Almot wrote:
shum02 wrote:
You guys over think these things. The same P traps and vents protect the gray tanks from smelling up the place as well. Go ahead and let the tanks blend, same difference.
Not being a plumber, I still disagree. Inside the trailer the black tank is only open to the toilet blade valve. No p-traps.
Gray tank is protected with P-traps, and the one under the bathtub (I hope there is one there) is really low, it won't take much to back it up.
I back up my gray tank all the time into the tub. Only way I know the gray tank is full ;)
Get a Flojet macerator and portable tank and quit worrying about filling your tanks. This has worked for myself for 10 years. Easy peasy.