When we installed a Lavac (really like it) we plumbed the sink drain and head raw water intake to the same thru hull. For normal weekending and short trips when water is in abundance we close the thru hull, run fresh water into the sink, through the drain and into the toilet - works great and (I think) keeps the smell down as well as the salt water/urine interaction that we think over time clogs up hoses.
When long range cruising we simply open the thru hull and use salt water to flush.
Seems to work OK so far.
When long range cruising we simply open the thru hull and use salt water to flush.
Seems to work OK so far.
