rstrick said:
I do alot of work on a military base and they for some stupid reason will not let you dump on base..
I'm ASSuming you mean ground dumping and not draining in sanitary sewer drain.
if that's the case....
if the van isn't way down hill from the house's interior, you can cuff your vac hose to the dump valve port and drain back into a toilet or other suitable sized sanitary drain.
We've done that before in com buildings where ground dumping wasn't legal or couldn't be done discreetly.
we've also used a "po-boy" pump out in the past.
which is just a utility sump pump dropped in the waste tank.
It's a PITA, cause you have to shut down, move the tank lid over or off and drop in the pump to pump out.
but it works in a pinch if you can't ground dump legally.
and it still takes much less time than leaving the job to find the nearest car wash
..L.T.A.