Tankless electric water heater makes noise

Discussion in 'Water Heaters and Softeners' started by robertbarnes, Jul 1, 2019.

Help Support Plumbing Forums by donating:

  1. Jul 1, 2019 #1

    robertbarnes

    robertbarnes

    robertbarnes

    Member

    Joined:
    Nov 20, 2011
    Messages:
    24
    Likes Received:
    0
    Location:
    ,
    I bought a home and the hot water tank was rusted out so I decided to install a tankless water heater. I installed it and it works but after about 3 months i started to hear a loud banging noise when the water was in use. I researched it and most people said it was jackhammering, i think that was the term, and that I had air in the lines. I am wondering how do I fix this if it is air in the lines and if it could be something different than air since it did not do that for the first 3 months.

    Thank you for any help
     
  2. Jul 2, 2019 #2

    FishScreener

    FishScreener

    FishScreener

    Well-Known Member

    Joined:
    Aug 23, 2018
    Messages:
    312
    Likes Received:
    88
    Location:
    83467
    There is air disolved in the water, and it comes out over time. If you have high spots in the line it collects there. And, may be very difficult to remove.
     
    robertbarnes likes this.
  3. Jul 2, 2019 #3

    robertbarnes

    robertbarnes

    robertbarnes

    Member

    Joined:
    Nov 20, 2011
    Messages:
    24
    Likes Received:
    0
    Location:
    ,
    the water heater is the high spot in my house, i think. do know how i can get the air out?
     
  4. Aug 28, 2019 #4

    whatchawant17

    whatchawant17

    whatchawant17

    Active Member

    Joined:
    Aug 28, 2019
    Messages:
    26
    Likes Received:
    2
    Location:
    US
    Is the banging coming from the water pipes or the exhaust pipe from the unit? I just put in a tankless navien 3 months ago and made a post now here because I started hearing an occasional pop coming out of the exhaust vent when the unit turns on. Most of the time it sounds normal, but once or twice a day now I started noticing it when the unit turns on or enters re circulation mode.
     
  5. Aug 29, 2019 #5

    voletl

    voletl

    voletl

    Well-Known Member

    Joined:
    Dec 18, 2014
    Messages:
    715
    Likes Received:
    221
    Location:
    New York
    Electric water heaters don't have exhaust
     
  6. Aug 29, 2019 #6

    whatchawant17

    whatchawant17

    whatchawant17

    Active Member

    Joined:
    Aug 28, 2019
    Messages:
    26
    Likes Received:
    2
    Location:
    US
    Ah very true. I missed the electric part.
     
  7. Aug 29, 2019 #7

    wood4d

    wood4d

    wood4d

    Well-Known Member

    Joined:
    Apr 1, 2014
    Messages:
    135
    Likes Received:
    21
    Location:
    ,
    electric???
     
  8. Sep 2, 2019 #8

    TomFOhio

    TomFOhio

    TomFOhio

    Professional Professional

    Joined:
    Jan 20, 2018
    Messages:
    929
    Likes Received:
    202
    Location:
    Mansfield,, Ohio
    Is it gas or electric?????
     
  9. Sep 2, 2019 #9

    voletl

    voletl

    voletl

    Well-Known Member

    Joined:
    Dec 18, 2014
    Messages:
    715
    Likes Received:
    221
    Location:
    New York
    The title says electric water heater.......
     
  10. Sep 2, 2019 #10

    wood4d

    wood4d

    wood4d

    Well-Known Member

    Joined:
    Apr 1, 2014
    Messages:
    135
    Likes Received:
    21
    Location:
    ,
    this is a post from early july
     
  11. Sep 3, 2019 #11

    TomFOhio

    TomFOhio

    TomFOhio

    Professional Professional

    Joined:
    Jan 20, 2018
    Messages:
    929
    Likes Received:
    202
    Location:
    Mansfield,, Ohio
    Wow, that went right over my head.......
     

Share This Page