---
product_id: 517490577
title: "Rule 25S-Marine 500 Automatic Marine Bilge Pump"
brand: "rule"
price: "€ 8.74"
currency: EUR
in_stock: false
reviews_count: 11
url: https://www.desertcart.es/products/517490577-rule-25s-marine-500-automatic-marine-bilge-pump
store_origin: ES
region: Spain
---

# Automatic operation High pumping capacity Low power draw Rule 25S-Marine 500 Automatic Marine Bilge Pump

**Brand:** rule
**Price:** € 8.74
**Availability:** ❌ Out of Stock

## Summary

> 🚤 Dive into worry-free boating with Rule 25S-Marine!

## Quick Answers

- **What is this?** Rule 25S-Marine 500 Automatic Marine Bilge Pump by rule
- **How much does it cost?** € 8.74 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/517490577-rule-25s-marine-500-automatic-marine-bilge-pump)

## Best For

- rule enthusiasts

## Why This Product

- Trusted rule brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Reliable:** Crafted from stainless steel with a 3-year warranty for peace of mind.
- • **Compact & Lightweight:** Weighs only 4.64 ounces, perfect for easy installation.
- • **Energy Efficient Design:** Minimal power usage in checking mode, saving you energy.
- • **Effortless Water Management:** Automatically senses water, no manual switches needed.
- • **Unmatched Power & Longevity:** Delivers superior pumping capacity for smaller crafts.

## Overview

The Rule 25S-Marine 500 Automatic Marine Bilge Pump is a cutting-edge solution for water management in smaller crafts. With its automatic sensing technology, it operates without external switches, ensuring efficient performance. This pump boasts a high pumping capacity while maintaining a low power draw, making it both powerful and energy-efficient. Constructed from durable stainless steel and backed by a limited 3-year warranty, it’s designed for longevity and reliability on the water.

## Description

Product Description        Rule Submersible Bilge Pumps have set the standard for the industry for decades. They are the first choice of yachtsmen and fishermen throughout the world. More innovations in bilge pump design have come from Rule Industries than any other manufacturer, and they are proud to offer the broadest range of bilge pumps in the world.Compact, efficient, long-life motorsLimited three-year warrantyAbility to run dry for short periodsEasy-clean, snap-lock strainer basesStainless steel shaftsCompletely submersibleStainless steel shaft, completely submersible, rust and corrosion protectionMarine-grade blocked wiringRust and corrosion protectionSilent and vibrationless operationCE and ISO 8849 certificationIgnition protectionRemove the motor by pushing the side tabs, allowing easy access to clean the strainer and the impeller cavityElectronic sensing operation on the principle of impeller resistance. Float switches are not required. The pump will turn on every 2-1/2 minutes for about one second to sense for water. If water is present, the pump will sense resistance and continue to run until all water is removed. Thereafter, it will check for water every 2-1/2 minutes.          .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

## Features

- Pump operates automatically by sensing for water, no external switch required, electronic sensing operation on the principle of impeller resistance
- More pumping capacity and more exclusive design features than any comparable competitive pump at a lower cost
- Power use in the checking mode is minimal
- Especially popular on smaller craft, Rule 500 pumps are unmatched in pumping power and longevity
- 1.9 amp draw; 2.5 amp fuse, 3/4 inch discharge, limited 3 year warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 7 x 6.8 x 3.7 inches |
| Package Weight | 0.44 Kilograms |
| Item Dimensions  LxWxH | 7 x 6 x 3 inches |
| Item Weight | 4.64 Ounces |
| Brand Name | Boating Accessories |
| Model Name | 25S |
| Color | Red/White/Blue |
| Material | Stainless Steel |
| Number of Items | 1 |
| Manufacturer | Rule |
| Part Number | 25S |
| Style | 12 Volt |
| Included Components | Bilge Pump |
| Sport Type | Boating |

## Images

![Rule 25S-Marine 500 Automatic Marine Bilge Pump - Image 1](https://m.media-amazon.com/images/I/81N6LinDKIL.jpg)
![Rule 25S-Marine 500 Automatic Marine Bilge Pump - Image 2](https://m.media-amazon.com/images/I/31rneIS3qkL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great Sump-Pump Substitute for tight places
  

*by G***E on Reviewed in the United States on May 20, 2015*

We bought a house a year ago and started experiencing minor flooding in the basement.  We managed to track down the source of the water to a 4"x 4" Gravity drain that was backing up and flooding when it rained hard and when the washer emptied.  Obviously 4x4 was too small for any sump pump to get into and so we started saving up for the 10K it will take to fix the basement.A few months ago when everything thawed and the flooding got worst I resolved to find a stop gap.  After checking some forums I found some folks trying this bilge pump.  I ordered it and a 12-volt power converter and set it up.Since I set it up there have been zero flooding even during the spring rains.  The pump kicks on automatically every 2 1/2 minutes, if it feels water it pumps it dry, shuts off, and waits another 2 1/2 minutes.  Our flooding was always prefaced with a build up of ground water into the drain so this pump it tucked down far enough to kick on as soon as water starts building up.Let me be clear if this is what you intend to use it for.  It is not an out of box solution.  You will need a basic understanding of hooking up electronics.  You will need to connect the leads to post terminals and all that without instructions but that is what it is.It is not a solution to a habitually flooding basement but it is a cheap and workable stop gap solution between flooding and dropping lots of money for the permanent fix.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Reliable & Long Lasting
  

*by B***A on Reviewed in the United States on February 5, 2011*

I've used these automatic Rule pumps aprox 25 years, originally it was known as the Platinum Series.  They have proven to be reliable & long lasting.  On my boat the pump was installed in the low spot of the bilge (at rest).  You could hear it cycle every few minutes.  The boat had twin batteries & always had a trickle charger to keep the batteries topped-off.  My commerical building had a sump built into the lowest corner of the concrete slab.  Due to large amounts of salt water the metal (110vac) sump pumps lasted approx 3 years, after several expensive pumps I decided to try the same automatic Rule bilge pump used in the boat.  The Rule pump was powered by a 12v battery charger & worked fine manually, but never automatically (long lasting never had to be replaced). A spare pump was kept as a back-up & I took it with me when I retired.  The house has a low spot at the edge of the driveway  just in front of the garage door & the garage would flood with enough rain. I constructed a drain sump & used the spare auto Rule bilge pump (powered with a 12v battery charger).  Again the pump worked manually, but not automatically so I decided to try a 12vdc power supply (thinking maybe the automatic circuit needed a cleaner constant 12vdc).  Problem solved, the pump cycles & pumps the sump & returns to sensing mode automatically.  This set-up has proven so reliable & necessary a back-up pump was ordered from Amazon.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    I had no room for a separate float switch and this fits into the existing base of the Rule pump already installed.
  

*by B***M on Reviewed in the United States on September 22, 2014*

Perfect fit in the sump of my Boston Whaler Supersport 13. The blue base was identical to the existing Rule bilge pump, so the new pump slipped in beautifully. The only difference between this pump and its predecessor is an extra wire that goes directly to the battery (it should be protected by a fuse, but I skipped this). The wiring diagram is clear and the pump works as advertised. Every two and a half minutes, it cycles on momentarily. If the bilge is dry, it goes off within two seconds. If it meets resistance (i.e. if there is water to be removed from the bilge), it runs until the resistance disappears. I have not had any issue with battery drain, even when leaving the boat unused for three weeks. The draw is insignificant. Highly recommended!Update: Pump crapped out after two seasons, which is a real disappointment. However, because it's great when it works, and not that expensive, I bought another.

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-03-03*