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  1. #1
    Join Date
    Feb 2009
    Posts
    6

    Default Low hot water pressure?

    I have low water pressure on all of my hot fixtures for the last few days. This happened about month ago, but seemed to fix itself. I have turned the suppy on and off, turned the gas on and off, with no results. Our gas hot water heater is only one year old.

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,302

    Default Re: Low hot water pressure?

    Tell us something about your water pipes, if you can.

    Like: what kind of pipes and how old?

  3. #3
    Join Date
    Feb 2009
    Posts
    6

    Default Re: Low hot water pressure?

    Copper pipes about 20 years old.

  4. #4
    Join Date
    Dec 2007
    Location
    Tennessee
    Posts
    1,681

    Default Re: Low hot water pressure?

    Here's my SWAG for your problem based on that it is intermittent and affects all faucets. You have a gate valve in the inlet pipe (cold water pipe) to the water heater. Its there to allow the water heater to be changed/services without shutting off cold water to the rest of the house. The rubber seal has deteriorated and come loose and is partially blocking the water going into the water heater.

    It should be an easy fix, you shut off the water to the whole house. You use a wrench to remove the stem from the gate valve and you replace the rubber washer at the bottom of the stem, then reassemble. At this age, you might need to replace the stem washer/seal as well.

  5. #5
    Join Date
    Feb 2010
    Location
    South*East
    Posts
    1,208

    Default Re: Low hot water pressure?

    Quote Originally Posted by keith3267 View Post
    Here's my SWAG for your problem based on that it is intermittent and affects all faucets. You have a gate valve in the inlet pipe (cold water pipe) to the water heater. Its there to allow the water heater to be changed/services without shutting off cold water to the rest of the house. The rubber seal has deteriorated and come loose and is partially blocking the water going into the water heater.

    It should be an easy fix, you shut off the water to the whole house. You use a wrench to remove the stem from the gate valve and you replace the rubber washer at the bottom of the stem, then reassemble. At this age, you might need to replace the stem washer/seal as well.
    Gate valves don't have rubber washers. They have a brass gate that closes off the water. That's the reason they call them gate valves.

    John

  6. #6
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,916

    Default Re: Low hot water pressure?

    Make sure they are pointed in the right direction. If in doubt, replace them.

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