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  1. #21
    Join Date
    May 2009
    Posts
    27

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    FMan,
    How are you pumping your bags dry? Are you using, what looks like a third pump in your picture for that?

  2. #22
    Join Date
    Mar 2009
    Location
    Roseville, CA
    Posts
    1,295

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    Quote Originally Posted by tjonas1 View Post
    FMan,
    How are you pumping your bags dry? Are you using, what looks like a third pump in your picture for that?
    Bags drain with stock pumps from Supra, one on each bag, I did not modify any of the drainage system from stock. The Tsunami's are only to fill the bags, not drain them. There is a seperate pump for each bag to drain them.

  3. #23
    Join Date
    May 2008
    Posts
    7

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    One simple reason the bags dont drain thru the empty pump is the drain hole on the side of the boat is higher that the level of water in the bag.

  4. #24
    Join Date
    Feb 2009
    Location
    Minneapolis, MN
    Posts
    3,113

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    Thank you!

    That is also the first really good reason I can think (IMHO) to have the drain routed through the vent/overflow hole.
    Last edited by 87SunSportMikeyD; 08-11-2009 at 10:45 AM.
    --WakeMikeys 1987 Supra SunSport--
    Thread - https://forum.supraboats.com/showthread.php?t=3630
    Photo Gallery - http://photos.wakeboarder.com/showga.../35518/cat/500
    Videos - http://www.vimeo.com/user2034462/videos
    Follow me on Twitter @WakeMikey

  5. #25
    Join Date
    Mar 2009
    Location
    Roseville, CA
    Posts
    1,295

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    Quote Originally Posted by moombadaze View Post
    One simple reason the bags dont drain thru the empty pump is the drain hole on the side of the boat is higher that the level of water in the bag.
    ???? As long as the drain pump is lower than the bags/drain line it should drain with no problems. The pump has plenty of power to get the water to the exit hole even though it is higher than the pump itself. You will loose a little efficieny because of the friction loss. My pump is in the lower engine compartment, which is lower than the drain line coming from the bags. One thing that will create problems with these bags draining is having air pockets in them with an aerator pump. This is another reason I am adding a seperate vent line for each bag when filling to eliminate the air build up you get while filling them.

  6. #26
    Join Date
    May 2008
    Posts
    7

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    Quote Originally Posted by moombadaze View Post
    One simple reason the bags dont drain thru the empty pump is the drain hole on the side of the boat is higher that the level of water in the bag.
    Sorry, should have added- when the empty pump is off.

  7. #27
    Join Date
    Feb 2009
    Location
    Minneapolis, MN
    Posts
    3,113

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    fman I was trying to clarify this point because that is a common problem with aerator systems - how to stop the bags from draining out the drain pumps when the pumps are turned off. They do not stop the flow of water by themselves. Most people use a gate valve. But like moombadaze says if "the drain hole on the side of the boat is higher that the level of water in the bag," then if there is no syphon effect (or you use vented loop) you should be good to go.
    --WakeMikeys 1987 Supra SunSport--
    Thread - https://forum.supraboats.com/showthread.php?t=3630
    Photo Gallery - http://photos.wakeboarder.com/showga.../35518/cat/500
    Videos - http://www.vimeo.com/user2034462/videos
    Follow me on Twitter @WakeMikey

  8. #28
    Join Date
    Sep 2008
    Posts
    27

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    mine drains out the empty pump line when surfing. If you fill the bags full, then throttle on the water pressure increases and runs out the drain thru-hull. I put in a ball valve on the empty line to keep water in. Easy to do, but kind of a pita lifting seats to turn the valve to empty.

  9. #29
    Join Date
    Mar 2009
    Location
    Roseville, CA
    Posts
    1,295

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    Quote Originally Posted by jeilers1 View Post
    mine drains out the empty pump line when surfing. If you fill the bags full, then throttle on the water pressure increases and runs out the drain thru-hull. I put in a ball valve on the empty line to keep water in. Easy to do, but kind of a pita lifting seats to turn the valve to empty.

    I installed the vented loops, they seem to be working great. Basic concept, but gets the job done.

  10. #30
    Join Date
    Aug 2009
    Posts
    1

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    Fman,

    Do you think the Tsunamis 1200 pumps would that be much more difficult to install instead of the 800's, to get the extra flow, or is there a reason you didnt go with those?

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