I put my ski under water a lot and like how fast a one way valve works. My flap valve one way was leaking a little bit after two years. Just a little bit. But I knew I would have to tear into the hull to replace it, so for my new build I'm trying to decide what would either last the longest or be easiest to replace. Leaking while I'm floating in the lake is not an option for me so I guess a scupper is out of the equation. The blowsion valve is only $29 but I can't tell if it is any different than a zoeller or home depot valve.