On this weekend's float hunt we were using a Pro Pioneer. We had an issue where the floor would lose and we tracked it to the valve above the fill valve on the floor- I believe it is a pressure relief so you don't bust stitching in the floor. Believe it probably has grit or sand in it.
Anyhow- anyone know of a way to clear it? Guessing if it doesn't work it'll take a trip to SOAR for a new one.