EK Ballast Install

[xpjim1]

You also can leave the pump as is. Does not have tobe higher than the bag

[eks]

I do think that raising the pump higher then the sac will stop the unwanted back-flow, but, the pump will have to work harder to prime up as the water will drain away from the pump on both sides when off. Each time these pumps run dry, it shortens the impeller life. I still think it's best/easiest/most efficient, to drain from the bottom of the sac

This is a crude drawing of how a guy on WW did his DIY Ballast Puppy install.

I would have to install at least one more check valve to stop the pump from sucking air from the output vent. Perhaps another check valve after the T so water don't go back to the sack when empting.

[da.bell]

That looks like a much better deal chpthril... don't have to cut any more holes than he already has.

[chpthril]

I agree with mike except for one item. You need a check valve on the vent line between the bag and the T or you will recirculate water bag into the bag when draining

Agree. Good catch, Jim, thanks.

[eks]

You also can leave the pump as is. Does not have tobe higher than the bag

the reason I put it higher is to stop the sack from draining by itself after it is full. The pumps do not stop the watert from going out.

[xpjim1]

But the check valve will stop that now

[eks]

His diagram I would have to use 3 check valves.

[dogbert]

This is a crude drawing of how a guy on WW did his DIY Ballast Puppy install.

I'd lower the pump, but raise the hose between the bag and the pump. This should take some of the pressure off to prevent the trickle. It would make it work a bit harder when emptying, but it shouldn't be too bad.

[eks]

But the check valve will stop that now

true! I am still trying to solve a problem that has being address with a check valve.

[da.bell]

Yes and you definitely will have the ballast puppy working with minimal effort also.

[chpthril]

I'm wondering if the vacuum from the backwards scoop is the cause of the unwanted back-flow??????

[dogbert]

Just curious, what's the purpose of the backflow if you have a vent or are you saying it's in lieu of the vent?

[xpjim1]

You will only need 2 check valves per pump. One between the manifold and the pump and one on the vent line before the T with the drain line. Or if you fill and drain from the top of the bag you could get away with one check valve on the vent line and fill and drain through the thru hull. By filling and draining from top of bag you might lose a little water in the bag but not much. I am taking off my check valves on my fill lines since tehy are higher than the bag

[da.bell]

I'm wondering if the vacuum from the backwards scoop is the cause of the unwanted back-flow??????

Not sure but it's better than a forward one and forcing the water into the bag. Check value will solve this IMO.

[chpthril]

I'm wondering if the vacuum from the backwards scoop is the cause of the unwanted back-flow??????

Just curious, what's the purpose of the backflow if you have a vent or are you saying it's in lieu of the vent?

Asking me? the backflow is the unwanted draining of the sac through the pump while cruising. These pumps aren't supposed to do this.