Bang or Ping in water heater

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Plumbcatastrophe, Jan 22, 2006.

  1. Plumbcatastrophe

    Plumbcatastrophe New Member

    Messages:
    17
    I looked at some old threads and I'm not sure if I'm on the right track. I get a "bang" in the water heater, one only, as it nears its heating cycle, when I turn a valve off (like the sink or shower), or sometimes while it's just sitting there doing what water heaters do. It's an envirotech water heater and only 4 years old. Super hard water that leaves stains on glass and vehicles I can't remove. I've flushed several times. Installed a H20 pressure regulator, I have an arrestor on the hot line below tank and cold line by the outlet to sprinkler system. Anyone had anything similar? Is it the tank and buildup? Any ideas? I'm thinking of replacing tank next, but eliminating by removing appliances is expensive!
    Last edited: Jan 22, 2006
  2. plumber1

    plumber1 Plumber

    Messages:
    1,423
    Location:
    Florida
    Are we talking a natural gas water heater?
  3. Plumbcatastrophe

    Plumbcatastrophe New Member

    Messages:
    17
    Type of water heater

    It's a propane monster.
  4. plumber1

    plumber1 Plumber

    Messages:
    1,423
    Location:
    Florida
    w/h noise

    You will get a better explaination from someone, but the bottom of the water heater is like the bottom of a tea kettle and the elements that are in the water settle out to the bottom. Some of the oxygen or air gets trapped and will pop when water begins to heat. Some heaters sound like a popcorn popper.
  5. Bob NH

    Bob NH In the Trades

    Messages:
    3,317
    Location:
    New Hampshire
    Get a Softener

    You will probably have short life on water heaters until you install a water softener, based on a water test.

    The problem arises from the fact that calcium carbonate precipitates when the water gets hot. That is why teakettles get thick crusts in the bottom.

    The cause of the popping is steam bubbles that are created where the flame heats the metal that is somewhat insulated on the inside by the deposits. The creation and collapse of those steam bubbles is what makes the noise.

    Just as you can clean your teakettle by boiling a little vinegar in it, you could clean a water heater by circulating a muriatic acid solution through it. That is a solution that many homeowners might not want to undertake.

    You could circulate the acid solution using a "drill pump", or better yet, a small centrifugal utility pump.
  6. plumber1

    plumber1 Plumber

    Messages:
    1,423
    Location:
    Florida
    I would live with it or replace it.
  7. banging in heater

    it is probably what everyone else has alaready stated...


    I have run into where the baffle going up the chimmney
    expands and contracts when it ti heated and makes a
    slight banging noise too. try spinnning the baffel in the
    chimmney and see if it helps...
  8. Plumbcatastrophe

    Plumbcatastrophe New Member

    Messages:
    17
    Water heater bang

    Guess it just sounded so unusual because it sometimes happens when you shut down a cold water line. Makes no sense.
Similar Threads: Bang Ping
Forum Title Date
Plumbing Forum, Professional & DIY Advice Heating not turned on during summer , banging and clanging from pipes Oct 29, 2014
Plumbing Forum, Professional & DIY Advice Banging pipes when running outdoor spigot. Darn kids.... Aug 25, 2014
Plumbing Forum, Professional & DIY Advice Banging pipes from sump pump Jun 14, 2014
Plumbing Forum, Professional & DIY Advice New Banging Noise Apr 24, 2014
Plumbing Forum, Professional & DIY Advice Bang/pop noise in drains after dark Oct 29, 2013

Share This Page