Mascerators

Good info...but on item 2, once the grey and black tank have equalized (with the macerator off and both tanks open), I will close the gray tank and turn the macerator back on and empty the black. Then i will turn the macerator back off and repeat the procedure a couple more times until both tanks are empty. Since the grey tank is larger than the black, you will have plenty of soapy grey water to help rinsing out the black.

Hope this helps

Ron