---
product_id: 57820661
title: "Rule Rule-A-Matic Plus Float Switch, Covered, Moisture Tight Seals"
brand: "rule"
price: "¥28558"
currency: JPY
in_stock: true
reviews_count: 8
category: "Rule"
url: https://www.desertcart.jp/products/57820661-rule-rule-a-matic-plus-float-switch-covered-moisture-tight
store_origin: JP
region: Japan
---

# Activates at 2" water level Supports pumps up to 20A Impact-resistant cover Rule Rule-A-Matic Plus Float Switch, Covered, Moisture Tight Seals

**Brand:** rule
**Price:** ¥28558
**Availability:** ✅ In Stock

## Summary

> 🌊 Stay dry, stay ahead — the ultimate float switch for pros who demand reliability!

## Quick Answers

- **What is this?** Rule Rule-A-Matic Plus Float Switch, Covered, Moisture Tight Seals by rule
- **How much does it cost?** ¥28558 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/57820661-rule-rule-a-matic-plus-float-switch-covered-moisture-tight)

## 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

- • **Built-In Test Feature:** Easily verify functionality anytime, giving you peace of mind and preventing unexpected failures.
- • **Powerful Compatibility:** Designed to handle pumps drawing up to 20 amps, perfect for demanding bilge pump setups.
- • **Marine-Grade Durability:** 14 gauge highly abrasive resistant wire built to withstand tough, moisture-rich conditions without fail.
- • **Rugged Protection, Zero Jams:** Impact-resistant cover shields against debris and ensures smooth operation even in harsh marine environments.
- • **Precision Water Level Control:** Automatically activates at 2" and deactivates at 3/4" water levels for reliable flood prevention.

## Overview

The Rule Rule-A-Matic Plus Float Switch combines rugged, impact-resistant design with marine-grade wiring to deliver reliable pump control for water levels between 2" and 3/4". Supporting pumps up to 20 amps and featuring a built-in test function, it’s engineered for durability and precision in demanding aquatic environments.

## Description

Sleek and rugged, the Rule-A-Matic Plus float switch has a strong, fully integrated, impact resistant cover that protects against debris and jamming. It features 14 gauge highly abrasive resistant marine grade wire and a built-in test feature. Designed for pumps drawing up to 20 Amps. Both the 40A and 40FA now include a 2 year warranty

Review: Replacement required - I had to buy this as a replacement. The old unit would rise on the water level and as the float dropped it would not turn off the pump. If they were to make the float valve easy access then regularly maintenance could have been carried out to clear scale build up on float switch . Easy to fit . Comes with a lengthy power lead
Review: Boat bulge float - Just as listed

## Features

- Sleek and rugged with a strong, fully integrated impact resistant cover to protect against debris and jamming
- 14 gauge highly abrasive resistant marine grade wire
- Built-in test feature
- Designed for pumps drawing up to 20 amps
- Will turn the pump on when the water level reaches 2" (51mm) and will turn the pump off when water level falls to 3/4" (19mm).Can also be used to operate high water alarm systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000O8DA0K |
| Batteries included? | No |
| Best Sellers Rank | 196,684 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 149 in Boat Bilge Pumps |
| Brand | Rule |
| Color | White |
| Compatible with | No |
| Customer Reviews | 4.6 4.6 out of 5 stars (969) |
| Date First Available | 13 Aug. 2010 |
| Department | Switch |
| Features | Not_Performance_Used |
| Height | 6 inches |
| Included components | Rule 40A Rule-A-Matic Plus Bilge Pump Float Switch, 12, 24 or 32 Volt, Moisture Tight Seals |
| Is discontinued by manufacturer | No |
| Item display length | 6 inches |
| Item display width | 6 inches |
| Item model number | RFA-40A |
| Manufacturer | Rule |
| Material type | Stainless Steel |
| Number of items | 1 |
| Number of pieces | 1 |
| Power source | electricity |
| Product Dimensions | 22.86 x 15.24 x 10.16 cm; 181.44 g |
| Seasons | All-Season |
| Shape | as shown |
| Size | S |
| Sport | Boating |
| Style | Float Switch |
| Usage | SportingGoods |
| Weight | 227 g |

## Product Details

- **Brand:** Rule
- **Colour:** White
- **Global Trade Identification Number:** 00042237095633
- **Item weight:** 6.4 Ounces
- **Material:** Stainless Steel
- **Maximum flow rate:** 5678 Litres Per Hour
- **Power source:** electricity
- **Product dimensions:** 12.4L x 7W x 7H centimetres
- **Style:** Float Switch
- **Voltage:** 32 Volts

## Images

![Rule Rule-A-Matic Plus Float Switch, Covered, Moisture Tight Seals - Image 1](https://m.media-amazon.com/images/I/41A9XkhDupL.jpg)

## Available Options

This product comes in different **Style** 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

### ⭐⭐⭐⭐⭐ Replacement required
*by K***E on 7 September 2023*

I had to buy this as a replacement. The old unit would rise on the water level and as the float dropped it would not turn off the pump. If they were to make the float valve easy access then regularly maintenance could have been carried out to clear scale build up on float switch . Easy to fit . Comes with a lengthy power lead

### ⭐⭐⭐⭐⭐ Boat bulge float
*by B***P on 19 November 2019*

Just as listed

### ⭐⭐⭐⭐ prompt delivery
*by J***K on 27 July 2020*

This item was a replacement for a previous unit. It arrived promptly in Sardinia and performed exactly as I had expected

## 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 Japan*
*Store origin: JP*
*Last updated: 2026-02-20*