Thru Hull

[Bold Rascal]

Fantastic Plastic

I also had a hardware store variety non marine ball valve on my raw water intake. NPT threads onto straight threads. Marelon was the only 1/2" NPS valve I could find. No issues with mine.

[hanleyclifford]

I am intrigued by this requirement of withstanding a 500 # side load on a thru hull. Is there anyone out there who would consider allowing anyone, surveyor, coastie or other do that to a thru hull on their boat? Consider what even your own weight so applied could do!

[ILikeRust]

The previous installation on my boat? No way - 500 lbs side load would have snapped it right off.

The current one that I installed? It would handle it no problem.

[KeysCatalina]

The previous installation on my boat? No way - 500 lbs side load would have snapped it right off.

The current one that I installed? It would handle it no problem.

500lbs is a lot of force for anything to handle especially laterally... im sure your not going to test this lol.
BTW how much did the install run you?

[ILikeRust]

Aside from the cost of the Groco bronze through-hull mushroom, the Groco bronze ball valve, the Groco bronze flange adapter, the three bronze machine screws, nuts and washers, and the tube of Sikaflex, the install cost me about 45 minutes of my time (with my wife helping).