---
product_id: 57503328
title: "Optimum Pool Technologies® Gas Shutoff Switch Compatible Replacement for Pentair MasterTemp & Max-E-Therm Heaters - Compatible Replacement for 42002-0025S"
brand: "optimum pool technologies"
price: "£28.26"
currency: GBP
in_stock: true
reviews_count: 1
url: https://www.desertcart.co.uk/products/57503328-optimum-pool-technologies-gas-shutoff-switch-compatible-replacement-for-pentair
store_origin: GB
region: United Kingdom
---

# 140°F precision gas shutoff Direct replacement for OEM parts 42002-0025S & 42001-0064S Fits all Pentair MasterTemp & Max-E-Therm models Optimum Pool Technologies® Gas Shutoff Switch Compatible Replacement for Pentair MasterTemp & Max-E-Therm Heaters - Compatible Replacement for 42002-0025S

**Brand:** optimum pool technologies
**Price:** £28.26
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay cool, stay safe—upgrade your pool heater’s brain!

## Quick Answers

- **What is this?** Optimum Pool Technologies® Gas Shutoff Switch Compatible Replacement for Pentair MasterTemp & Max-E-Therm Heaters - Compatible Replacement for 42002-0025S by optimum pool technologies
- **How much does it cost?** £28.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/57503328-optimum-pool-technologies-gas-shutoff-switch-compatible-replacement-for-pentair)

## Best For

- optimum pool technologies enthusiasts

## Why This Product

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

## Key Features

- • **OEM-Grade Replacement:** Engineered to match original parts 42002-0025S & 42001-0064S for flawless performance.
- • **Effortless Installation:** Designed for quick swap-out, minimizing downtime and maximizing pool time.
- • **Universal Compatibility:** Seamlessly fits all Pentair MasterTemp and Max-E-Therm heater models—no guesswork needed.
- • **Precision Safety Control:** Automatically shuts off gas at 140°F for ultimate pool heater safety.
- • **Trusted Independent Quality:** Crafted by Optimum Pool Technologies, ensuring reliable aftermarket excellence.

## Overview

This Optimum Pool Technologies gas shutoff switch is a precision-engineered, compatible replacement for Pentair MasterTemp and Max-E-Therm pool heaters. It automatically cuts gas flow at 140°F, ensuring safe operation. Designed to fit all relevant models and replace OEM parts 42002-0025S & 42001-0064S, it offers a reliable, easy-to-install aftermarket solution trusted by pool pros.

## Description

Full description not available

## Features

- Gas Shutoff Switch (140°F) Compatible Replacement for Pentair Sta-Rite MasterTemp & Max E Therm Pool Heaters
- Compatible Replacement for Part No. 42002-0025S & 42001-0064S
- Compatible Replacement for: Pentair MasterTemp (All Models) & Max-E-Therm (Models SR200, SR333, SR400) Heaters
- Manufactured by Optimum Pool Technologies
- NOTE: This is a compatible aftermarket replacement part. The manufacturers' names and part numbers have been used for reference purposes only. Optimum Pool Technologies Inc is an independent brand.

## Images

![Optimum Pool Technologies® Gas Shutoff Switch Compatible Replacement for Pentair MasterTemp & Max-E-Therm Heaters - Compatible Replacement for 42002-0025S - Image 1](https://m.media-amazon.com/images/I/31qGgXL5naL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    works great
  

*by W***M on Reviewed in the United States on April 1, 2019*

just what i needed

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---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-17*