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Old 07-26-2016, 03:56 PM   #15
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1954 25' Cruiser
Bern - Thun , Berner Oberland
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In my Cruiser was almost new geel battery , she was greatly inflated . Had to be replaced ...

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Old 07-27-2016, 06:34 AM   #16
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2001 25' Safari
Asheboro , North Carolina
Join Date: Jul 2016
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sewer stink behind kitchen sink base

We flushed out our "clean out" (partially filled and enzyme treated) black water tank and refilled to the brim with clean water and more enzyme. There is no smell at the moment. We are hoping for a really deep clean. Letting it sit for several more days. If the problem continues we will first swap out the vent which is located behind the kitchen sink, which is the area we traced to smell from.

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Old 07-27-2016, 08:09 AM   #17
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1966 20' Globetrotter
1985 25' Sovereign
johnsoncity , Tennessee
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Shopkeepers when you drain your tank. Add one box of baking soda and four regular (365) Bayer aspirins plus one or two gallons of water. No enzymes
Should be good to go
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Old 07-27-2016, 09:58 AM   #18
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2015 27' FB International
Dallas , Texas
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I'm glad to see this thread b/c I've been meaning to inquire as well. Pretty much every time we empty our black tanks, we get a horrible sewer smell in the trailer in the vicinity of the bathroom. After we empty the black tank, we typically do a black tank clean out/flush with fresh water to about 70+ % and then empty gray tanks last, but the smell starts as soon as you begin emptying the black tank. It permeates the bathroom & into the bedroom inside the trailer, but then always dissipates so the next time we go to use the trailer, everything smells good and normal inside.

Is this normal? Any ideas? Are we doing something incorrectly that we need to change?

Much appreciate your input!
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Old 07-28-2016, 02:06 PM   #19
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2005 19' Safari
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Re: Controlling Black & Grey Tank Odors

Summer heat promotes bacteria growth and outgassing in black and grey tanks. Running FantasticFans and exhaust fans full blast to exhaust the bad odors just sucks more smelly gasses up from the drains and toilet. This is especially evident in the desert southwest heat (currently 110+ degrees).

We use these these products to control waste tank odors:
  • Campa Chem Liquid Holding Tank Deodorant -- Start with 8 ounces in the black tank, and add more as necessary, as the tank fills.

    Note: This is the same blue chemical used in toilets on airliners, boats, trains, etc.

  • Camco TST Orange Power -- When camping, add 2-3 ounces to each sink and shower drain, as necessary. Just before storage, repeat; but leave deodorant in trap (i.e., do not flush drain with water after adding deodorant).
For those who wish to avoid harsh chemicals, there are "greener" versions of these products that work almost as well; although, most are significantly less effective in extreme heat.

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