Potential Big Mess
Our holding tank WEMA guages (water and holding) failed. The water sending unit failed three times. The holding tank guage failed due to fatty solids building up inside the perferated tube. There is a float in the tube that needs to move freely. The solids eventually build up inside and prevent the full range of motion. Eventually the sending unit will be stuck in one place and fail to indicate a full holding tank. Then you could overfill the tank, have a messy leak, clog a vent line, or just plain make far more work then you really want to deal with. To solve the problem once and for all, I switch to the same guage Hunter puts on the new boats. The snake river Accu-Guage. Works great and has the sensors on the outside of the tank where clogging is not an issue. Additionally, the sensors are just metal foil strips with no moving parts. I will never again use a sending unit, especially for the holding tank, that mounts inside the tank. The environment is just too nasty for mechanical systems to work reliably with out periodic removal, soaking and cleaning. A job, I just wasn't interested in. Scott