Rule 25S Marine Rule 500 Automatic Marine Bilge Pump (500-GPH, 12-Volt)

by Rule

Product Features

• Automatic 12-volt marine bilge pump
• 1.9-amp draw; 2.5-amp fuse
• Pumps automatically when the water level pushes the float up
• 3/4-inch discharge outlet
• Three-year warranty

Product Description

Amazon.com

Built for efficient and reliable operation, the Rule 25S Marine Rule 500 Bilge Pump starts working automatically as soon as the water level pushes the float up. Ideal for smaller craft, the compact 12-volt pump has an amp draw of 1.9 and a 2.5-amp fuse. The pump measures just 4 by 2 3/8 inches and is equipped with a 3/4-inch discharge unit to effectively remove water.

Specifications:

• Voltage: 12 Volt DC
• Amp Draw: 1.9 amp
• Fuse Size: 2.5 amp
• Discharge Unit: 3/4 inch
• Dimensions: 4 by 2 3/8 inches
• Weight: 11 ounces

Product Description

Rule 500 GPH Bilge Automatic Pump. No guessing involved here! This Automatic Pump starts working when the water level pushes the float up. 3/4" discharge unit. 12V. Amp draw: 1.9 amp; Fuse size: 2.5 amp; 4 x 2 3/8"; Order Now! Rule Bilge Pump 500 GPH 12V Auto

Product Details

• Product Dimensions: 4 x 3 x 2 inches ; 2.3 pounds
• Shipping Weight: 1 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000O8B7R8
• Item model number: 25S
• Average Customer Review: 4.2 out of 5 stars  See all reviews (16 customer reviews)
• Amazon Best Sellers Rank: #4,276 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • #1 in Sports & Outdoors > Boating & Water Sports > Boating > Boat Plumbing > Bilge Pumps

Customer Reviews

Most Helpful Customer Reviews

14 of 15 people found the following review helpful:

2.0 out of 5 stars Beware of Constant Operation = Battery Drain!!, June 28, 2010

By 

M. Foley "Mofo Knows" (CT, USA) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Rule 25S Marine Rule 500 Automatic Marine Bilge Pump (500-GPH, 12-Volt) (Sports)

This is a compact pump - very small and I am sure like all Rule pumps it's fine quality. However, i purchased the pump for automatic operation (drain my 14ft Dory during the summer so that I don't have to bail the thing after a rain storm).

Here's the rub.... The item description on Amazon for this item is incorrect. It says it has a float switch. It DOES NOT. The way it senses water is: it turns on every 2.5 minutes, and based on the resistance it "feels" on the impeller, it knows if it's pumping water or not. If it's pumping air (i.e. no water is present), it shuts down. The bad thing is - this means that every 150 seconds, it's turning on for a few secongs. The proble witht hat is, you are steadily draining your boat batteries, having this thing hooked up.

Rule does make a automatic 500 GPH pump with a float switch - THIS IS NOT IT. if you care about battery drain, I would stay clear of this.

I have informed Amazon of the error in their description and I am returning mine.

9 of 9 people found the following review helpful:

5.0 out of 5 stars NOT AS DESCRIBED BY AMAZON, July 25, 2010

By 

Low country plant fan (Beaufort, South Carolina) - See all my reviews

Amazon Verified Purchase

This review is from: Rule 25S Marine Rule 500 Automatic Marine Bilge Pump (500-GPH, 12-Volt) (Sports)

Amazon should correct the inaccurate description of this item which states "......STARTS WORKING WHEN THE WATER LEVEL PUSHES THE FLOAT UP." As several other posters have noted, this pump DOES NOT have, or utilize, a FLOAT switch. Instead, it starts up every few minutes and it automatically measures resistance on the impeller shaft for a few seconds to determine whether it should continue to run. If there is water in the bilge, the shaft resistance causes the pump to continue to run until the bilge water is removed and no resistance is noted. The electrical drain during the resistance testing phase is minimal. This is an good product and will last 1-2 years in continuous operation. The only down side is that as the pump gets older, it could malfunction and run continuously in the absence of any water in the bilge. Two batteries -wired independently- are a must in any boat that has a working automatic bilge pump installed.

1 of 1 people found the following review helpful:

5.0 out of 5 stars Rule 25S 500 Auto Marine Bilge Pump, July 9, 2010

By 

Steven H. Zysman (Amston, CT USA) - See all my reviews

Amazon Verified Purchase

This review is from: Rule 25S Marine Rule 500 Automatic Marine Bilge Pump (500-GPH, 12-Volt) (Sports)

The automatic feature works as described. I installed it in my basement dehumidifier such that the water gets pumped up 5 ft. and then outside the house. Saves the hastle of emptying the container every couple of days. The pump has no problem handling the head loss and the flow is strong.Rule 25S Marine Rule 500 Automatic Marine Bilge Pump (500-GPH, 12-Volt)