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Thread: thermal expansion

  1. #1
    DIY Member ally68's Avatar
    Join Date
    Jan 2005
    Location
    Missouri
    Posts
    67

    Default thermal expansion

    I have some thermal expansion my pressure sits under 50 psi and never gets over 80 psi when heater is on and back down to 55 or 60 when it shuts off. One time I ran all the hot water out and let it heat up with out using the water and it only got to about 85 psi for about 5 minutes before it started back dwon to 60 psi should I worry?

    I really dont want to install anything.

    Thanks

  2. #2
    Plumber Plumber2000's Avatar
    Join Date
    Jan 2005
    Location
    Eugene, Oregon
    Posts
    196

    Default

    You should be fine, if you have a constant pressure above 80 then a pressure reducer valve would be needed.
    Plumber for 20+years

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