---
product_id: 12031191
title: "Watts Brass & Tubular #9D-M3 1/2 1/2\" Backflow Preventer"
brand: "watts"
price: "S$198"
currency: SGD
in_stock: true
category: "Watts"
url: https://www.desertcart.sg/products/12031191-watts-brass-and-tubular-9d-m3-1-2-1-2
store_origin: SG
region: Singapore
---

# Reliable backflow prevention Suitable for hot & cold water 1/2 inch NPT union connection Watts Brass & Tubular #9D-M3 1/2 1/2" Backflow Preventer

**Brand:** watts
**Price:** S$198
**Availability:** ✅ In Stock

## Summary

> 🚰 Keep your flow flawless — because clean water is non-negotiable!

## Quick Answers

- **What is this?** Watts Brass & Tubular #9D-M3 1/2 1/2" Backflow Preventer by watts
- **How much does it cost?** S$198 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/12031191-watts-brass-and-tubular-9d-m3-1-2-1-2)

## 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

- • **Universal Fit:** 1/2 inch union FNPT x FNPT connection designed for seamless integration with smaller supply lines
- • **Precision Brass Build:** Durable brass body engineered for longevity and corrosion resistance
- • **Tight Seal Technology:** Primary check valve with rubber disc ensures zero backflow, protecting your potable water
- • **Versatile Application:** Ideal for labs, dairy, sterilizers, and boiler feed lines ensuring clean, uncontaminated water flow
- • **Continuous Pressure Ready:** Built to withstand continuous pressure for uninterrupted performance

## Overview

The Watts Brass & Tubular #9D-M3 1/2" Backflow Preventer is a robust, brass-bodied valve designed to prevent backflow in smaller supply lines. Featuring a 1/2 inch union FNPT connection and a rubber disc check valve, it ensures reliable protection for potable water in applications ranging from laboratory equipment to boiler feed lines. Suitable for both hot and cold water under continuous pressure, this device guarantees a tight seal and long-lasting performance.

## Description

1/2" Backflow Preventer

## Features

- WATTS 0950053 Check Valve, 1/2 in, Union FNPT x FNPT, Brass Body
- Specially made for smaller supply lines and ideally suited for laboratory equipment, processing tanks, sterilizers, dairy equipment and similar applications.
- It is particularly recommended for boiler feed lines to prevent backflow when supply pressure falls below system pressure.
- Suitable for use on hot or cold water and can be used under continuous pressure.
- It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000KLHK16 |
| Best Sellers Rank | #40,853 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #50 in Check Valves |
| Brand Name | Watts |
| Color | Stainless Steel,Brass |
| Connector Type | Union |
| Customer Reviews | 4.5 4.5 out of 5 stars (170) |
| Exterior Finish | Brass |
| Included Components | 1/2" Backflow Preventer |
| Item Dimensions | 4 x 3 x 2 inches |
| Item Type Name | TV733156 |
| Item Weight | 1.2 pounds |
| Manufacturer | Watts Brass & Tubular |
| Manufacturer Part Number | 9D-M3-1/2 |
| Material Type | Brass |
| Model Number | 9D-M3 1/2 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Size | 1/2 inch |
| Thread Type | NPT |
| UPC | 098268676815 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Watts
- **Color:** Stainless Steel,Brass
- **Connector Type:** Union
- **Exterior Finish:** Brass
- **Item Weight:** 1.2 pounds
- **Item dimensions L x W x H:** 4 x 3 x 2 inches
- **Material:** Brass
- **Number of Pieces:** 1
- **Size:** 1/2 inch
- **Thread Type:** NPT

## Images

![Watts Brass & Tubular #9D-M3 1/2 1/2" Backflow Preventer - Image 1](https://m.media-amazon.com/images/I/61cOWTVXLTL.jpg)
![Watts Brass & Tubular #9D-M3 1/2 1/2" Backflow Preventer - Image 2](https://m.media-amazon.com/images/I/410A6oQETZL.jpg)

## Frequently Bought Together

- Watts Brass & Tubular #9D-M3 1/2 1/2" Backflow Preventer
- Bell and Gossett 110192 Fb-38 Pressure Reducing Valve
- Hydro Master Automatic Air Vent Valve 1/8 Inch Brass

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**Shop now:** [https://www.desertcart.sg/products/12031191-watts-brass-and-tubular-9d-m3-1-2-1-2](https://www.desertcart.sg/products/12031191-watts-brass-and-tubular-9d-m3-1-2-1-2)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-11-05*