My Sacs are Bulging

[zad0030]

What if you just put something over the bag, so that when it does slosh it doesnt push on the seat. Think of it as a double wall. A rigid piece of fiberglass or something similiar that lays on top of the bag that while it prevents the seat from pushing up also protects the bag while deflated from puncture.

[da.bell]

Okay, have to ask now but why are you not going the hard ballast tank route?
1) That would help with reducing the pressure that the fiberglass receives when the sac's are filled.
2) Will reduce the amount of storage space that is usable when the tanks are emptied
3) will hold a slightly reduced amount of water but the plastic will also add some of that back. Not much but some.

Seems to me that you have committed yourself to losing the storage already.

[ragboy]

The pressure has to go somewhere. Probably good that it pushes up the seat, so you know it isn't pushing out the fiberglass on the side.

[ragboy]

Okay, have to ask now but why are you not going the hard ballast tank route?
1) That would help with reducing the pressure that the fiberglass receives when the sac's are filled.
2) Will reduce the amount of storage space that is usable when the tanks are emptied
3) will hold a slightly reduced amount of water but the plastic will also add some of that back. Not much but some.

Seems to me that you have committed yourself to losing the storage already.

I do use the storage on the other side. I lose both if I do hard tanks. Also, don't get me wrong, I am not whining. I am having fun. I love working through this stuff, and especially testing. Not to mention, my reward at the end is to have a kit we can easily install into other boats, and sell at wake9.com. But one that has been THOROUGHLY tested.

[zad0030]

What about a hard tank with a rubber bladder inside and a floating lid. That way the hard shell takes the brunt of the surge and the lid on top lowers with the bladder inside, giving you storage when not in use.

[ragboy]

hard tanks could be a possibility, but I have not given up on sacs yet.

[chpthril]

Hard tanks would result in a lot of wasted space that a sac is able to fill. 2nd, I doubt you could get a tank in there, it would have to be 2 separate tanks p/side.

[Ptown]

I got it. Make the storage locker water tight and just fill it with water. No sacks, no tanks.

[Micah]

I am using one of these custom sacs and I'm not experiencing any of these problems. I'm not sure if it's because the sac fits my space better or the ventilation keeps the pressure from building up. The sac is slightly larger than the space but it seems the water would rather exit the vent than push up a seat or bulge the engine sidewall. You might try playing with how your overflow/vent line and the way that it is routed. Did you test your new check valves?

[ragboy]

Yes, ours are filled to the brim, and pressurized from the check valve. Because I need all the weight. You can easily avoid the issues by not filling up so much, and allow it to FREELY vent, so that it will not put pressure on boat. I did some work this weekend, I will post about it later when I have more time.

[ragboy]

I have more info, but I thought I would put this up. I did some more research, and I found this check valve. Its a bit big, but its a plunger style, to use on the vent hose, and you can actually adjust the tension, so you can adjust how much you want your bags to be pressurized/filled.



More pics here:

http://picasaweb.google.com/wakenine...ingCheckValve#

[ragboy]

Sorry, forgot to add a big piece of the puzzle. The other smaller check valves that I have tested have a screw that could be used for adjustment. However, the lowest or default setting is pretty stiff. This larger check valve with one inch tubing takes very litttle pressure to open. Which allows you to start with very little pressure and work your way from there which seems to be ideal.

[laketime]

I got it. Make the storage locker water tight and just fill it with water. No sacks, no tanks.

haha i like it. probably wouldn't be so simple but that would be so much weight!

[Timmy!]

those check valves are the same ones I was looking at for my system.

[Jason B]

Why all this bother? Good lord man! Your answer is sooo freaking obvious I'm disappointed in you for not having seen it already! "Tige Experts" ppsshhht. You just need........