---
product_id: 4139220
title: "Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install"
brand: "rule"
price: "1034 kr"
currency: NOK
in_stock: true
category: "Rule"
url: https://www.desertcart.no/products/4139220-rule-35a-marine-rule-a-matic-switch-12v-automatic-bilge
store_origin: NO
region: Norway
---

# 12-24V power compatibility Quick & easy installation Mercury-free, corrosion-resistant build Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install

**Brand:** rule
**Price:** 1034 kr
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install by rule
- **How much does it cost?** 1034 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/4139220-rule-35a-marine-rule-a-matic-switch-12v-automatic-bilge)

## 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 Setup:** Streamlined installation process means you’re protected faster, with zero hassle.
- • **Peace of Mind Onboard:** Trusted by thousands of boaters, this switch safeguards your vessel so you can focus on the journey.
- • **Marine-Grade Durability:** Built tough with mercury-free, corrosion-resistant materials designed to brave the harshest waters.
- • **Hands-Free Water Defense:** Automatically activates your bilge pump to keep your boat dry without lifting a finger.
- • **Reliable Float Activation:** Precision-triggered switch ensures your bilge pump runs exactly when needed, no false alarms.

## Overview

The Rule 35A Marine Rule-A-Matic Switch is a 12-24V automatic bilge pump float switch designed for reliable, hands-free water management. Featuring mercury-free, corrosion-resistant marine-grade construction, it ensures long-lasting durability in harsh environments. Easy to install and trusted by thousands, it activates your bilge pump precisely when water rises, protecting your vessel from flooding and providing peace of mind on every voyage.

## Description

Ensure your boat stays dry and protected with the Rule 35A Marine Rule-A-Matic Switch, a trusted solution for automatic bilge pump activation. Designed for seamless operation, this float switch automatically engages your bilge pump when water levels rise, providing hands-free water management and reducing the risk of flooding. Built with marine-grade materials, the mercury free Rule 35A is resistant to corrosion and harsh conditions, ensuring long-term durability and reliable performance in saltwater and freshwater environments. Its easy installation process makes it a practical choice for boat owners looking for a dependable, no-fuss solution to bilge water control. Whether you're a casual boater or a seasoned mariner, the Rule 35A Automatic Bilge Pump Switch offers peace of mind by keeping your bilge dry and your vessel safe. Pair it with a compatible 12V bilge pump for effortless water management on every journey.

## 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 for Hassle-Free Use: Designed for straightforward setup, the Rule-A-Matic switch integrates seamlessly into your boat's bilge system. 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 |
| Best Sellers Rank | #13,925 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #6 in Boat Bilge Pumps |
| Brand Name | Rule |
| Color | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,729) |
| Global Trade Identification Number | 00042237095435 |
| Included Components | Rule 35A Rule-A-Matic Float Switch - 12-24 VDC |
| Item Dimensions L x W x H | 8.38"L x 5.13"W x 3.25"H |
| Item Type Name | Rule 35A Rule-A-Matic Float Switch - 12-24 VDC |
| Item Weight | 13 g |
| Manufacturer | RULE |
| Manufacturer Part Number | RM500B |
| Manufacturer Warranty Description | 2 years |
| Material Type | Plastic |
| Model Number | 35 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Power Source | Corded Electric |
| Product Style | Bilge Pumps Switches |
| Specific Uses For Product | Boating, Traveling, Emergency, Cruise |
| UPC | 696582485641 042237095435 617297076870 666668135845 042237083722 071030261204 773975400198 611104328671 779421381288 014445389231 012304410966 826713868894 675904094815 072090742719 826713868900 963041571116 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Rule
- **Color:** White
- **Global Trade Identification Number:** 00042237095435
- **Item Weight:** 13 g
- **Manufacturer:** RULE
- **Material:** Plastic
- **Number of Packs:** 1
- **Power Source:** Corded Electric
- **Product Dimensions:** 8.38"L x 5.13"W x 3.25"H
- **Style:** Bilge Pumps Switches

## Images

![Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install - Image 1](https://m.media-amazon.com/images/I/41fUsHCz1QL.jpg)
![Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install - Image 2](https://m.media-amazon.com/images/I/31e-cI8FF2L.jpg)
![Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install - Image 3](https://m.media-amazon.com/images/I/31UJBrR+Y-L.jpg)
![Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install - Image 4](https://m.media-amazon.com/images/I/31hBR6keiQL.jpg)
![Rule 35A Marine Rule-A-Matic Switch - 12V Automatic Bilge Pump Switch - Mercury Free, Durable, Reliable, and Easy to Install - Image 5](https://m.media-amazon.com/images/I/71KspIdOY1L.jpg)

## Available Options

This product comes in different **Style** options.

## 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.no/products/4139220-rule-35a-marine-rule-a-matic-switch-12v-automatic-bilge](https://www.desertcart.no/products/4139220-rule-35a-marine-rule-a-matic-switch-12v-automatic-bilge)

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-18*