Clarification on venturi drains

As far I can see this is not a one way flow item, contrary to what I think i have read previously. So having it open water drains out when underway, but then flows back in when you stop. Having it closed means seat well doesn't drain when you are swamped, and this can hold a lot of water (approx 18liters/kg) adding weight and instability, and hence inadvisable

So what is the recommended set and forget mode? Surely its not intended to manually open to drain then manually closing when drained? Thats just not practical, and would take a level of obsession to do.

If debris collects under the bung, and as its under seat you cant see or clear it, then its not going to seal and water will seep in regardless,eventually filling to loaded waterline even in flat conditions with no water coming overboard

I just leave it cleated open and can see no practical need for the bung and cord. The venturi housing underneath simply helps it drain faster while travelling. Any reason not to just remove the bung and cord as thats just extra clutter, and potential to have it closed without realizing it.

If this had a reliable one way arrangement it would make sense, but that would then be prone to blockages.

Talking about a revo 16 where seat well is below water line.

Since it is not a float ball system... It has to be opened to drain and closed to hold water out.

_________________
Matt Miller
Former - Director of Parts and Accessory Sales
Warranty and Technical Support
Hobie Cat USA
(Retired 11/7/2022)

Might just remove plug and cord then accept it will always have at least a little water in there. The debris under the bung issue (especially as I always leave seat in) means I cant rely on it sealing even if I want it too.

One less thing to worry about. Just got to make sure that stray ball sinker doesn't get lost under there and plug it

Funny when you forget its closed when you roof top right way up and its rained all night and you effectively have a bucket of water on the roof

Its too shallow for underseat storage on lowest seat settings anyway

The scupper drain gives you some choices: if it's calm, you can keep it closed and keep the cockpit dry; if it's rough out, you can lock it open so unnecessary water doesn't build up in the cockpit (if it's rough, you're going to get wet one way or the other in the Revo 16). If it's a one time swell that washes into the cockpit, you can do a 360, drain the water off and close it again.

Best of all, it's much easier to use than the older plugs! Although it doesn't solve all problems, it's a great improvement over the older system.