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Old 10-07-2015, 10:57 PM   #1
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How to fix

Leaking black water tank senser
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Old 10-07-2015, 11:15 PM   #2
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Some are a screw and nut through a rubber grommet. Tightening the screw can squeeze the grommet and stop the leak. Others are just a screw through the plastic wall of the tank. In that case I'd dump the tank, then loosen the screw, apply sealant around the head and threads, then tighten it back up.
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Old 10-08-2015, 07:14 AM   #3
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will try to right the ship here and get back on track, [moderator edit]. so how do you access the interior of the black tank to install a replacement or tighten the existing sensor?
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Old 10-08-2015, 07:43 AM   #4
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About the only style tank sensors that can leak are the plug style like this:

https://jet.com/product/detail/fdd66...FUgYHwodyjwI7Q

They are extremely easy to replace once you find them. Our 2001 Winnebago Adventurer used this style and it was cheaper and easier to replace them than try to reseal them. They cost less than $10.00 for a set of 3.

Ours were visible when opening the wet bay door. Just hold the nut closest to the tank with a wrench or pliers then loosen the outer nut. Remove the sensor wire (and mark it if you're doing more than 1 at a time) then loosen the second nut. The sensor can then be pushed through the hole into the tank.

Press a new sensor in the hole and tighten the nut closest to the tank until it slightly compresses the rubber. Then reattach the sensor with and secure it with the second nut.

Ours were replaced in about 10 minutes by a tech at the factory service center in Forest City IA. He showed me the process so if they needed to be replaced a second time I wouldn't have to drive 250 miles to get it done. Luckily the replacements lasted until we traded off the coach in 2013.

One note of caution. If you use a macerator pump you empty the tanks remove it and flush the tanks before reinstalling it. The sensors will destroy the pump if they get caught in it.
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Old 10-08-2015, 07:44 AM   #5
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will try to right the ship here and get back on track, [moderator edit]. So how do you access the interior of the black tank to install a replacement or tighten the existing sensor?
Can we sticky this thread?
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Old 10-08-2015, 10:03 AM   #6
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Can we sticky this thread?
We need to limit the number of sticky threads, otherwise they lose their relevancy & clutter up a forum. This thread will not be stuck.

Lori-
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Old 10-08-2015, 10:23 AM   #7
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will try to right the ship here and get back on track, [moderator edit]. so how do you access the interior of the black tank to install a replacement or tighten the existing sensor?
As Hikerdogs suggested, all work is done from the outside of the tank. You just have to access the outside of the tank where the sensors are attached.

The rubber grommet type look like this:

Rv Tank Monitors | RV Parts Country

Check this link for photos and info about upgrading and finding the screw type sensors.

Waste Tank Monitors

If you want to seal up the leaking sensors and replace them, these don't require any piercing of the tank, the sensors do their detecting by induction through the tank wall:

SeeLevel II Tank Monitor
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Old 10-09-2015, 07:27 AM   #8
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We need to limit the number of sticky threads, otherwise they lose their relevancy & clutter up a forum. This thread will not be stuck.

Lori-
Lol, was a joke.
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Old 10-09-2015, 07:31 AM   #9
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Lol, was a joke.
Did you mean sticky or stinky?
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Old 10-09-2015, 08:24 AM   #10
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Thaks BFlinn, for the thorough reply with useful links. From a newbie perspective, that was extremely useful in understanding how these sensors work, are installed, and what options exist.
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