As many before me have had holding tank sensor issues, I know that faulty readings are nothing new. I've looked into the See Level and other type of "through the tank" monitor strips, but they require getting access to the side of the tank. My tanks in my camper would require me to drop the belly pan and gain access from there and I'm not willing to do that just to get accurate monitors. I have fairly easy access to the top of my tanks and wanted to know if any vendor offers a through the top monitor setup. I would be less worried about drilling a new hole in the top of the tank, vs the side so the fact that I'd have to drill into the tank isn't an issue to me. Just wondering if anyone has seen a setup with top mounted monitor/float assembly.Thanks for any leads.

Nope....side mount onlyToilet burps..time to dumpShower/sink starts to drain slower....time to dumpWater pump goes ''burrrrrrrrr'...should have added more waterI haven't looked at my level gauge monitor panel in almost 7 yrs.

To the OP, the only sensors that really work are the See Level external type. You don't have to drop the entire under belly, you can cut a large access hole in the plastic and seal it up with Gorilla Tape, or just live with inaccurate sensors live I have for the last 10 years on 2 trailers.

Cutting a 3 sided access panel is the best way to access the tanks. Fwiw, the gauges on my tanks are located near the valves. I currently open an access panel a while back to service my valves and can always reopen it if needed to service valves or gauges by removing gorilla tape. The tape holds well. Btw - I also don't care if my gauges are accurate. I know when the tanks need dumping or filling based on use, sounds, etc.

Add 15 gals of water and 3 lbs of rock salt to the black tank before your next trip. If that doesn't clean up your sensors, they are really messed up.

last year in the high heat I started to get false reading of 3/4 full. Flushed tank out with the Hydro flow fitting on the dump hose. It is a right angle with a hose water hose attachment. Then added the enzyme solution for the black water. Filled it with a third tank of water and drove 5 hours to the next campground and dumped. No more problem. The sensors get coated and give the false reading. Try this before you drill holes or try to remove sensors.

Holding tank monitor sensor question | Good Sam Community

15 Replies

Erie_Tom
Explorer
Jun 05, 2014
last year in the high heat I started to get false reading of 3/4 full.

Flushed tank out with the Hydro flow fitting on the dump hose. It is a right angle with a hose water hose attachment. Then added the enzyme solution for the black water. Filled it with a third tank of water and drove 5 hours to the next campground and dumped. No more problem.
The sensors get coated and give the false reading. Try this before you drill holes or try to remove sensors.
coolbreeze01
Explorer
Jun 04, 2014
Add 15 gals of water and 3 lbs of rock salt to the black tank before your next trip. If that doesn't clean up your sensors, they are really messed up.
therink
Explorer
Jun 04, 2014
Cutting a 3 sided access panel is the best way to access the tanks. Fwiw, the gauges on my tanks are located near the valves. I currently open an access panel a while back to service my valves and can always reopen it if needed to service valves or gauges by removing gorilla tape. The tape holds well.
Btw - I also don't care if my gauges are accurate. I know when the tanks need dumping or filling based on use, sounds, etc.
Ron3rd
Explorer III
Jun 04, 2014
To the OP, the only sensors that really work are the See Level external type. You don't have to drop the entire under belly, you can cut a large access hole in the plastic and seal it up with Gorilla Tape, or just live with inaccurate sensors live I have for the last 10 years on 2 trailers.
Old-Biscuit
Explorer III
Jun 04, 2014
Nope....side mount only

Toilet burps..time to dump
Shower/sink starts to drain slower....time to dump
Water pump goes ''burrrrrrrrr'...should have added more water

I haven't looked at my level gauge monitor panel in almost 7 yrs.

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Holding tank monitor sensor question

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