Reversible pump with splitter—BAD IDEA?

[dakota4ce]

All you ballast hounds: space is tight in my bilge, but I would love a little more speed for the fill and drain.

Would it work to plumb an extra reversible pump in and split it’s line with a Y and send it to each rear bag?

Would that cause any issues, or would it work to boost fill and drain for both bags?

Have not seen it done in all my forum perusing. Curious.

Peace and love! Dakota


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[chpthril]

We've done impeller pumps with a manual diverter valve to select which sac to fill, so similar scenario. With a traditional Y fitting, whatever the pumps flow rate is, would divided by 2, then added to the flow rate of the pumps currently filling the sacs.

Tell me more about why "space is tight in my bilge" matters. If you can get one pump supplied with water, you can get two pumps, one for each rear sac and no splitter.

[dakota4ce]

Reversible pump with splitter—BAD IDEA?

Ah, I was thinking one reversible would need a dedicated thru hull. Hadn’t thought about sharing.

That would make 5 reversibles in my boat if I got 2–is that a current draw concern with the engine off?

One bummer is that the rest of my setup is all controlled by my helm computer. These I was thinking would have to be manual/non-timed.


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[freeheel4life]

Hey Dakota
I know that starting this year SC changed it so Autowake won't turn on the pumps unless engine is running. Can't even bypass at the switch, but they will drain without engine running at switch. I'm assuming this is because of the higher amp draw.
I guess my concern would be are flow rates being limited by the 1 1/8" ballast hose after the Y??I haven't torn apart a new Supra to really see how they are working it out. One thing I do know is I just got an email about timers, and venting. Sounds like bags are getting overpressured once full if you keep running pumps. They can't vent as fast as water is being pumped in. They specifically unstructed to shut off pumps as soon as venting starts.
I believe as far as wiring them you could still tie them into Autowake. Would have to do some digging and see how they wired the dual pumps to the PDM in the new boats. Once you have that figured though, and wired up, you would just need to do a software update and everything should work like a factory 18. At least that's the route I would try to go.
Also, you could probably do your thru holes at the transom and it would be super easy hose runs to the pumps in the rears (assuming that's where you were going to mount them).

[chpthril]

We share a single intake for two pumps all the time, no issue.

You could get a single Jabsco King. Faster then a single Puppy or Ultra Ballast, but not as much flow as two of the smaller pumps.

Draw is not a concern if you have dual banks. Only looking at about 5-7 minutes of peak run time maybe?

Could likely use relays triggered by the helm controlled pumps to drive the new pumps. But I like simple and would be happy with flipping a switch.

[dakota4ce]

Hey Dakota
I know that starting this year SC changed it so Autowake won't turn on the pumps unless engine is running. Can't even bypass at the switch, but they will drain without engine running at switch. I'm assuming this is because of the higher amp draw.
I guess my concern would be are flow rates being limited by the 1 1/8" ballast hose after the Y??I haven't torn apart a new Supra to really see how they are working it out. One thing I do know is I just got an email about timers, and venting. Sounds like bags are getting overpressured once full if you keep running pumps. They can't vent as fast as water is being pumped in. They specifically unstructed to shut off pumps as soon as venting starts.
I believe as far as wiring them you could still tie them into Autowake. Would have to do some digging and see how they wired the dual pumps to the PDM in the new boats. Once you have that figured though, and wired up, you would just need to do a software update and everything should work like a factory 18. At least that's the route I would try to go.
Also, you could probably do your thru holes at the transom and it would be super easy hose runs to the pumps in the rears (assuming that's where you were going to mount them).

I have a 2016 boat. No auto awake. Not sure how that affects the integration with the software, but as a note.


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[dakota4ce]

We share a single intake for two pumps all the time, no issue.

You could get a single Jabsco King. Faster then a single Puppy or Ultra Ballast, but not as much flow as two of the smaller pumps.

Draw is not a concern if you have dual banks. Only looking at about 5-7 minutes of peak run time maybe?

Could likely use relays triggered by the helm controlled pumps to drive the new pumps. But I like simple and would be happy with flipping a switch.

Yeah I actually wouldn’t mind flipping a switch either. The relay idea is a good one too. And aren’t there timer modules that you can buy so even if I did use a manual set up I could have it set on a timer?


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[dakota4ce]

Now that I think about it if I wanted it to be fully integrated, I would have to use two pumps because it would no longer be a helper pump, it would be an additional left or right palm. In other words the timer for the left pump we control the additional left Tom PMC, the timer for the right palm would control the additional right Tom PMC, so when I fill in a differential manner it would work correctly.
The only bummer is I’m quickly getting up aroind 1000 bucks if I’m throwing all this crap together. LOL


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[freeheel4life]

I have a 2016 boat. No auto awake. Not sure how that affects the integration with the software, but as a note.


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My bad, forgot you were a year before. We don't add much to our Supras, but been doing lots of mods to the Moombas this winter. They have a couple of prewired ACCY switches. Do you have a couple at the helm already?? If so it makes for super easy installs. They already have power waiting so it's as simple as sliding a female spade terminal onto the back of the switch.

[dakota4ce]

My bad, forgot you were a year before. We don't add much to our Supras, but been doing lots of mods to the Moombas this winter. They have a couple of prewired ACCY switches. Do you have a couple at the helm already?? If so it makes for super easy installs. They already have power waiting so it's as simple as sliding a female spade terminal onto the back of the switch.

So you’re saying just stay simple and do a manual helper pump......I kind of like that idea honestly.


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