Anyone ever try this with thru-hull scuppers?

[Bushwacker]

I knew I'd seen that term before, but I replaced my built in head with a Portapottie! The vortex scupper is basically a joker valve, but a very weak one. It's essentially open all the time and depends on back pressure to close it. I changed Fellowships design from using fingers off a latex glove to nitrile gloves, which seem to be a little more durable.