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Old 10-28-2013, 12:57 PM   #1
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Gray Water Tank

Can anyone tell of a good product to deodorize a gray water tank. After awhile it seems to smell as bad as my black water tank which I back flush every time I leave a campground.

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Old 10-28-2013, 01:03 PM   #2
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Pine cleaners, any brand, just an ounce or three should have it hospital fresh.

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Old 10-28-2013, 01:04 PM   #3
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Originally Posted by Pat F View Post
Can anyone tell of a good product to deodorize a gray water tank. After awhile it seems to smell as bad as my black water tank which I back flush every time I leave a campground.
Maybe I am missing something but where do you smell the odor of the grey tank? I have a similar situation in our washing machine. I can smell grey tank odor in it but no where else in the coach. I am thinking that it may not have a proper P-trap. I even smell this with the grey tank valve closed AND adding a Ptrap to my sewer hose.

I guess, in a round about way, I am wondering where you are smelling your grey tank since you should have Ptraps to stop that from happening. Maybe I am lucky and don't have that problem at any other potential source of odor.
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Old 10-28-2013, 01:09 PM   #4
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Try Pine Power. You can get a big bottle from the Dollar General store.

Below is an example of what it looks like.

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Old 10-28-2013, 01:12 PM   #5
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You could try sanitizing it the same as you would the fresh water. Make sure you avoid as much food debris and grease as possible down the drain.

I like the idea of PineSol type cleaner, but the pine smell might be too much.
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Old 10-28-2013, 01:25 PM   #6
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As mentioned before, if your traps are working properly you shouldn't smell anything. That said, grey water tanks do build up an amount of solid waste and probably could benefit from an enzyme cleaner as well. We use Walex Elemonate just in case.
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Old 10-28-2013, 01:55 PM   #7
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To clean a gray water holding tank when hooked to full hookup:
Empty gray holding tank and close tank valve.
Then mix two tablespoons of Happy Campers Tank Treatment (53 cents) in a gallon of water for every 40 gallons of gray tank capacity. Drain mix into tank.
Finish filling with fresh water until you see it coming up into the shower drain.
Let it sit overnight.
Empty in the morning.
Very smelly stuff seems to grow on the tops of gray tanks and this will clean it off.

To maintain an odor free gray tank and working sensor:
Mix one tablespoon of Happy Campers Tank Treatment (27 cents) in some water and wash it down the kitchen sink or shower drain. I do this once every three months.

Keep water in your drain traps.
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Old 10-29-2013, 11:11 AM   #8
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Smell is mostly around washer/dryer when gray water tank is at high capacity. Will try Pine Sol treatment first. Thanks to everyone for your input.
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Old 10-29-2013, 11:38 AM   #9
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If you have a front loading washer, it may need to be cleaned. These types of washers hold water and over time can really get smelly. Look in your manual to see what is the recommended method for cleaning. I use a tablet specifically made to clean the washer. You may be able to just a run a cycle with bleach. I also leave the washer door cracked and the soap dispenser open to help dry out the washer. See if this helps since you have the odor even with the gray tank valve closed.

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