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Install of Flue Pipe and Cap for Heater
I am getting ready to install a Newport P9000 heater and this requires drilling a 3 inch deck hole for the flue, and then screwing on a cap, on top of the deck, that the flue pipe slides into. My boat is a PSC Flicka and I suspect that it has 1/4 inch fiberglass, then 1" marine plywood and then 1/4 inch fiberglass type construction. So, I will need to seal the wood core with epoxy prior to installing the cap.
I have two questions and hope that someone has already been through this and figured it out:
1) Will epoxy hold up OK in this application next to a warm flue pipe? Granted, the flue pipe diameter is 2 and 1/2 inches and the hole is 3", and the outer flue is for intake of cool air, with a smaller diameter hot exhaust pipe in the middle, but still, it might get a bit warm anyway. I looked up West Systems Epoxy and the 105/205 combination had a Tg (glass transition) at 142 degrees. I doubt it will get that hot, but who knows? Has anyone done this install with epoxy and if so, is it holding up OK?
2) The deck cap comes with a rubber gasket, but I want to use some sealer in addition to keep out water. Silicone would work here, but ultimately is not a great adhesive. So, I was thinking of using some Life Seal which is 1/2 silicone and 1/2 polyurethane to coat this gasket with prior to install. It is going over a nonskid rough surface, so some type of sealer is imperative here. Any ideas of what would work with a rubber gasket?
thanks for any help here. Steve