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Old 02-15-2016, 07:53 AM   #1
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Grey tank sensors

My grey tank always shows either 2/3 or totally full . Any suggestions on how to clean/ fix the sensors so I know how much I have in the tank? The water seems to "trickle" out instead of pouring out when I pull the release handle. Maybe something stuck in the pipe?
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Old 02-15-2016, 08:58 AM   #2
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My grey tank always shows either 2/3 or totally full . Any suggestions on how to clean/ fix the sensors so I know how much I have in the tank? The water seems to "trickle" out instead of pouring out when I pull the release handle. Maybe something stuck in the pipe?
Our grey tank trikles out as well, takes 15 min of before it shows empty. It helps to raise the front & left side with your leveling jacks while dumping. This seems to be a common issue with ACE 29.2
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Old 02-15-2016, 11:51 AM   #3
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Thanks for the reply. We know about raising the left side. Even after the water is all out, the sensors go to 2/3. Never empty. Must be something on the sensors. Don't know how to flush the system to clean it out. Looking for a product to help out. Something like ridex but afraid to ruin the "pipes"! Otherwise, the 29.2 has been an excellent purchase for us these past 3 years and 22000 miles!
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Old 02-15-2016, 12:37 PM   #4
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Thanks for the reply. We know about raising the left side. Even after the water is all out, the sensors go to 2/3. Never empty. Must be something on the sensors. Don't know how to flush the system to clean it out. Looking for a product to help out. Something like ridex but afraid to ruin the "pipes"! Otherwise, the 29.2 has been an excellent purchase for us these past 3 years and 22000 miles!
On your next trip, try filling the tank halfway with water then squirt a small bottle of dish soap down the drain (dollar store brand works good). Should slosh around while driving, I do this at least once a year in both the black & grey tank.
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Old 02-15-2016, 05:48 PM   #5
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Yea, that tank is only 4" deep, so sensors aren't super accurate especially if it's not level. I have to raise the left like others have said to get mine fully empty. I look stupid as hell doing it, but it works on my hoopty.

I second the dish soap idea every once and a while to keep the film off the inside of the tank. I use a little dish washer soap, plain dish soap will work too. The nice thing about the dish washer soap or Tide, it doesn't suds up as much.
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Old 07-12-2016, 07:16 AM   #6
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After a trip I am fortunate to have a sewer cleanout plug in my driveway and give my black and grey a good cleaning and flush. I bring my levelers on the opposite side of the tanks down to better empty them.
I then leave my black and grey water tanks full ONLY while in storage between trips. This doesn't let anything dry on the tank sides and prevent sensors form working. My sensors now always work as should.
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