Black water tank light says 2/3 full after draining

rbpru wrote:
There are numerous compounds you can add to the tank to improve the situation but I have found these to be short lived.

This is my current tank regime, I experience no tanks issues whatsoever, and surprisingly the tank monitors do seem work. :B

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?

If you have access to the underbelly, go get yourself a set of these really easy to swap out and ive yet to have a false reading. i bought a set for the gray tanks as well.

texasChaps wrote:
oh and what's with the bbs censoring the word "re tarded" ?
seriously ?

Seriously. The forums are family oriented, and many folks with a special needs family member find that word to be very demeaning to their loved one. The idea is to keep the board friendly for everyone.

Did this word add so much to your post that you felt it necessary to defeat the filter?

If you have the money they do make accurate sensing devices. Most folks do not worry about it, so the industry has no reason to change.

We get what we pay for. :)

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?

welcome to the world of cheap re tarded RV fixtures..
I'm quite sure 99% of owners have this problem.

It's almost always caused by waste sticking to the sensor and fooling the system.. a good wash with a wand should fix it..

I personally don't bother, I just peek down the potty and eyeball the level...

oh and what's with the bbs censoring the word "re tarded" ?
seriously ?

I always keep in mind that we are talking about a sewage holding tank. It will never be squeaky clean.

The few times I have had an odor, it came from the roof vent pipe and an unfavourable wind.

I tried the ice because it's was cheap, it worked until the next trip.

We do a lot of sight to sight camping and find it best to let the tank slosh and dump when it is nearer to full. We do use the typical tank treatment elixir.

We also have no issue with using the CG wash house to save water and tank space.

5thwheeleroldman wrote:
Similar to lanerd, I put a half box ridex and a gallon of vinegar into the black, bathroom and kitchen tanks; divided according to capacity, before the last dump. The ridex knocks things loose, and the vinegar dissolves calcium deposits (most rv destinations have very hard water). My last overnight is about 100 miles from home, so I drain and clean as well as possible. If the rv has been sitting for a few months, I do the same before leaving on a long trip and drain when tanks are full. Works for me!

Rid-X is meant to encourage bacterial action, which is of no use in an RV black tank. It is not a detergent.

So what's new?

Any one who has been RV'ing for twenty years and has gone through a couple of trailers knows that after the first few uses those gages are useless.
like the rest of the Rv industry, the manufacturers are too cheap to put anything that is quality but will cost a few bucks more.

my background is electrical and instrumentation and we used to specify and install electronic measuring devices in every type of slurry and solid that exists that worked perfectly, but that is asking too much in the RV industry.

jack L

Similar to lanerd, I put a half box ridex and a gallon of vinegar into the black, bathroom and kitchen tanks; divided according to capacity, before the last dump. The ridex knocks things loose, and the vinegar dissolves calcium deposits (most rv destinations have very hard water). My last overnight is about 100 miles from home, so I drain and clean as well as possible. If the rv has been sitting for a few months, I do the same before leaving on a long trip and drain when tanks are full. Works for me!

I have never seen mine work like they should. We can go almost a week before dumping the black tank. We sometimes wash the dishes in a pan...then dump the soapy water in the black tank. If you pull the handle and nothing comes out...then it must be empty.