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...
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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 know at least one person who has had a toilet overflow by letting it go unattended. I also concur with the separate dedicated hose to conduct this flush.
