Good Black flush "trick" or bad idea?
When dumping my tanks, I've got a new "trick". I drain the black water first and let the hose and tank empty out. Then I leave the black valve open, hold the sewer hose up (above the level of the tank...
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That is actually a common 'trick' that has been used for a long time, using grey tank water to flush out black tank.
I personally don't use that approach, as would always be concerned that I'd mess up and let 'stuff' from the black tank get over into grey tank. That, and I find its more effective to just use the dual flush pro device we have to back-fill the black tank with as much fresh water as appropriate, and dump it out. Using this approach, I can fill up and flush out the black tank as many times as necessary until I see the water flowing clear and know that the black tank is clean. Then, I still have entire grey tank to dump, to clean out the hose.
Even better would be a tank rinser or 'quickie-flush' system as I believe it is called. I installed one in our last RV and really liked it. RV we have now unfortunately does not, and no good way to install one, so the dual flush pro unit has to do. Our next RV will definitely have a tank rinser, though.
I personally don't use that approach, as would always be concerned that I'd mess up and let 'stuff' from the black tank get over into grey tank. That, and I find its more effective to just use the dual flush pro device we have to back-fill the black tank with as much fresh water as appropriate, and dump it out. Using this approach, I can fill up and flush out the black tank as many times as necessary until I see the water flowing clear and know that the black tank is clean. Then, I still have entire grey tank to dump, to clean out the hose.
Even better would be a tank rinser or 'quickie-flush' system as I believe it is called. I installed one in our last RV and really liked it. RV we have now unfortunately does not, and no good way to install one, so the dual flush pro unit has to do. Our next RV will definitely have a tank rinser, though.
