December 21, 2018
Needed to replace a below the water ball valve in my new to me boat, that was made of the wrong material and had seized open. Shoved the Sta-Plug in the thru-hull from under the boat. Went inside, removed the hose, saw no water coming in, removed the old ball valve and screwed on a proper marelon valve. Literally only a couple of drops of water came in. Easy and done.