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Old 04-12-2021, 06:19 PM   #1
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2018 25' Flying Cloud
Ann Arbor , Michigan
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How to clean out the grey Tank

Hello looking for your diy ideas to clean out grey tank. We’re 18 months into full timing and the grey tank sensor is on the fritz. Tried thetford tank blaster a couple of time overnight and driving with tank 3/4 full - some crud came out but nothing compared to see below:

Last week, I ried to snake in my water heater cleaner hose attachment with a diy extension tube that points the flow backwards, but the contraption was a bit short and it was hard to figure out if I was hitting the sensor area..... But so much crud came out it boggled my mind and btw totally grossed me out as we were catching in a bucket, We do our best to keep food particles from going down and have periodically dumped clean water into sink during dumps to try to keep the tank clean but we never used grey tank treatment chems until the dons or issue.

After being traumatized by the crud monster, I’m convinced we should all have grey water flush just like black tank. Or we collectively put our thinking caps on (unless a practical genius hasn’t already solved this) and figure out a clever easy to use hose attachment or contraption that will get the job done at the dump station. I think a flush every couple of months would probably do the trick.

The camco backwater flush will not really help now perhaps others who use it regularly have avoided this issue but I doubt it as the sensor is malfunction at higher fill suggesting it is a ring 3/4 up the tank.
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Old 04-12-2021, 07:21 PM   #2
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I use Happy Camper and TankTechsRx
Neither contain harsh chemicals and are environmentally safe. Follow the directions and they work.

https://www.amazon.com/Happy-Campers...8276587&sr=8-2

https://www.amazon.com/dp/B00JFUJBTW...mcd_asin_0_img
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Old 04-12-2021, 10:45 PM   #3
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Fill both tanks (Grey & Black) about 1/2 full and add a bottle of Pinesol or Mr. Clean to each tank, let it sit over night then drive couple hundred miles so that the water sloshes around - then stop by a dump station and dump the tanks. Backwash if possible. We do this each year keeps it nice and clean... After that use the standard bio eaters...

We use strainers in the sink drains and shower to minimize food partials etc. and never start with an empty "Black" tank to avoid the pyramids sensation..
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