I try to fill and flush a couple of times after each trip. I do it at the last place we are at with full hook ups. I've been filling the black tank by letting the water run in the bathroom sink. It works, but it is slow. I fill and drain a couple of times until the effluent is reasonably clear.
I have a Valterra flush fitting that I will install before our first trip next spring.
Regards,
Randy
__________________
|