Originally Posted by KeelHaulin
Interesting... I also noticed the thickness was greater; the old fitting weighed at least 1/3 more than the new one. Could you explain why you would want to bond all of your thru-hulls to a zinc? I thought that any isolated thru-hull (with no direct connection to the electrical; like cockpit/sink drains) should be left without a bonding wire to keep it electrically isolated.
The bonding wire is like a belt and suspenders. On newer boats the thru hull's are bonded. My boat was made in 1985 and the thru hussl look good. I did replace the Marlon plastic valves with brass.