I understand what your saying but the problem is larger then that.
The last owner needed to replace the sea cock for the galley
drain. So he went to home Depot and bought a regular brass gate valve you would use for a garden hose on your house.
As we all know this will corrode from the inside out. The brass is cheap
and the gate valve is not stainless. He then used the old nipple to attach the hose to which was also wore out.
So now I have a valve through the bottom of my boat that is a time bomb for a huge leak just waiting to happen that I need to repair. I can plug
it at both ends and replace the thru hull
later or I plug
it and replace the valve until haul out
next year. Either way I need a valve for my own sense of ease.
He also used them for the head
which I have to replace but I have them blocked off for now. Does 5200 dry under water