I need to correct my second sentence from my previous post. "Is the dope not a good lubricant and sealer when applied? And if I get frustrated with thread tape, I will just use dope only. We're only talking 16 psia and less than 3 psi delta-p.
The cheap thru-hull is pipe thread on the bottom. Found out when trying to dry fit all the hardware yesterday. So back it goes to Second Wave, today. It's not worth spending much time on speculation, but other than the weird top fitting, it looks "normal." There's probably a commercial application, like penetrating walls (bulkheads) or floors (decks) that uses this oddball.
The valves I received have the triangular base, not as compact to install as the round, and orientation will have some additional challenges. It's going to be a long, hot weekend.
As far as the suggested use of 5200 as thread sealer, I agree that it is a unfortunate shortcut. When owners don't know, or don't know better, they just go away satisfied because there were no go-backs due to leaks below the waterline. On small boats, owner maintained, that might sit unattended for weeks, we should do it right for each other.
Interesting perspective on screened thru-hulls. The same guy that helped me with the bronze fittings got me the B-A thru-hulls, with no screens. He said he wouldn't use screened types because they (screens) cause problems when hit by underwater obstructions. I guess he hit a rock on a thru-hull once and the screen somehow made it worse. Must be a power boat thing, but I didn't ask him about it.
The cheap thru-hull is pipe thread on the bottom. Found out when trying to dry fit all the hardware yesterday. So back it goes to Second Wave, today. It's not worth spending much time on speculation, but other than the weird top fitting, it looks "normal." There's probably a commercial application, like penetrating walls (bulkheads) or floors (decks) that uses this oddball.
The valves I received have the triangular base, not as compact to install as the round, and orientation will have some additional challenges. It's going to be a long, hot weekend.
As far as the suggested use of 5200 as thread sealer, I agree that it is a unfortunate shortcut. When owners don't know, or don't know better, they just go away satisfied because there were no go-backs due to leaks below the waterline. On small boats, owner maintained, that might sit unattended for weeks, we should do it right for each other.
Interesting perspective on screened thru-hulls. The same guy that helped me with the bronze fittings got me the B-A thru-hulls, with no screens. He said he wouldn't use screened types because they (screens) cause problems when hit by underwater obstructions. I guess he hit a rock on a thru-hull once and the screen somehow made it worse. Must be a power boat thing, but I didn't ask him about it.