Black/Grey tanks
Just an idle question ? Why do RV's have separate black and grey tanks. I have a septic system at home; black and grey wastes flow through the same pipes into the same tank; eventually to the field....
Forum Discussion
As was mentioned above, you get more options with separate tanks.
Our 1981 truck camper came with just a single smallish black tank. You can leave the black tank main knife valve closed and the toilet flushes into the tank. But the grey water can by-pass that knife valve to the end cap that has a small capped hose connection in the big cap.
So you can either:
A put a hose on the outside cap to drain the grey water away somewhere, or
B. Leave the outside caps on, and open the tank knife valve so now the grey and black both fill the one tank.
(At the sani-dump be sure to close the knife valve before taking the big cap or little cap off! :) And have the sewer hose ready to catch the initial flow from the small hose connection before you take the big cap off.
I got a second black tank from an old camper (garage sale) to be the grey tank on ours and did some plumbing. ( With the 11 footer it hangs out the back of the long bed truck enough so there is room for the second tank.)
Our 1981 truck camper came with just a single smallish black tank. You can leave the black tank main knife valve closed and the toilet flushes into the tank. But the grey water can by-pass that knife valve to the end cap that has a small capped hose connection in the big cap.
So you can either:
A put a hose on the outside cap to drain the grey water away somewhere, or
B. Leave the outside caps on, and open the tank knife valve so now the grey and black both fill the one tank.
(At the sani-dump be sure to close the knife valve before taking the big cap or little cap off! :) And have the sewer hose ready to catch the initial flow from the small hose connection before you take the big cap off.
I got a second black tank from an old camper (garage sale) to be the grey tank on ours and did some plumbing. ( With the 11 footer it hangs out the back of the long bed truck enough so there is room for the second tank.)
