Bilge Pump reconfiguration

Lucky Day · Posted: Sat Mar 13, 2010 2:55 pm Post subject: Bilge Pump reconfiguration

I ran a search on "bilge pump" and got a zillion hits. Hope someone might have answers for this particular situation:

I have an '04 CD-25. The oem Rule Mate 1100 failed three years ago and I replaced it with the same unit. The replacement's automatic function failed sometime after the large snowfall we had in the DC area about 6 weeks ago. The boat rode fine in the water with the snow accumulation. However, once the melting started the bilges filled with water and the boat settled into the water at the stern. I got a call from the marina about a week after the pump failure and, thankfully, got down to the boat while it was still floating. I switched the bilge pump on from the helm switch and the pump dewatered the boat just fine. I got in touch with Rule and they are sending me a new Rule Mate 1100 at no charge.

My questions are:

1 - I would like to put in the "most" reliable setup I can find. Would there be a better choice for an automatic pump than the Rule Mate product?

and

2 - I don't use the holding tank macerator. Would there be any reason not to rig a second bilge pump using the macerator's existing output hose and thru-hull?

All facts, thoughts, and ruminations are welcome.

cemiii · Posted: Sun Mar 14, 2010 7:55 pm Post subject:

I have two bilges. They are both wired manually and automatic one from each battery bank. One is an 1100 and one a 500, both Rulemates and I have never had a problem with either though I almost prefer a separate float switch for ease of checking by just lifting.

This all stems from a trip to Catalina years ago. When I taxied back to where my boat was anchored, the taxi shined his lights were I thought I was and there was a boat nose sticking about 10 inches up. In the clear water you could see the boat perpendicular and sporting (it looked like) about 10# of remaining positive flotation in 100+ feet of water. Fortunately it turned out not to be mine, but that nauseous feeling, and knowing what awaited the other boater, has caused me always to be redundant in this area.

My backup pump is just plumbed high into the motor well. I know that's not perfect but I didn't want to cut another hull hole. Sounds like you already have a second that you can match up (size-wise) with a backup bilge.

Not an issue where I boat, but I suppose snow or ice could definately play havoc with any float switch. I don't know if the computerized models would be better for that situation. They turn on every few minutes and check for back pressure, I believe. Might be better if you have lots of battery juice (as in shore power). Periodic motion might aid in marginal freezing conditions?

Chris

matt_unique · Posted: Sun Mar 14, 2010 8:26 pm Post subject: Pumps

I second the advice of having multiple pumps. Also, when it rains you should prioritize a visit to the boat to make sure all is well.

thataway · Posted: Sun Mar 14, 2010 9:20 pm Post subject:

I have never fully trusted or liked the "all in one" bilge pump. although I have them on some of my boats. I would wire in a float switch, and use the switched circuit for power. It is possible that you can replace the failed switch, but there is too much of a chance it will fail again. I think that the point about ice and freezing may well be valid. This can cause damage to the pump and switch.

The second pump, in your situation, is essential; Mount it just above the level where the pump turns on for the primary pump. You can use the thru hull fitting of the holding tank, but be sure and put a loop up as high as you can above the thru hull. You don't want this to become a back siphon into the boat! Plug the holding tank hose to the macerator pump and double hose clamp it.

rogerar · Posted: Mon Mar 15, 2010 7:10 am Post subject:

This pump switch looks pretty bulletproof.

http://store.hamiltonmarine.com/browse.cfm/pump-float-switch-jr.-12-volt-135587/4,381.html

Roger

Lucky Day · Posted: Mon Mar 15, 2010 11:14 am Post subject:

Thanks for all the responses. I'll be getting to work on the second pump.

Just curious ---

any c-brats from the severe winter areas (AK, ID, MT, WI, MN, MI, etc. etc.) have any comments on dealing with ice in the bilges and how their bilge pumps survive the icing.

BrentB · Posted: Mon Mar 15, 2010 2:03 pm Post subject:

I am converting over to Johnson pumps with sealed electronic switches (Ultima).see http://www.johnson-pump.com/JPMarine/products/bilge/ultimaswitch.html
I will vary the height of the switches but not the pumps
Both pumps will be wired to batteries and one pump will have a dash switch and plan to add a high water alarm.

For cold weather, I would use a full boat cover and pull transom plug and batteries. Sorry does not apply if boat is in the water. If have shore power look at heating cable

designbug · Posted: Mon Mar 15, 2010 2:24 pm Post subject:

I keep my boat in the water here in Annapolis year round. When it gets really cold the small amount of water that is always in the bilge area freezes and my bilge pump won't work.

I've tried pouring a small amount of antifreeze into the bilge with limited success because it eventually gets pumped out. I really haven't found an answer and would like others suggestions. Fortunately since I work in Annapolis and am on the boat almost daily it hasn't been a big problem.

Also, the people at Annapolis City Marina are great...they always keep an eye on my boat! This has been an unusual year. Three times they've helped me remove several feet of snow from on top and in the cockpit of my boat.

Thanks, Dick