---
product_id: 54791544
title: "Rule 35A A-Matic Bilge Pump Float Switch, Mercury,White"
brand: "rule"
price: "€ 84.21"
currency: EUR
in_stock: true
reviews_count: 12
category: "Rule"
url: https://www.desertcart.pt/products/54791544-rule-35a-a-matic-bilge-pump-float-switch-mercury-white
store_origin: PT
region: Portugal
---

# Automatic bilge pump activation 12-24 VDC power compatibility Corrosion-resistant marine-grade build Rule 35A A-Matic Bilge Pump Float Switch, Mercury,White

**Brand:** rule
**Price:** € 84.21
**Availability:** ✅ In Stock

## Summary

> 🚤 Stay afloat effortlessly with Rule 35A — your boat’s silent guardian!

## Quick Answers

- **What is this?** Rule 35A A-Matic Bilge Pump Float Switch, Mercury,White by rule
- **How much does it cost?** € 84.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/54791544-rule-35a-a-matic-bilge-pump-float-switch-mercury-white)

## 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

- • **Plug & Play Installation:** Removable base and simple wiring make setup and maintenance a breeze.
- • **Built to Brave the Elements:** Marine-grade, mercury-free construction ensures durability in the harshest conditions.
- • **Effortless Water Management:** Automatically triggers your bilge pump to keep your vessel dry without manual checks.
- • **Precision Activation Every Time:** Reliable float switch technology guarantees pump engagement exactly when needed.
- • **Trusted by Thousands of Boaters:** 4.7-star rating from over 1,600 reviews proves unmatched performance and peace of mind.

## Overview

The Rule 35A A-Matic Bilge Pump Float Switch is a mercury-free, corrosion-resistant marine-grade device designed for automatic bilge pump activation at 12-24 VDC. With easy installation and dependable performance, it safeguards boats by efficiently managing water levels, backed by a 4.7-star rating from over 1,600 users.

## Description

From the manufacturer Rule pumps deliver reliable, high-performance water management solutions. Trusted by boaters and adventurers alike, Rule pumps provide efficient, automatic water removal with durable construction, ensuring long-lasting operation in tough environments. Whether you’re keeping a bilge dry or managing onboard water systems, Rule pumps offer peace of mind through advanced design and proven dependability, helping you stay safe and without worry.

Review: Five Stars - good and effective
Review: I bought several from other store before, but there were always some points that disappointed me. but this time, I am very satisfied with this product. - So far so good. So far this has worked great for us Super fast shipping! That is what you have been looking for Good value for price I like this so much,I now have two

## Features

- Reliable Automatic Bilge Control: The Rule 35A Marine Rule-A-Matic Switch ensures automatic activation of your bilge pump when water levels rise, preventing manual checks and safeguarding your vessel against unexpected water accumulation.
- Durable, Marine-Grade Construction: Built to withstand harsh marine environments, this bilge pump switch is mercury free and features corrosion-resistant components, including a robust housing and high-quality wiring, ensuring long-lasting performance.
- Easy Installation and Hassle-Free Use: Designed for straightforward setup, the Rule-A-Matic switch features a removeable base that integrates seamlessly into your boat's bilge system and is easy to clean or service. With simple wiring and clear instructions, installation is quick and convenient.
- Dependable Performance in Every Condition: Engineered for reliability, this float switch activates your bilge pump precisely when needed, ensuring smooth operation whether you’re at the dock or on open water.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000O8DA3M |
| Brand | Rule |
| Colour | One |
| Country of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 1,618 Reviews |
| Global Trade Identification Number | 00042237095435 |
| Included Components | Rule 35A Rule-A-Matic Float Switch - 12-24 VDC |
| Item Dimensions L x W x H | 8.9L x 12.7W x 21H centimetres |
| Item Type Name | Rule 35A Rule-A-Matic Float Switch - 12-24 VDC |
| Item Weight | 113 g |
| Manufacturer | Rule |
| Material | Plastic |
| Model Number | 35 |
| Part Number | RM500B |
| Power source | Corded Electric |
| Product Style | Bilge Pumps Switches |
| Product dimensions | 8.9L x 12.7W x 21H centimetres |
| Style | Bilge Pumps Switches |
| UPC | 696582485641 042237095435 617297076870 666668135845 042237083722 071030261204 773975400198 611104328671 779421381288 042237106230 014445389231 012304410966 826713868894 675904094815 072090742719 826713868900 963041571116 |
| Unit Count | 1.0 count |
| Usage | Boating, Water Treatment, Cruising, Rainy Conditions, Emergencies, Traveling |
| Voltage | 12 Volts (DC) |

## Product Details

- **Brand:** Rule
- **Colour:** One
- **Global Trade Identification Number:** 00042237095435
- **Item weight:** 113 g
- **Material:** Plastic
- **Number of Packs:** 1
- **Power source:** Corded Electric
- **Product dimensions:** 8.9L x 12.7W x 21H centimetres
- **Style:** Bilge Pumps Switches
- **Voltage:** 12 Volts (DC)

## Images

![Rule 35A A-Matic Bilge Pump Float Switch, Mercury,White - Image 1](https://m.media-amazon.com/images/I/41fUsHCz1QL.jpg)
![Rule 35A A-Matic Bilge Pump Float Switch, Mercury,White - Image 2](https://m.media-amazon.com/images/I/41y+CzQhifL.jpg)
![Rule 35A A-Matic Bilge Pump Float Switch, Mercury,White - Image 3](https://m.media-amazon.com/images/I/51jbMRg4y0L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Five Stars
*by K***W on 10 December 2014*

good and effective

### ⭐⭐⭐⭐⭐ I bought several from other store before, but there were always some points that disappointed me. but this time, I am very satisfied with this product.
*by J***Y on 29 August 2017*

So far so good. So far this has worked great for us Super fast shipping! That is what you have been looking for Good value for price I like this so much,I now have two

### ⭐⭐⭐⭐ Its good
*by C***E on 9 December 2012*

Although a bit light in weight it does the job well, I attached a magnet to the bottom of it to keep it attached to my steel hull of my narrow boat.., It works well no problems

## Frequently Bought Together

- Rule 35A Marine Rule-A-Matic Switch (Mercury Free)
- Rule High-Performance 1500GPH, 12 Volt Water Pump for Boats - Bilge Pump with Pressure Switch, Submersible Pump, and Float Switch - Ideal for Marine Accessories, Boating supplies, and Bilge Pumps
- Rule 2000 GPH Bilge Pump 12V - Submersible Marine Boat Accessory with 1-1/8" Discharge, Anti-Airlock, Reliable Ignition Protection, Silent Operation, Easy-Clean Strainer - Rust/Corrosion Resistant

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**Shop now:** [https://www.desertcart.pt/products/54791544-rule-35a-a-matic-bilge-pump-float-switch-mercury-white](https://www.desertcart.pt/products/54791544-rule-35a-a-matic-bilge-pump-float-switch-mercury-white)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-07-07*