Fresh water tank ordor

Discussion in 'General Discussion' started by Zach312, Jun 22, 2019.

  1. Zach312

    Zach312 Active Member

    515
    Jan 23, 2011
    Hudson, WI
    2008 Sea Ray 48 Sundancer
    Cummins QSC 540's
    Does any one have a procedure to disinfect the fresh water tank. Haven't been to the boat in two weeks and have some funky smells coming from fresh water tank. Would like to flush and sanitize/disinfect tomorrow

    Thanks in advance
     
  2. Zach312

    Zach312 Active Member

    515
    Jan 23, 2011
    Hudson, WI
    2008 Sea Ray 48 Sundancer
    Cummins QSC 540's
    Also it is isolated to the "hot" water only. If a faucet is running cold water then their is no odor.

    We did note that there was some residual "pink" antifreeze in the system this spring which the marina informed us was from the hot water system not properly being bypassed during winterization.
     
  3. Ferris

    Ferris Member

    73
    Feb 8, 2018
    Highlands NJ
    280 Sundancer 2001
    2x 4.3L Mercruisers
    It's a common problem for unused hot water tanks not just on boats but in vacation homes, RV etc too.

    If you can drain it, and add a bit of hydrogen peroxide it should fix it.
     
  4. Sublimetime

    Sublimetime Active Member

    656
    Oct 22, 2007
    clifton nj
    420 da
    454
    Just keep flushing it out with fresh water. The more the better.
     
    JVM225 likes this.
  5. Jeremygavin

    Jeremygavin Well-Known Member SILVER Sponsor

    Mar 6, 2012
    Cape Cod, MA
    2011 520 Sedan Bridge
    2016 Sea Ray 19 SPX OB
    2019 Walker Bay Generation 340
    Cummins QSM11s
    Mercury 150 Fourstroke
    Honda 40hp
    I used the west marine water tank flush last fall on my 520DB system.

    https://www.westmarine.com/buy/west-marine--water-tank-flush-cleaner--14044424?recordNum=2

    When we had the sea trial last fall we all had to leave the cabin after running any of the faucets it smelled so bad. PO didn’t use the boat too much over the summer. The treatment worked well (I flushed the tank and all faucets 5-6 times) and now I continue to put in a daily treatment each time I fill the water tank. No orders at all. I am sure the west marine chemicals can be had cheaper using something no name but I had good results with them

    https://www.westmarine.com/buy/west-marine--water-treatment-and-freshener-16oz--16731374?recordNum=1
     
  6. stme1234

    stme1234 New Member

    26
    Jul 8, 2017
    Warwick RI
    2017 SeaRay 51 FLY
    Cumming QSM11-715 diesel
    Like Jeremy said keep flushing with the West marine treatments or our brand. This same thing happened to me on a boat that sat for a year+ untreated.

    The last resort is a touch bleach not recommended but it will work.

    The important thing is to use the tank all the time and keep putting in the water treatments. It will go away.

    Also, put a water filter on your fill water too.
     
  7. stme1234

    stme1234 New Member

    26
    Jul 8, 2017
    Warwick RI
    2017 SeaRay 51 FLY
    Cumming QSM11-715 diesel
    I also like using this too after you get the odor out

    11247562-A283-42CD-A72C-CD2FB77D83B9.png
     
  8. Zach312

    Zach312 Active Member

    515
    Jan 23, 2011
    Hudson, WI
    2008 Sea Ray 48 Sundancer
    Cummins QSC 540's
    Thanks guys

    Will report back next week. Tried the west marine route. It has initially cleared up
     
  9. jssearay

    jssearay Active Member

    108
    Mar 7, 2019
    central ohio
    1998 sea ray 215 express cruiser
    5.7 mercruiser w/alpha 1, trailer boat, fresh water usage
    we don't use the water tank in our 215 ec, but we have a motorhome that sometimes has the same issue..........easiest way, if you have a way to drain the freshwater tank and hot water tanks, is to drain hot water tank, fill fresh water until almost full, add 1/4 cup of regular clorox to each 15 gallons of fresh water tank volume........run water thru system until you smell bleach at faucets, let sit at least 4 hours (overnight works best), drain everything, rinse, and refill tanks with fresh water........we did this to our bus just last week, very little effort...............now, fresh and clean for upcoming adventure................
     

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