Pressure relief valve on water heater..

Discussion in 'The DIY corner' started by Jabroni, Mar 9, 2019.

  1. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    ..has got a drip to it.. how bad is that? I put a bucket under it to try to gauge how much its dripping a day, but it has been doing it a while from what it looks like..

    Is it worth it to just swap the valve if Im planning on swapping the tank out this summer anyway? Imminent danger?

    I would assume itd be a matter of dropping power to the tank, shutting water off, draining, etc. .?
     
  2. Mirac

    Mirac Epic Replies ---> Charter Member Supporting Member

    Joined:
    Feb 1, 2017
    Messages:
    3,856
    Likes Received:
    6,029
    Location:
    Randolph Co
    It should be replaced. No imminent danger. It's actually safer.
    the drip will get worse. And it's a serious safety feature....
    Wait, what's the water temp? Go to the nearest faucet and check the hot water temp.
     
    Me. likes this.
  3. Dave951

    Dave951 Happy to be here

    Joined:
    Jan 6, 2017
    Messages:
    1,188
    Likes Received:
    1,781
    Location:
    NC
    No eminent danger. Replace as soon as possible.
     
  4. Mikew

    Mikew Happy to be Alive

    Joined:
    Dec 18, 2016
    Messages:
    723
    Likes Received:
    773
    Location:
    High Point
    Burp it once or twice to see if it will clear.
     
  5. Catfish

    Catfish E Pluribus Mendacium Supporting Member

    Joined:
    Dec 16, 2016
    Messages:
    6,467
    Likes Received:
    11,523
    Location:
    Charlotte
    I might just step up the replacement schedule since you are just a few months away.
     
    Last edited: Mar 9, 2019
  6. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    Just checked wwter temp out of the tap. 125ish.

    How do you burp it? Just open the valve a few times to flush? Do you need to shut anything off prior?
     
  7. Catfish

    Catfish E Pluribus Mendacium Supporting Member

    Joined:
    Dec 16, 2016
    Messages:
    6,467
    Likes Received:
    11,523
    Location:
    Charlotte
    Good
    Yes
    Nope
     
  8. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    Will try burping it and see if it clears...

    The tank is atleast 10yr old, might be older, so figured this summer itd be time to swap. Done it before (its electric, so easy). Might step it up as suggested.

    Appreciate the feedback gents!
     
  9. Mirac

    Mirac Epic Replies ---> Charter Member Supporting Member

    Joined:
    Feb 1, 2017
    Messages:
    3,856
    Likes Received:
    6,029
    Location:
    Randolph Co
    0D6AE28E-8DF4-47F5-9324-5CCE717AE4A1.gif




    It’s not really, I’ve just been dying to use this gif.
     
  10. Plott Hound

    Plott Hound Active Member

    Joined:
    Dec 16, 2017
    Messages:
    660
    Likes Received:
    969
    Location:
    Beer City
    Plumber trick, pull the lever up a time or two to 'burp' it, and tap on the valve with a hammer.

    Is there an expansion tank on the water heater? When cold water heats up it expands and it has to go someplace.

    Any chance the incoming pressure is too high? In the mountains we can get some crazy high pressure. Last time my PRV on the water heater was leaking it took a new pressure reducing valve from the meter. Pressure here can be as high as 360 PSI
     
    Me. and Jabroni like this.
  11. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    No expansion tank. Never had one on any of my previous homes either...so these are a curiosity to me.

    Water pressure is unknown, but low. We are on the 2nd house from the end of the road on city water, and the house is 100yd from the meter... I wish it was a bit higher actually.
     
  12. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    Sounds good on rotating..hopefully itll do the trick.

    June/july was my original time frame for swapping. Will play by ear now. We have a few ither projects going on this spring already.
     
  13. BlackGun

    BlackGun Pimpin Ain’t Easy Supporting Member

    Joined:
    Jun 9, 2017
    Messages:
    3,933
    Likes Received:
    5,082
    Location:
    Hickory
    Every water heater needs an expansion tank on a water heater. Heated water creates pressure. Guess what happens when you don’t have one? The safety relief valve leaks. LOL.
     
  14. tanstaafl72555

    tanstaafl72555 Permanently banned due to forum abuse Life Member

    Joined:
    Mar 1, 2017
    Messages:
    3,141
    Likes Received:
    4,489
    Swap the valve. It is idiot proof to do (I can teach my wife to do it in 20 mins or less, and she is super mechanically uninclined., and if you are leaking, you need it anyway
     
  15. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    Weird..never owned a house with one..
     
  16. Mikew

    Mikew Happy to be Alive

    Joined:
    Dec 18, 2016
    Messages:
    723
    Likes Received:
    773
    Location:
    High Point
    Sometimes old ain't bad, if it ain't leaking I'd leave it alone, the one you replace it with might have a cracked liner from being dropped at the factory or in transport and rust out in two years. Just my two cents on replacing it.
     
  17. BlackGun

    BlackGun Pimpin Ain’t Easy Supporting Member

    Joined:
    Jun 9, 2017
    Messages:
    3,933
    Likes Received:
    5,082
    Location:
    Hickory
    Didn’t have one on my home when I moved in. Some contractors cheapen the job. There’s one now.
     
  18. Friday

    Friday Polite-Knock raid Charter Member Supporting Member

    Joined:
    Dec 19, 2016
    Messages:
    3,372
    Likes Received:
    6,755
    Location:
    Worlds Edge WNC
    Expansion tanks are standard equipment on water heaters in new houses now, at least with the builders I work with.
    It doesn't add that much cost to the new heater. It's either something the plumbers do for that added touch, the builder insists on it, or more likely...I think it's code now. I'll ask the plumbers next time I see them.

    I recently wired in a new Barber shop. The plumbers I never worked with before. They put the WH over the bathroom in a tiny attic/closet and had to use a shorty 40 gallon. It was tight. So they proceed to plumb the expansion tank right over the electrical junction box on top of the heater. Right on it! No way to get the cover off and wire it up. Genius.
     
    Last edited: Mar 11, 2019
    Me. likes this.
  19. rdinatal

    rdinatal Better late then never...

    Joined:
    Dec 28, 2016
    Messages:
    5,038
    Likes Received:
    7,462
    Location:
    Lake Normanopolis, NC
    It's county code in Meck Co for a while now.
     
    Button Pusher and Me. like this.
  20. Friday

    Friday Polite-Knock raid Charter Member Supporting Member

    Joined:
    Dec 19, 2016
    Messages:
    3,372
    Likes Received:
    6,755
    Location:
    Worlds Edge WNC
    I figured it was a code thingy. Plumbers are not well known for adding things just because. Water comes out of faucet, drains downhill. Done.
     
  21. rdinatal

    rdinatal Better late then never...

    Joined:
    Dec 28, 2016
    Messages:
    5,038
    Likes Received:
    7,462
    Location:
    Lake Normanopolis, NC
    Yeah, sometimes you can't get around "code" and the paperwork associated with it.
     
  22. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    Tried flushing the valve a few times, but no go. Think Ill swap it out this weekend and figure out where the heck I can mount a expansion tank, might do that prior to water heater swap and just do the swap of tank out in a few months as planned.
     
    BlackGun, Me. and Mirac like this.
  23. Jabroni

    Jabroni Active Member Supporting Member

    Joined:
    Mar 4, 2017
    Messages:
    805
    Likes Received:
    606
    Location:
    Purlear, NC
    Swapped the valve today..stupid easy. No more leaks. :)
     
    Mirac, Mikew and Me. like this.
  24. DC Bigdaddy

    DC Bigdaddy Fat and Happy

    Joined:
    Dec 19, 2016
    Messages:
    251
    Likes Received:
    237
    Location:
    Beulaville, NC
    I had to put an expansion tank on my house this winter. PRV just started to leak. I changed it, it still leaked, I changed the thermostats, it still leaked, I changed the elements, it still leaked, I put a 3rd PRV on it, it still leaked. Plumber installed an expansion tank, It stopped leaking. House is 17 years old, it didn't have a expansion tank. They are required by code now.
     
    Me. and Button Pusher like this.
  25. MacEntyre

    MacEntyre Shoot on Sight! Charter Member Vendor

    Joined:
    Jan 3, 2017
    Messages:
    4,098
    Likes Received:
    6,693
    Location:
    under a rock on the East Fork of Deep River, NC
    Sometimes? :confused:
     
  26. noway2

    noway2 Senior Member Charter Life Member

    Joined:
    Dec 16, 2016
    Messages:
    9,260
    Likes Received:
    14,221
    Location:
    Onboard the mothership
    Friend showed me that trick recently. The PRV on the water heater on my travel trailer was dripping, so I jiggled the lever. Mistake. It started running and I couldn’t get it stopped. The trick of bumping it worked. He said after we get home, he’ll come over with the tool and show me how to replace it.
     
    Me. likes this.
  27. jodyisaacs

    jodyisaacs Active Member

    Joined:
    Oct 1, 2017
    Messages:
    468
    Likes Received:
    498
    Location:
    US
    Have a gas water heater with the same issue. Replaced PRV and it still leaked. After watching it, I saw that it only leaked when it was heating.... DING DING DING... no expansion tank installed. That was the issue! The expanding water has to go somewhere.

    Sent from my SM-N975U using Tapatalk