Originally Posted by arutlosjr11
Sad that they continue to install them backwards.
Indeed, especially when the part has 'check valves for dummies' instructions molded into it. Should be able to get them sensors cleaned off now.
Common trick for getting the black tank really clean but not recommended if there's a lineup behind you at a dump station:
Many RVers typically drain the black tank, turn on the tank flush and wait till it's all clear - or so we think. You'd be surprised how much goop can remain on the floor of the tank.
With that black tank empty and the tank flush on, close the black tank gate valve for about 30-40 seconds. Open the valve and watch all that residual crap come flowing out. Repeat the process as necessary until things are really running clear. Closely monitor this procedure and be mindful not to leave the flush on with gate valve closed for too long. In fact, most RVs have a warning adjacent to the flush connection to ensure that the gate valve is open. The consequences of filling the black tank, that may have a defective vent, with the flush can be beyond nasty.