2007 Jayco jayflight 29 foot travel trailer. Gone out twice so far and after use I drain the tanks but the light on the black water tank shows 2/3 full and after hearing the sewage water go down the hose it seems empty but the light shows 2/3 full I'm afraid to go out this weekend and get set up to find a nearly full tank.. Anyone have that problem?

Alberta Born wrote:2007 Jayco jayflight 29 foot travel trailer. Gone out twice so far and after use I drain the tanks but the light on the black water tank shows 2/3 full and after hearing the sewage water go down the hose it seems empty but the light shows 2/3 full I'm afraid to go out this weekend and get set up to find a nearly full tank.. Anyone have that problem?Almost everyone has that problem, the gauges are VERY unreliable. If you have a flush system it might clear the lights. If you do not have a flush system, get a wand that sticks down the toilet to clean the tank. Many just give up trying to keep them working.

Ditto on the toilet wand. My last 2 trailers had flush systems but I got a lot more "stuff" out after using a wand.

In all the years and rv's we've owned, never had a black tank indicator that worked. I simply ignore it now and just dump about every 5 days or when we are ready to leave. The only indicators that have ever worked for me were the fresh water tank ones.

Toilet paper an other stick to the sensor and give unreliable readings. Like others have said a through flush should clear it.

Mine works........when I keep it "clean". My rinsing process continues (maybe up to 3 fill & dump cycles) until the light indicates empty. It's at that time my visual of the tank is squeaky clean. :)

Black water tank light says 2/3 full after draining

Community Alumni
May 31, 2017
In all the years and rv's we've owned, never had a black tank indicator that worked. I simply ignore it now and just dump about every 5 days or when we are ready to leave. The only indicators that have ever worked for me were the fresh water tank ones.
mbopp
Explorer
May 31, 2017
Ditto on the toilet wand. My last 2 trailers had flush systems but I got a lot more "stuff" out after using a wand.
Lynnmor
Explorer
May 31, 2017
Alberta Born wrote:
2007 Jayco jayflight 29 foot travel trailer. Gone out twice so far and after use I drain the tanks but the light on the black water tank shows 2/3 full and after hearing the sewage water go down the hose it seems empty but the light shows 2/3 full I'm afraid to go out this weekend and get set up to find a nearly full tank.. Anyone have that problem?

Almost everyone has that problem, the gauges are VERY unreliable. If you have a flush system it might clear the lights. If you do not have a flush system, get a wand that sticks down the toilet to clean the tank. Many just give up trying to keep them working.

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Black water tank light says 2/3 full after draining

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