Originally Posted by camprat
Blue eye If you haven't run a hose to your vent up top you may want to & flush the vent stack & open your dump & let it rip for a time. Low-tech IT may work & what is there to lose.
I have a retired Navigator friend who did just this. He put a hose in his vent stack and "let 'er rip" to clear a blockage in his black tank. The black valve was open, but, unknown to him, the restriction he was trying to clear let less water out than was going in.
He went across to chat with his neighbor while the flush was in progress and when he looked at his camper water was running out of the BOTTOM of his camper.
Apparently, the weight of the water in the tank, plus the weight of the water in the stack was too much for the tank to support and the tank burst.
This might sound like an "urban legend" but no kidding, I got it first hand from a very upset friend. It cost him a small fortune at the campground to get it repaired enough to be road-able to get home. He then paid another small fortune to get it permanently repaired.
The moral here is:
If you do try to flush through the stack, Keep a REAL close eye on what is happening in the tank. Maybe open the valve on the toilet and have someone outside at the water shutoff valve to hear you scream.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW