Gray water
Gray water from shower and bath lavatory. Can this tank leak if the tank is overfilled?
Forum Discussion
Per RVIA code, the Black and Gray system MUST be watertight on all the fittings attached to the top of the tank and the exit fittings. The correct way to do a PDI (Pre-Delivery-Inspection) is to fill up both the Black and Gray till water comes up in the shower and the toilet. Then wait 30 minutes. IF NO WATER comes out on the ground, then the system passes inspection. Even RUBBER collars which the ABS pipes are not glued, will hold the water from the shower and the toilet down tube for that 30 minutes. If the down pipes are NOT watertight, then Sewer odors will migrate out the top of the tanks. Doug
