I have an old Groco SV thru-hull & seacock that needs replacing. There is no room above the seacock to unscrew it upwards and off, so the thru-hull HAS to be unscrewed down and out. I torched it to break it free and it did rotate maybe one degree before the dogs inside broke off. I've got PB blaster soaking in it for now.
But I am stumped on how to get this apart. Grinding off the mushroom isn't an option because I'd then need to raise it up from the inside and like I said earlier, I don't have any headroom to do that.
One idea I'm considering is grinding opposing flat spots on the mushroom for a pipe wrench to grab. But the mushroom doesn't stick out very far so this won't be easy.
And there is no room under the floorboards to get a sawz-all or grinder on any part of the seacock. Terrible installation.
Any good ideas on how to unscrew the thru-hull now that the dogs are broken off?
But I am stumped on how to get this apart. Grinding off the mushroom isn't an option because I'd then need to raise it up from the inside and like I said earlier, I don't have any headroom to do that.
One idea I'm considering is grinding opposing flat spots on the mushroom for a pipe wrench to grab. But the mushroom doesn't stick out very far so this won't be easy.
And there is no room under the floorboards to get a sawz-all or grinder on any part of the seacock. Terrible installation.
Any good ideas on how to unscrew the thru-hull now that the dogs are broken off?