I have a Canadian built salmon troller (plank on frame). It is fastened with steel boat nails. There are several unused/corroded thru hulls with gate valves that I plan removing. Also, I'm adding a cabin which will require putting in thru hulls and seacocks for the head. I can't use the old head thru hulls due to the distance from thru hull to head (40 ft).
Now, my question. What is a good method of plugging the old thru hulls? Should I be concerned with bronze thru hulls and dissimilar metals (the steel fasteners)? Are the marelon fitting worth using? I'm a Neo-Luddite and, afraid of plastic. Also, any hints on installing seacocks would be appreciated.
Thanks in advance - Terry