---
product_id: 4214077
title: "Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small"
brand: "rule"
price: "€ 82.37"
currency: EUR
in_stock: true
reviews_count: 8
category: "Rule"
url: https://www.desertcart.it/products/4214077-rule-40a-rule-a-matic-plus-bilge-pump-float-switch
store_origin: IT
region: Italy
---

# 12/24/32V multi-voltage compatibility Easy installation with adhesive-ready flat base Moisture-tight, impact-resistant cover Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small

**Brand:** rule
**Price:** € 82.37
**Availability:** ✅ In Stock

## Summary

> 🚤 Rule your bilge with confidence—power, protection, and precision in one sleek switch!

## Quick Answers

- **What is this?** Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small by rule
- **How much does it cost?** € 82.37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/4214077-rule-40a-rule-a-matic-plus-bilge-pump-float-switch)

## 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

- • **Rugged Durability:** Impact-resistant acrylic cover shields against debris and jamming, ensuring long-lasting performance.
- • **Moisture-Tight Seals:** Engineered to keep water out, protecting internal components and extending switch life.
- • **Precision Pump Control:** Automatically shuts off at half-inch bilge level to prevent battery drain and pump overuse.
- • **Effortless Installation:** Flat base designed for 3M 5200 adhesive application makes mounting quick and secure.
- • **Versatile Voltage Support:** Seamlessly powers your bilge pump at 12, 24, or 32 volts for ultimate flexibility.

## Overview

The Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch is a US-made, small-sized, white acrylic switch designed for 12, 24, or 32-volt systems. It features a moisture-tight, impact-resistant cover to prevent debris interference and jamming. With a flat base optimized for adhesive mounting, it ensures easy installation and reliable automatic pump control, shutting off at low water levels to protect your battery and bilge pump.

## Description

Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small

Review: It's just like the one that I took out.... - I bought this to replace an identical one in the bilge of our sailboat. It went into place with no problems. There's a flat spot on the bottom for you to apply your 3M 5200 adhesive, which is how my old one was attached. I cleaned the bilge really well, applied the adhesive, and put something heavy on top of the switch case. When I returned the next day, I hooked up the wires (easy) and it started right up. Unlike my old one, it shut down when the bilge level was drawn down to about a half-inch. Perfect. As boat maintenance goes, this was really simple, and I don't have to worry about a continually-running bilge pump bricking my battery. We'll mark this down as a win.
Review: High quality and works as advertised - I always use Rule pumps and switches on my boat because I think they are best made and are the most reliable. SeaRay installs them originally. They cost more than most, but maybe it's because of the quality. You can easily sink your boat if a pump or switch fails. Even though I think they are priced high, it's worth the money knowing they are reliable.

## Features

- Acrylic
- Made in the USA
- Sleek and rugged with a strong, fully integrated impact resistant cover to protect against debris and jamming

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Rule |
| Color | White |
| Material | Stainless Steel |
| Power Source | electricity |
| Product Dimensions | 4.87"L x 2.75"W x 2.75"H |
| Style | Float Switch |

## Product Details

- **Brand:** Rule
- **Color:** White
- **Global Trade Identification Number:** 00042237095633
- **Item Weight:** 6.4 Ounces
- **Material:** Stainless Steel
- **Maximum Flow Rate:** 5678 Liters Per Hour
- **Power Source:** electricity
- **Product Dimensions:** 4.87"L x 2.75"W x 2.75"H
- **Style:** Float Switch
- **Voltage:** 32 Volts

## Images

![Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small - Image 1](https://m.media-amazon.com/images/I/41A9XkhDupL.jpg)

## Available Options

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

## Questions & Answers

**Q: Where is the built in test feature?**
A: Hello Michael,
The test lever is on the rear, left side near the wires.
Regards,
Xylem.

**Q: How long are the lead wires**
A: Hello,
The wires on all of our Rule float switches are 28" long.
Regards,
Rule.

**Q: I have an older version of this that has a turn able knob on the side.  Any idea what this is used for?**
A: Hello,
The older float switch has a knob on the side so you can rotate and lift up the float inside to test the system.
Regards,
Xylem.

**Q: Is the hole spacing (and/or general dimensions) the same as on the older mercury switch rule-a-matic plus model?**
A: Hello Matthew,
The new float switch is slightly different from the old mercury float switch.
The mercury switch has a different hole pattern so you will only be able to use one of the holes from the old switch.
Regards,
Xylem.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It's just like the one that I took out....
*by M***E on July 21, 2024*

I bought this to replace an identical one in the bilge of our sailboat. It went into place with no problems. There's a flat spot on the bottom for you to apply your 3M 5200 adhesive, which is how my old one was attached. I cleaned the bilge really well, applied the adhesive, and put something heavy on top of the switch case. When I returned the next day, I hooked up the wires (easy) and it started right up. Unlike my old one, it shut down when the bilge level was drawn down to about a half-inch. Perfect. As boat maintenance goes, this was really simple, and I don't have to worry about a continually-running bilge pump bricking my battery. We'll mark this down as a win.

### ⭐⭐⭐⭐⭐ High quality and works as advertised
*by G***0 on December 4, 2023*

I always use Rule pumps and switches on my boat because I think they are best made and are the most reliable. SeaRay installs them originally. They cost more than most, but maybe it's because of the quality. You can easily sink your boat if a pump or switch fails. Even though I think they are priced high, it's worth the money knowing they are reliable.

### ⭐⭐⭐⭐⭐ Rule is the best in marine pumps and floats in my opinion
*by L***A on August 19, 2025*

Works as designed

## Frequently Bought Together

- Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals , White , Small
- 3M Marine Adhesive Sealant Fast Cure 5200 (06535) Permanent Bonding and Sealing for Boats and RVs Above and Below the Waterline Waterproof Repair, White, 1 fl oz Tube
- 3M TALC Marine Adhesive Sealant Fast Cure 4200 (05260) – Semi-Permanent Flexible Adhesive Sealant for Boats and Marine Applications – White – 3 Ounces

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-07*