Good Black flush "trick" or bad idea?

bigred1cav wrote:
Please explain, for we novice, how to use the valve to flush black tank?

rv2go wrote:

TNGW1500SE wrote:
When dumping my tanks, I've got a new "trick".

I don't like your "trick" I find it a lot safer using this.

Also when dry camping, I can divert gray water into the Black tank. Thus extending my stay several days as the Black tank seldom fills.

That valve goes right to the sewer hose. So to drain black you would need to open your black and then open that valve in the picture.

If you wanted to mix your tanks you would close that valve and open your grey and black.

To flush black you would drain your black completely, hopefully have a full grey, then close that valve, open both black/grey and (assuming black and grey were same capacity) half of your grey goes into the black tank. Now you have some nice soapy water in your black tank.

This has plus and minus.. plus is soapy water would clean better.. minus is that the soap residue can get on the sensors.

I tried this method and found my sensors are now off. I saw no benefit doing it. But give it a try if you have some issue with odors and black tank that cannot get clean and needs to be.