet. You must also use a large wrench to hold-back on the body, so the pipes are not damaged. Eventually, it has to turn. It may or may not be damaged in the process, so don't do this on Sunday afternoon when no supply houses are open.
  5. proxybox

    proxybox New Member

    Mar 4, 2005
    Los Angeles, CA
    Thanks for the tips. I am late to reply but I was able to get the bonnet off. I went to a rental supply store and got a socket wrench that was the same size. Once I got the socket on there, the bonnet came off with no problem. I saw the same socket wrench at Sears. They cost about $15.00.
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