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Go Back   SailNet Community > On Board > Gear & Maintenance > Bildge Pumps
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Thread: Bildge Pumps Reply to Thread
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Topic Review (Newest First)
12-14-2008 05:38 PM
retclt
Quote:
Originally Posted by L124C View Post
Have you ever tried a Diaphragm pump? Your story is yet another great example of why a dry (or relatively dry) bilge is important. One that I would have never thought of.
It was a Rule with an exceptionally long hard freeze. The pump body cracked. Easy fix. I just dropped the spare in. The pump sits in a little pocket made just for it behind the keel that only holds about a pint of water when the pump is finished. I keep spares of almost everything for the boat. The bigger issue is getting rid of the knot meter. I don't use it anyway. I'm thinking a plugged thru hull.

The diapram worked great for the wife.
12-14-2008 05:03 PM
L124C
Quote:
Originally Posted by cosmoking View Post
In my Coronado 41's keelbolt area I have a lot of narrow channels that trap shallow pools of water. I hate having water around the keelbolts and mast step!
Have you considered building up some of the low spots with Epoxy putty or fiberglass? Obviously, you can't do it with all areas i.e., around Keel bolts, but it might eliminate some of the pools. I did this in my bilge to concentrate the water in one area and it works well.
12-14-2008 04:28 PM
L124C Here is a pump on the Sailnet site that might work well, and It's less expensive than the Jabsco pump. It doesn't list an internal check valve, but I think it would be more effective to put a check valve close to the intake anyway.
FLOJET BILGE PUMP Shop.Sailnet.com - sailing resources, shopping, sail, blogs
12-13-2008 02:36 PM
L124C
Quote:
Originally Posted by retclt View Post
None will dry the bildge. As for the stinky . . . . . . . I will spill a tad bit of head deoderizer in the bilge on occasion. Works great.

And now for something completely different . . . sort of. I learned this the hard way last year. My boat was on the hard during a cold snap and the bilge water froze breaking the pump. Water also froze in the knot meter paddle on the hull. Now it leaks!!! Drat!!!!!!!!!
Have you ever tried a Diaphragm pump? Your story is yet another great example of why a dry (or relatively dry) bilge is important. One that I would have never thought of.
12-13-2008 02:22 PM
L124C
Quote:
Originally Posted by Cruisingdad View Post
Just put a check valve in. Many manufacturers do it. It may require periodic attention as junk can clog it up.

- CD
Put a check valve into what? They are not recommended for primary bilge pumps for exactly the reason you mentioned. The Jabsco pump I referred to (for use as a maintenance pump) has a valve installed already.
12-13-2008 01:45 AM
KindOfBlue Thanks for the suggestions. I will certainly look into all of them.

It may be that we are looking for a yet-to-be-developed product called "The Sneezer". Whenever you have a tad too much water in the bilge, you just push a button and the boat sneezes.
12-13-2008 01:05 AM
retclt
Quote:
Originally Posted by KindOfBlue View Post
Specifically looking for one that can pump the bilge dry and not have a back flow of stinky bildge water flow back in.

None will dry the bildge. As for the stinky . . . . . . . I will spill a tad bit of head deoderizer in the bilge on occasion. Works great.

And now for something completely different . . . sort of. I learned this the hard way last year. My boat was on the hard during a cold snap and the bilge water froze breaking the pump. Water also froze in the knot meter paddle on the hull. Now it leaks!!! Drat!!!!!!!!!
12-12-2008 06:28 PM
Cruisingdad Just put a check valve in. Many manufacturers do it. It may require periodic attention as junk can clog it up.

- CD
12-12-2008 06:03 PM
L124C
In search of the dry bilge.

I recently asked Customer service at Rule (also Jabsco) this same question and here is their answer:

"If you wanted to remove as much water as possible, you could try installing a diaphragm style pump. The diaphragm pumps have internal check valves and are self priming to at least 6'. The only drawback is that the diaphragm pumps do not have as much flow as the centrifugal pumps. If you mounted the centrifugal pump switch higher than the switch for the diaphragm pump, the diaphragm pump could be used for the daily water seepage and the centrifugal pump could be used for emergency pumping.

A new pump that may fit your needs is the Jabsco 50880-1000. It's a diaphragm pump that doesn't need a filter made is made for bilge applications. The key issue is that the 50880-1000 has 3/4" ports instead of the 1 1/8" ports. Check out the link: http://www.jabsco.com/files/50880_sh..._pump_data.pdf "

Looks like the pump for the job! The only drawbacks I see are:
1. switching the pump to be automatic and yet sense water levels low enough to keep the bilge dry. I'm wondering if I could turn one of those switchs that uses water to complete the circuit upside down (to sense water at a lower level) to switch the pump?
2. At over $200 (without switch) it's pricey!
Still, if I could overcome 1. I would bite the bullet on 2. If anyone has any Ideas, please let me know.
I think one of the major advantages to this pump is that the intake is on a hose and can be placed where pumps might not fit. Also, the intake is about an 1/8th of an inch off the bottom of the bilge and will therefore collect more water. All theory at this point, of course!
12-12-2008 05:47 PM
cosmoking In my Coronado 41's keelbolt area I have a lot of narrow channels that trap shallow pools of water. I hate having water around the keelbolts and mast step!

I installed a movable maintenance pump as sailingdog described so I can move it to the 5 different channels and suck up what i can ever week or so.

But the best thing I've found to keep that last quarter inch of water at bay are a half dozen of those cheap wishbone car washing sponges. Just have to wring them out into a bucket once in a while. I wonder if I could combine a cheap bilge pump and a sponge somehow.... hrmmmm

A permanently installed shopvac with a long hose might do the trick, but that would be pretty wonky
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