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Product Details

Rule automatic bilge pumps have an internal computer chip to cycle pumps every 2-1/2 minutes. The pump runs for one second and shuts down if no water is detected. If water is detected, automatic pumps sense resistance at the impeller and run until water is removed. No float switches required.

500 (Rule 25SA), 1100 (27SA), 1500 (51S), and 2000 (53S) GPH pumps handle the spray and rainwater that can quickly fill a small or open boat. 12 volt DC. Minimal power use or current draw in sensing mode. All pumps are completely submersible, rust and corrosion free, and ignition protected. Built in strainer base snaps off for easy cleaning.

Reviews for Rule Automatic Bilge Pumps

10 of 12 Reviews

May 11, 2013

Just Awful
By Alec from Narragansett Bay

Purchased this pump last season. I have a small boat 25' every 2 1/2 minuets you hear the pump cycle on. Try setting your sleep cycle to this pump. It does not always turn itself off. When we launched the boat this year it ran my cranking battery down to nothing. I have cleaned it several times but it continues to run after cycling. This pump is located in the aft bilge and not very accessible which adds to my frustration. I paid about $175 for this pump and am changing it to a non automatic wihth a separate float switch (Water Witch electronic).

Bottom Line No, I would not recommend to a friend

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March 26, 2013

Piece of junk
By Andy O from Keyport, NJ

After taking great care to ensure the correct installation of this product and sealing all electrical connections last May, the 2 1/2 minute automatic timer failed after about 2 months. So we used the unit manually. This fall I left the pump in the boat while occasionally charging the batteries so that I could quickly bilge rain water. It died in December. What a pathetic piece of junk.

Bottom Line No, I would not recommend to a friend

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January 2, 2013

Will never buy another one
By Dennis from Florida

I bought this to replace my float switch pump. I am very unhappy with the product. Sounds like someone is constantly tapping on the hull of my boat

Bottom Line No, I would not recommend to a friend

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October 3, 2012

Fail On / Fail Off
By rmtsailor from Newport, RI

Replaced similar pump with a float switch. Solved the problem of the pump running dry when heeled on a tack. Go a few hundred miles... pump fails. New problem is 3 failures of the fully automatic pump. Fails off 2X. Fails on 1X. I installed a parallel larger pump for several reasons, but I still would like this pump to work as primary, low flow, bilge pump. Last failure (Failed ON) was three weeks after install.

Bottom Line No, I would not recommend to a friend

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August 27, 2012

Great Pump!
By Ray from Bow, WA

Boat Bilge...mainly for raineater build-up.

Bottom Line Yes, I would recommend to a friend

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September 19, 2011

Interesting Option
By Dan from Media, PA

I recently installed this pump in the back of a small outboard-powered skiff. I chose it over float-switch operated pumps because I didn't have much room. Also, looking at internet ratings, these automatic pumps seemed to be consistently higher rated than similar pumps with float switches, leading me to surmise that float switches are more problematic. This pump has 3 wires, so it can be wired to come on continuously, or for the characteristic on every 2 1/2 minutes to "test" for water. I only wired the intermittent circuit, although I see myself wiring continuous mode in the future to force it to run, for example during clean-out of the boat after use. The pump works very well. The slight noise when it cycles on is noticeable, but not objectionable. I will only occasionally use it to keep the boat pumped out while unattended. I have not yet used it long enough to judge long-term reliability.

Bottom Line Yes, I would recommend to a friend

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July 7, 2011

All Inclusive
By boatmax from Guntersville, Alabama

This is a GREAT pump. I bought two to replace older and much larger pumps with external float switches. Since this one cycles, and detects water, it is trouble free. I have a leaking outdrive boot, and a stream of water is leaking in. This pump not only keeps up, but cycles off when it catches up. Yes, I do plan to replace the leaking boot next week.

Bottom Line Yes, I would recommend to a friend

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August 23, 2010

Keeps on Running
By Jim from Grosse Ile Mich

I liked this pump until I found it running none stop with no water in the bildge, Paid over $70 for the pump this spring, about 90 days ago. Waiting to see how the marine store is going to back up my purchase with no receipt.


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January 28, 2009

Automated Pump
By Dennis from So. Texas

These pumps are the best idea ever! Forget broken and/or unreliable float switches. The pump cycles regularly (and you get used to the quiet sound), staying on only if it detects resistance - water. The other review here is a small boat, obviously, with no charger. Pump uses only a very small amount of amps, and if you're hooked to shorepower it's a no-brainer. I LOVE these pumps! So will you.

Bottom Line Yes, I would recommend to a friend

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January 27, 2009

Works fine for me.
By Steve from Long Island from Long Island NY

I have used a RULE automatic bilge pump for years. I have owned several of these and have had no problems such as Fred describes. The pump cycles periodicly to sample for water and than shuts down. In doing so, it uses very little current. I find this much more reliable than a float switch, which is prone to hanging up. The only thing I can think of is that Fred had a small leak, causing the pump to constantly be pumping out his bilge, leading to a dead battery.

Bottom Line Yes, I would recommend to a friend

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