yanking out the toilet -

[oldbluesplayer]

yeah, I know, -head-.... well...

My '73 20' Seafari has an old, overboard discharge, head, which I want to remove, and replace with a portapotti, easier to deal with. Need to get this done soon, this spring, before I can go fishing for landlocked salmon in the New Hampshire lakes. The head is plumbed with two thru-hulls, intake and discharge - this is the real question -

How to block off the thru-hulls, when I pull the head ? There were no sea cocks on either line, which doesn't thrill me.

Are there solid (no hole) thru hull replacements available, which could just be installed into the holes ? If not, just a short piece of hose and a plug, attached to the thru hull, and double clamped at each end ? Are there thru hulls made with internal pipe thread, where a NPT plug could be screwed into the thru-hull?

Or is there no other way around, than to glass over the holes ? I'd rather avoid this approach, until the weather gets significantly warmer, and more conducive to doing fiberglass work outside.

Whatever route I take, I want to be significantly safe: Lake Winni is damn cold in the spring, and come summer the boat will be out in the Cape Anne/ North Shore area chasing blues, stripers, and hopefully, tuna.

thanks

Bill