On my 2011 Allegro Bus coach I have the SeeLevel Model 709 Tank Sensor System. The sender units are installed on the outside of the tank and they send level information to the digital level receivers which are located inside the coach as well as in the service bay area.
All of my level gauges (Fresh, Black & Battery) work fine. The Grey level gauge however is not working properly. I have replaced the sender unit on the outside of the Grey Water tank and I still have the same problem.
When you empty the Grey Water the gauge works fine as you can see the level on the digital gauge go down as the tank is emptying. When the gauge raeches 8% full the digital reading jumps to 25%, 29%, 33% then 42%. It remains at the 42% level even though the tank is empty. The digital receiver does not start registering the proper level again until it reaches 33% full and then it registers proper levels until the Grey Water Tank is full again. When you empty it the same problem as outlined above happens again.
The manufacturer, Garnet Technologies suggests to me that there may be a build-up of "Soapy Water" inside the Grey tank at the 8% Level. I have tried a product called "Digest-It" while being stationary in Yuma, but so far that has not worked. I have also tried Calgon Water Softener which I have dissolved and poured into the tanks. I am departing for the Phoenix area on March 1st so I want to fill my Grey Water Tank about 20% full then put something in the tank that will swish for 3 or 4 hours while driving.
Does anyone have any suggestions as what may have worked for you to wash away this supposed soapy build-up in the Grey Water Tank?
Garnet Technologies has also suggested that this soapy build-up could be caused by using liquid soap in the dishwasher. Does anyone have any suggestions as to what you have used for soap your dishwasher(s)?
When you get ready to leave on your trip to Phoenix, I would fill your grey tank 1/3 to 1/2 full with really warm water, add a couple of cups of Calgon and hit the road. Dump your grey tank as soon as you can when you reach Phoenix. We always travel with tanks about 1/3 full wehn we can.
Hi, these cheap little sensors on the tanks are mostly a joke. If they have a coating on them and stay wet they will show a reading. People have used the bags of ice trick, put a few gallons of water, a couple of bags of ice and drive to slosh the ice around, seems to work okay. But they get clogged up again. You can prove this by letting the sensors dry out and you readings will probablay go to low or empty. I finally gave up on them and empty based on estimated use or when you see water backing up in the shower drain, usually the low point of the grey system. A lot of people just leave the grey valve open when parked, I have a masarater so I open and close mine based on need. charlie in texas
1999 Southwind ford V10
Gibson hedders and exhaust
Tacoma, 4x4 toad
I too have the SeeLevel system and it works the same now as the first day. It almost sounds like there's something floating in the tank (like a cutout plug) and settling right in front of the sensor when the tank is drained.
Short of drilling a small hole in the tank and going in with a camera, you may never know. Many service centers have the camera's.
Just offering an optional thought, I wonder about mine too, but so far so good and the coach is 4 years old.
I would doubt that it's the dishwater detergent. Unless you are using a regular dish detergent (Joy for example), instead of Cascade. Cascade is designed to be low sudsing, so I don't see that being the problem. Of course, many people use regular dish soap in the sink, and that goes to the same place.....
Bill & Claudia / DD Jenn / DS Chris / GS MJ Dogs: Sophie, Abby, Brandy, Kahlie, Annie, Maggie, Tugger & Beau RIP: Cookie, Foxy & Gidget @ Rainbow Bridge.
2000 Winnebago "Minnie" 31C, Ford V-10
Purchased April 2008 FMCA# F407293 The Pets
cdking1 wrote: Hi, these cheap little sensors on the tanks are mostly a joke. If they have a coating on them and stay wet they will show a reading. People have used the bags of ice trick, put a few gallons of water, a couple of bags of ice and drive to slosh the ice around, seems to work okay. But they get clogged up again. You can prove this by letting the sensors dry out and you readings will probablay go to low or empty. I finally gave up on them and empty based on estimated use or when you see water backing up in the shower drain, usually the low point of the grey system. A lot of people just leave the grey valve open when parked, I have a masarater so I open and close mine based on need. charlie in texas
He has a SeaLevel system and the sensors are on the outside of the tank.
Robin Brumfield
2011 Dodge 3500 DRW CC
2012 Jayco Eagle SuperLite 31.5RLTS
Okay, Robin, but I wonder how the soap got on his sensors. This is what the Mfg said. Being an electrician and plumber, I already know there is no magic way for this to happen. Just trying to help. charlie in texas
We have the sealevel system. We used Pine-Sol and water in the tanks on the way home. It seems to clean the tank walls without doing anything else. We dump as soon as we stop at home. Easy, cheap, smells good...
1999 32' Adventurer (no slides) with Grand Vitara toad
Pride 3 wheel mobility scooter
Only 3 states to go in the USA, most of Canada and some of Mexico too!
On my old Allegro I had the same problem with my seelevel system. I put 5 gals vinegar and about the same amount of water, added 3 boxes of baking soda and 2 bags of ice cubes. I then went for about a half hour drive, switching lanes, starting & stopping and generally driving like a drunk. Got home dumped the gray water and filled with fresh and the gauge worked perfectly. Now I always use some TSP in both tanks and that keeps any thing from sticking.
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