---
product_id: 252485685
title: "McDonnell & Miller 173502 (Product Number)"
brand: "mcdonnell & miller"
price: "15506.73 DT"
currency: TND
in_stock: true
category: "Mcdonnell & Miller"
url: https://www.desertcart.tn/products/252485685-mcdonnell-and-miller-173502-product-number
store_origin: TN
region: Tunisia
---

# Snap action for high-temp service Versatile NPT tapings for easy installation Corrosion-resistant Monel bellows McDonnell & Miller 173502 (Product Number)

**Brand:** mcdonnell & miller
**Price:** 15506.73 DT
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead with precision water level control — because your boiler deserves the best!

## Quick Answers

- **What is this?** McDonnell & Miller 173502 (Product Number) by mcdonnell & miller
- **How much does it cost?** 15506.73 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/252485685-mcdonnell-and-miller-173502-product-number)

## Best For

- mcdonnell & miller enthusiasts

## Why This Product

- Trusted mcdonnell & miller brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **High-Temp Ready:** Snap action mechanism designed to perform flawlessly under extreme temperatures.
- • **Precision Control:** Dual switches provide reliable pump control and low water cut-off alarm for safety.
- • **Seamless Integration:** Multiple NPT tapings and BSPT threads fit a wide range of residential, commercial, and industrial boilers.
- • **Unmatched Durability:** Monel bellows ensure long-lasting corrosion resistance in any boiler environment.
- • **Customizable Operation:** Optional manual reset and integral conductance probes for enhanced control and flexibility.

## Overview

The McDonnell & Miller Series 157 Low Water Cut-off/Pump Controller 157-S is a robust, corrosion-resistant device designed for all boiler sizes and pressures. Featuring Monel bellows, snap action for high-temperature reliability, and versatile tapings, it ensures precise pump control and safety alarms. Optional advanced features like manual reset and conductance probes make it a top-tier choice for residential, commercial, and industrial boiler applications.

## Description

McDonnell & Miller Series 157 Low Water Cut-off/Pump Controller 157-S For residential, commercial and industrial low or high pressure boiler applications. For boilers of any steaming capacity. Monel bellows provides corrosion resistance. Float chamber with integral water column provided Snap action for high temperature service - 1 Single pole, single throw switch for pump control - 1 Single pole, double throw switch for low water cut-off and alarm actuation. Optional features - Manual reset - Integral conductance probes for additional levels and greater operating differential-Model 157S-RBP-MD - 1 or 1-1/4 NPT equalizing tapings - 1/2 or 3/4 NPT tapings for gauge glass/tri-cock installations. BSPT threads. Maximum pressure 150 psi (10. 5 kg/cm2). Made in the USA .

## Features

- McDonnell & Miller Series 157 Low Water Cut-off/Pump Controller 157-S For residential, commercial and industrial low or high pressure boiler applications
- For boilers of any steaming capacity
- Monel bellows provides corrosion resistance
- Float chamber with integral water column provided Snap action for high temperature service - 1 Single pole, single throw switch for pump control - 1 Single pole, double throw switch for low water
- Optional features - Manual reset - Integral conductance probes for additional levels and greater operating differential-Model 157S-RBP-MD - 1 or 1-1/4 NPT equalizing tapings - 1/2 or 3/4 NPT tapings

## Images

![McDonnell & Miller 173502 (Product Number) - Image 1](https://m.media-amazon.com/images/I/61RZQFfbWcL.jpg)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-21*