Reversible Pump v. Aerator Pumps (1 Fill & 1 Drain)

[T*]

Thanks All for posting the great threads of manifolds and wiring for Aerator type dual pump systems (separate Fill & Drain). If I go the dual pump route, I think I've got enough info to muddle my way through.

How about any diagrams of reversible pump systems? I couldn't find many threads and no system diagrams - are there any on here that I may have missed? I'm considering reversible, as I've heard that they don't generally have a prime issue. I'm filling via a thru-transom fitting - so I won't have any positive flow to prime my system. I also like the idea of minimizing parts/switches/relays, and that solenoid/electric valves shouldn't be needed.

Any thoughts on the pros/cons of a reversible pump system?

Regards, T*

[wminnich]

I'm going for dual pumps on my extra ballast bags (I have factory ballast). I'm adding two fly high sacs under the benchs in the back...plus two small sacs up in the front storage lockers.

I bought Tsunomi 750 gph pumps, they have 3/4 adapters, which screw right into the sacs! The pumps were about $25 each on wakeside.com. So, they are a lot cheaper than dual direction pumps.

I'm not currently integrating them into factory water lines, they have their own hoses, with shut off valves that I toss over board to fill/drain.

The manual shut off valves prevent any leaking and the hoses are not using quick releases. I'm planning on "living" with this set up thru the upcoming summer. If its not a hassle, I'll keep the semi-perm setup. If it bugs me, I go to the expense of integrating it into my factory lines.

I got the idea of the semi-perm setup from the ballast threads on this board.
I have two pumps hooked up to a single hose on each bag.

However, if I integrate it into my factory ballast, I'll probably go to the expense have having a similar set up that Tige used.

I've found I am regularly using around 1700 lbs of ballast on my 22ve. This new arragement will keep the extra sacs out of the floor and under the benches. I don't like to store anything under the benches anyway, its usually a pain getting stuff in/out of there. I'll appreciate the clutter free floor/deck space.

[chpthril]

Thanks All for posting the great threads of manifolds and wiring for Aerator type dual pump systems (separate Fill & Drain). If I go the dual pump route, I think I've got enough info to muddle my way through.

How about any diagrams of reversible pump systems? I couldn't find many threads and no system diagrams - are there any on here that I may have missed? I'm considering reversible, as I've heard that they don't generally have a prime issue. I'm filling via a thru-transom fitting - so I won't have any positive flow to prime my system. I also like the idea of minimizing parts/switches/relays, and that solenoid/electric valves shouldn't be needed.

Any thoughts on the pros/cons of a reversible pump system?

Regards, T*

The main reason I did not go the rev-pump route was cost. For a 3 sac system, it would add about $350 to my install to use the ignition protected pumps. The non-I/P pumps are cheaper, but cant put in engine compartment, it go boom. Wiring is a bit more complex, you need DTDP switches and 2 relays per pump (they draw more amps then what the typical switch will handle)

As far as minimizing parts, you will not need check valves, and a few feet per sac less (no drain hose), but thats about it.

These pumps will self prime, so the thru-transom should not be a problem, just cant fill "on the fly".

TallTigeguy installed a thru-hull mushroom and has no vapor lock issues, and no forced filling which means no need for gate-valve. I am going this route also.

[chpthril]

Forgot to add, check WW, there are lots of pics of the rev-pump setups, and a great wire-diagram floating around.