[willy]

Thanks Skools I saw that post and I had a fellow tell me he had those and they got clogged inside all the time from small debris, the ones I saw were on the outside of the hull over the thru hull drain like a flap type. I thought they might have been an aftermarket thing. I have in floor drains on my 85 v20 and the floor is above the waterline but when it bobs up and down with the wave action water comes back in. The boat sits perfectly level in the water, with that Armstrong floatation and smaller motor water does not flow to the back drains all the time. Even with two or three guys in it.