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