Dumping Grey Water into Black Water Tank

[Frank G]

Another twist to the black and grey tanks. I frequently use grey water to flush the black tank.

Drain the black tank, close the add on safety valve, open the grey tank valve for 15 sec or so allowing grey water to enter the black tank. close the gray tank valve and open the black and safety valve. No grey water ever sees the grey tank and the black tank is cleaner.