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post #1 of 7 Old 02-20-2012 Thread Starter
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Bilge Pump (aqualarm)

I have no problem with the pump. I just need it to run longer (period). the float touches the contact pump engages, water is pumped, float drops, water in hose to through hull falls back into the bilge and float raises triggering the bilge.

I am wondering about wiring a relay in line like a fuse breaker set to pop after 15 seconds or something. Or some other contraption. anyone else rig some mechanical system up to let the pump stay on longer and drain more water?

Thanks!
Cullen
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post #2 of 7 Old 02-20-2012
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Many people feel a check valve is a bad idea as it tends to accumulate things and could clog the line.

The theory I've seen most commonly as of late (Catalina 34 message board, Practical Sailor, etc.) recommends installing two pumps. One is a low volume, small diameter hose at the lowest point of the bilge. The other is a higher volume pump intended to kick on when there is more significant water to be removed. The smaller pump will have less volume dropping back when it shuts off due to the smaller diameter hose.

Having said all of that, unless the backflow is kicking the pump back on, it's probably of limited value to rejigger the whole thing. Lastly, have a look at the hose. If you can get it above its drain point closer to the pump, you would reduce the amount of backflow.
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post #3 of 7 Old 02-20-2012 Thread Starter
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I figured it out. I put the switch/alarm in a coffee can with a couple small holes in it, so it drains slower than the pump. so the pump stays on longer and gets more water out.
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post #4 of 7 Old 02-20-2012
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Small holes in a can don't sound like a permanent solution...

Too easy to clog and that leaves either the bilge to fill and the pump doesn't come on...or the can stays full switch on and the pump burns out running dry...

"Might as well take 'er out...If anything is gonna happen...It's gonna happen out there..."
"Captin Ron"
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post #5 of 7 Old 02-20-2012 Thread Starter
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yeah, it is a temp fix but i will think of something to shore it up a bit better.
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post #6 of 7 Old 02-20-2012
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You can buy a little gizmo used for delaying car headlights.,variable 10 sec to 3 minutes ..The water in the hose will still run back but might help.I use it for fan in head at 3 min ..lifesaver.There are pumps that suck not blow that don't drain back much as hose is small (1 inch?)
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post #7 of 7 Old 02-20-2012 Thread Starter
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yeah i was looking for something like that cap'n. could you steer me in that direction. i am proud i came up with the coffee can idea but i would like to wire something more reliable up. I thought about a relay or something like you are saying but I don't know what it is. I was thinking like a timer such as used for motion sensitive patio security lights.

most gratefully,
cullen
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