I'm replacing all the gate valves in my 28.5 with ball valves and several of the barbed hose fittings are what I assume to be polypropylene. I'd like to know if I should stay with the poly fittings or switch to bronze? What have you done? Thanks.
Engine intake if Thru Hull is Marelon, then use the same. Always good to keep the same type of material to avoid large coefficient of thermal expansion differences.Depends on the lines they service.
Potable water - only plastic
Engine water, both AF and sea water - bronze
Thru hulls - bronze.
Anybody got anything else ?