RVers often discuss how to clean RV tank sensors. RV owners have been asking this question ever since tank sensors were first installed on their vehicles. Several factors can result in a false reading on the holding tank monitor panel, including toilet paper, human waste, grease, etc. A dirty sensor is likely to cause a false reading. Sensors need to be cleaned in order to function properly.
3 best methods to clean RV tank sensors:
Make a solution of water & dish soap that dissolves grease, and let it sit for at least 24 hours before emptying the tanks. If the sensors are covered in grease and gunk, soaking them can often dissolve them, and false readings can often be resolved. Alternatively, you can use automatic dishwasher detergents, which contain softeners. To clean the holding tanks, fill them approximately halfway with a mixture of detergent and water, and then proceed to the destination where you intend to clean them. While driving, the agitation activates the detergent, just like in your dishwasher, and the tanks are cleaned. Your sensors should read correctly once you dump your tanks at camp. Both methods can be made more effective by using hot water.
Several new RV models come with built-in rinsers for rinsing the black holding tanks after they have been emptied. Upon dumping, the owner attaches a pressurized garden hose to a fitting on the side of the RV. This sprays water around the interior of the black tank with the intention of cleaning the sensors. You can add a rinser to your RV if it does not already have one. Water can be sprayed directly at the sensor with the handheld unit. Typically, rinsers are used only on black tanks, but you could add one to a gray tank if necessary.
The first method can be used to soften caked-on gunk, and then the second method can be used to knock it loose.
Be proactive in preventing problems. You can help keep your sensors clean by following these steps rather than waiting for them to get dirty. You should start by using an enzyme waste digestion toilet chemical, which will help break down waste before it accumulates on your sensors. Flush your toilet with copious amounts of water. As a result, the waste will be dispersed in the tank, and the toilet chemical will be able to perform its task. If possible, add extra water to the bowl before flushing. You will spread out the solids better when the water suddenly rushes down into your black tank when you flush. In this way, they will not form a pyramid at the base of the toilet. It is unfortunate that dry campers aren’t permitted to use copious amounts of water or dump their black tanks as frequently as those camping in spaces with full hookups.