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BEck14

S238 P&P bags draining while surfing

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BEck14    0

Yesterday was my second day to have my 2017 S238 out on the water trying to dial in the surf wave (without much luck) and while I was behind the boat I noticed water coming out of the overflow port whenever we hit and decent sized wave as well as sitting still sometimes. After opening both lockers and noticing the bags were obviously not at 100%, I checked the ballast screen and the screen still read that the bags were 100% full. Is this a normal thing? I had to continue to press the fill button on both bags since after it read 100% full the pumps shut off after a few seconds. 

I would imagine that the overflow port would have some sort of valve that would only open when the pressure from the pumps forced it open until the pumps automatically shut off, but maybe that wishfull thinking. 

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Aquaholic1    3
40 minutes ago, BEck14 said:

Yesterday was my second day to have my 2017 S238 out on the water trying to dial in the surf wave (without much luck) and while I was behind the boat I noticed water coming out of the overflow port whenever we hit and decent sized wave as well as sitting still sometimes. After opening both lockers and noticing the bags were obviously not at 100%, I checked the ballast screen and the screen still read that the bags were 100% full. Is this a normal thing? I had to continue to press the fill button on both bags since after it read 100% full the pumps shut off after a few seconds. 

I would imagine that the overflow port would have some sort of valve that would only open when the pressure from the pumps forced it open until the pumps automatically shut off, but maybe that wishfull thinking. 

Message me Rc51dr@gmail.com and I’ll give you my number. To much to explain through text.... 

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I believe the pumps are just on a timer so they are actually "dumb."  To my knowledge there are no sensors telling the system whether there is water in the bags or not or what level that water is at.  When I built the surf system on my Yamaha I used spring loaded check valves on the vent hoses, but that was mostly to prevent taking water into the bags from the sides (that boat didn't handle weight well and we often were out in choppy stuff). 

Most spring loaded check valves should have a "crack pressure" specification and I imagine there are some out there that you can get with a higher resistance to the crack pressure which might just do the trick,  It would be a fine line to walk because you want a high enough crack pressure so that it won't allow ballast to dump when listed, but you want air to be able to escape without too much pressure inside the bag.  You could maybe rig up an air vent valve on top of the bag for that purpose in addition to the vent/overflow hose.

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