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Thread: Pressure Reducing Valve Noise

  1. #1

    Default Pressure Reducing Valve Noise

    Hi Everyone,

    I moved into a reasonably new (2-3 years old) rental apartment about a year ago now. Recently started to be kept awake at night by periodic, loud, creaking noise which is coming from the plumbing.

    Well tonight I decided to investigate and as far as I can tell the source is what I believe to be a HoneyWell Pressure Reducing Valve (looks like this).

    A quick Google revealed this data on a similar HoneyWell valve. The troubleshooting section seems to suggest tweaking the outlet pressure to resolve problems with "whistling" noises.

    Although I'm no expert, I'm keen to attempt resolving this problem myself as it will take my landlord about a month if I leave it to him(based upon past experience).

    So my questions are:
    1. Is it likely that varying the outlet pressue will fix my creaking problem?
    2. Is there any potential damage I could cause by attempting this?

    Based upon the product data for this valve, altering the outlet pressure looks reasonably simple.

    Any help received is very greatly appreciated.


  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    Is there an expansion tank in the water line near your water heater? If not, that is likely the problem. As an experiment, buy a water pressure gauge (around $10) and screw it into the drain of the WH or somewhere else you can easily attach it. When things are making noises, check the pressure. If you have a PRV and don't have an expansion tank, after running the hot water, the water expands, creating a potentialy very high pressure. This can make the prv make noise sometimes. The PRV has an internal check valve causing the system to be referred to as a closed system. A closed system needs room for the water to expand as it gets heated.
    Last edited by jadnashua; 02-11-2007 at 04:33 PM.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014


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