Sewer Flush ??
Just bought first fifth wheel, Just above the purge valves there's an inlet valve for a hose(threaded) that says "sewer flush". Am I correct in assuming that I should hook a hose there when dumping bl...
Forum Discussion
one_strange_texan wrote:
I confirm that this is a flush for the black tank only. I believe there is some sort of spray distribution nozzle within the tank and this will wash the side walls and the tank in general. My technique is to drain the black tank first, then use the flush. I have one of those clear spool pieces at the trailer drain outlet that let's me monitor the (ahem) color & contents of the liquid being drained. I do flush with the black water drain valve open. I let the flush water go until it runs clear for a while. Every now and then, I will close the drain and let the flush build up in the tank for a "surge" cleaning approach, but I never leave it unattended. I also concur with the separate dedicated hose to conduct this flush.
X2 ^^^^ Including the short clear tube. I often add 5 to 10 gallons of water to the black tank for the ride home. Never fails to be some paper and the water is colored when I dump it in the clean-out at home. I think that proves the rinser doesn't wash the tank walls very well.
