Quote:
Originally Posted by BB_TX
The black tank flush is not meant to fill the tank. It has a spray head to help loosen up any remaining solids that might remain in the tank after the initial draining. I let my tank fully drain. Then I start the flush. After it runs 1-2 minutes I close the drain valve while the flush is still running. After another 1-2 minutes I reopen the drain valve to drain that water with the flush still running. Some additional solids will come out. I close the drain valve and repeat the procedure 2-3-4 times each time the amount of solids is less. Not looking for a “clean” tank. Just getting out most of the remnants.
Just pay attention. Walking away and forgetting the flush is running could end up with a nasty mess.
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That is the correct answer and it works well. Just don't leave the water running and unattended.