---
product_id: 24172770
title: "Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch"
brand: "watts"
price: "$439.93"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/24172770-watts-lf25aub-z3-water-pressure-reducing-valve-npt-female-union
store_origin: US
region: United States of America
---

# Lead-free design Easy installation Thermal protection Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch

**Brand:** watts
**Price:** $439.93
**Availability:** ✅ In Stock

## Summary

> 💦 Every drop matters—make yours count!

## Quick Answers

- **What is this?** Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch by watts
- **How much does it cost?** $439.93 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/24172770-watts-lf25aub-z3-water-pressure-reducing-valve-npt-female-union)

## Best For

- watts enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Setup:** Versatile connections for quick and easy installation.
- • **Adjustable Precision:** Customize pressure settings from 25 to 75 psi.
- • **Protect Your Plumbing:** Reduce incoming water pressure to safeguard your systems.
- • **Sustainable Solutions:** Conserve water while ensuring safety and efficiency.
- • **Stay Cool Under Pressure:** Thermal expansion bypass for optimal performance.

## Overview

The WattsLF25AUB-Z3 Water Pressure Reducing Valve is a lead-free, 1/2 inch valve designed to reduce incoming water pressure, protect plumbing systems, and promote water conservation. It features easy installation with multiple connection options, thermal expansion protection, and adjustable pressure settings, making it ideal for various applications.

## Description

Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch

## Features

- LEAD-FREE WATER PRESSURE REDUCTION: The Watts 1/2" Lead-Free Water Pressure Reducing Valve reduces incoming water pressure to protect plumbing systems and reduce water consumption in commercial, industrial, and residential applications. This assembly includes a removable integral stainless steel strainer, replaceable seat module, thermal expansion bypass, high-temperature diaphragm, and a sealed spring case with stainless steel cage screws for waterwork pit installations.
- EASY INSTALLATION AND MAINTENANCE: With versatile end connection options such as PEX, CPVC, and Quick-Connect, this lead-free water pressure reducing valve is designed for straightforward installation with easy handling and in-line serviceability, featuring an NPT female union inlet by NPT female outlet that simplifies the installation process.
- THERMAL EXPANSION PROTECTION: The valve includes a bypass feature that effectively controls thermal expansion pressure, permitting the flow of water back through the valve into the main when pressures - due to thermal expansion on the outlet side of the valve - exceed the pressure in the main supply. It has an operating temperature range of 33° F (0.5° C) to 180° F (82° C).
- VERSATILE PRESSURE ADJUSTMENT: This valve is suitable for pressures up to 300 psi (20.7 bar) and allows for an adjustable pressure range between 25 to 75 psi (172 to 517 kPa), with a standard setting at 50 psi (345 kPa).
- EVERY DROP COUNTS: Water. It's in our name and close to our hearts. Since 1874, Watts Water Technologies has been delivering innovative technologies that make the world's most precious resource safe and accessible. Everything we design is made to keep the Earth's most precious resource safer, cleaner, and more useful for our customers. Our family of brands offers one of the most varied product lines in the world, with world-class, water-related solutions.

## Product Details

- **Material:** Brass
- **Brand:** Watts
- **Item dimensions L x W x H:** 1 x 1 x 1 inches
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Outlet Connection Type:** FNPT
- **Maximum Operating Pressure:** 3E+2 Pound per Square Inch
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.5 Inches

## Images

![Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch - Image 1](https://m.media-amazon.com/images/I/61sq+R30QEL.jpg)
![Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch - Image 2](https://m.media-amazon.com/images/I/71v4MQ+0dlL.jpg)
![Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch - Image 3](https://m.media-amazon.com/images/I/71Hna6RkpJL.jpg)

## Available Options

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

## Frequently Bought Together

- Watts LF25AUB-Z3 Water Pressure Reducing Valve NPT Female Union x NPT Female, Polymer Seat, 1/2 Inch
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- CARBO Instruments 2-1/2" Pressure Gauge,Water Pressure Test Gauge, 3/4" Female Hose Thread, 0-200 PSI with Red Pointer

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-24*