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Old 08-13-2015, 01:01 PM   #1
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Black Tank Flush

Hello all! I was wondering if it's safe to us my fresh water hose to plug up to the little hose adapter on the TT to spray the inside and wash out the black tank? Any chance of dirty black water stuff getting back on the fresh water hose?
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Karl
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Old 08-13-2015, 06:01 PM   #2
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I don't know if there is a back flow device in the black flush or not. Do not risk it!! Buy another hose (regular garden hose) for the black flush and don't store it with your white drinking water hoses. Better safe than sorry!

Bob
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Old 08-13-2015, 06:35 PM   #3
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I don't know if there is a back flow device in the black flush or not. Do not risk it!! Buy another hose (regular garden hose) for the black flush and don't store it with your white drinking water hoses. Better safe than sorry!

Bob

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Old 08-13-2015, 06:41 PM   #4
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Not only do I use a dedicated black hose for flushing, as a further precaution I use a brass back flow preventer on the fresh water faucet while flushing. And when finished I spray the faucet and everything else with a sanitizing solution.
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Old 08-13-2015, 10:04 PM   #5
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Not only do I use a dedicated black hose for flushing, as a further precaution I use a brass back flow preventer on the fresh water faucet while flushing. And when finished I spray the faucet and everything else with a sanitizing solution.

What purpose does that serve? The black tank is completely isolated from the fresh water. I don't know how one could even contaminate the fresh water while flushing. Just my thoughts.
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Old 08-14-2015, 08:51 AM   #6
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So, Bubbles and Biznsa, do you use your freshwater hose to flush the black tank...or would that be ignorant?
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Old 08-14-2015, 09:04 AM   #7
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I carry two hoses, a cheap white one (I call it the kinkmaster) and a good quality 35' blue one from Walmart. Something about hooking up my drinking water hose to the black tank fitting just doesn't appeal to me.
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Old 08-14-2015, 09:32 AM   #8
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So, Bubbles and Biznsa, do you use your freshwater hose to flush the black tank...or would that be ignorant?
Wasn't refering to the use of a seperate hose just your hookup and post usage. The cleanout plumbing is routed from the input to a backflow preventer that is elevated 3 to 5 feet above your black tank and then down to the black tank. The black tank is vented and therefore no backflow can occur (blackflow preventer probably not needed but installed per some code). The only residual water that can flow back through the input hose is the fresh water within the hose and plumbing from the input side of the backflow preventer. Your use of a backflow preventer is thusly redundent and disenfectant spraying is? Additionally, though it sounds bad the use of any fresh water hose to also cleanout the black tank will not cause any issues. These comments are of course predicated upon a FR factory installed black tank cleanout and functioning as designed. I'm done.
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Old 08-15-2015, 07:52 AM   #9
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I use my outside shower and hook it up to the black flush, that way I can flush out the black tank with hot water, works for me


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Old 08-15-2015, 08:27 AM   #10
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I'm amazed that some folks even use the same water spigot for both hoses.
I bet if you looked inside you will find your toilet is hooked up to the fresh water line.
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