Peggy Hall seems to like all these products, and she certainly seems to know what she is talking about. I wonder hat would be the best choice to replace old ITT Jabsco heads on a live-aboard (with one or two aboard) 37' Cheoy Lee Trawler in snowy New Rochelle, NY? In winter fresh water can be gotten, but it is a chore. In Summer, there is a pump out boat from Hudson Riverkeeper.