---
product_id: 133369520
title: "One Way Check Valve 1/2\" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System"
brand: "metalandbrassco"
price: "₩21221"
currency: KRW
in_stock: true
reviews_count: 8
category: "Metalandbrassco"
url: https://www.desertcart.kr/products/133369520-one-way-check-valve-1-2-female-backflow-preventer-check
store_origin: KR
region: South Korea
---

# Float mechanism for smooth one-way flow 1/2" NPT female thread Heavy-duty brass corrosion resistant One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System

**Brand:** metalandbrassco
**Price:** ₩21221
**Availability:** ✅ In Stock

## Summary

> 🚰 Keep your flow flawless and your system safe with brass-backed reliability!

## Quick Answers

- **What is this?** One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System by metalandbrassco
- **How much does it cost?** ₩21221 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/133369520-one-way-check-valve-1-2-female-backflow-preventer-check)

## Best For

- metalandbrassco enthusiasts

## Why This Product

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

## Key Features

- • **Silent Flow Tech:** Float-type design minimizes water hammer and pressure fluctuations for whisper-quiet operation.
- • **Versatile Protection:** Ideal for water heaters, boilers, HVAC, and circulation systems to prevent costly backflow damage.
- • **Precision Fit, No Fuss:** Standard 1/2" female NPT threading ensures seamless installation for pros and DIYers alike.
- • **Upgrade Your System Instantly:** No special tools needed—quickly replace or repair your check valve and avoid downtime.
- • **Built to Last, Built to Perform:** Crafted from reinforced brass, engineered to resist corrosion and handle high-pressure plumbing systems.

## Overview

This 1/2" female NPT brass check valve features a reinforced float mechanism designed to prevent backflow in residential and commercial plumbing, heating, and boiler systems. Durable and corrosion-resistant, it ensures smooth, quiet one-way water flow, protecting your equipment from pressure fluctuations and contamination. Easy to install without special tools, it’s the smart upgrade for reliable, long-term plumbing performance.

## Description

One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System: desertcart.com: Industrial & Scientific

Review: Very Well Made - Great little solid brass check valve. Not sure exactly what the cracking pressure is but I'm guessing around 10 because it's pretty tight. A little too tight for use on a RV pump but perfect for street pressure in a house.
Review: 1/2 in brass check valve - good quality brass valve, expect good performance,

## Features

- 1/2" NPT female thread brass check valve prevents backflow in water, boiler, and heating systems; ideal for residential or commercial plumbing setups requiring reliable one-way flow control.
- Constructed from heavy-duty brass with reinforced float mechanism for durability, corrosion resistance, and long-term performance in hot and cold water applications and pressurized systems.
- Float-type design provides smooth and quiet operation, reducing water hammer and pressure fluctuations; compatible with most standard plumbing, pump, or water heater installations.
- Easy to install with standard 1/2 inch female NPT connections; no special tools required—perfect for DIYers and professionals looking to upgrade or repair system check valves quickly.
- Suitable for water heaters, circulation systems, boilers, or HVAC setups; helps protect equipment by allowing one-way water flow and preventing contamination from back pressure.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QLXDMNP |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #238,533 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #535 in Check Valves |
| Brand | Metalandbrassco |
| Customer Reviews | 4.0 4.0 out of 5 stars (68) |
| Date First Available | April 11, 2019 |
| Exterior Finish | Copper,Metal,Plastic,Stainless Steel |
| Inlet Connection Size | 0.5 Inches |
| Inlet Connection Type | threaded |
| Item Weight | 3.52 ounces |
| Item model number | 1234567 |
| Manufacturer | Metalandbrassco |
| Material | Brass |
| Measurement System | inch |
| Number of Ports | 2 |
| Outlet Connection Size | 0.5 Inches |
| Outlet Connection Type | FNPT |
| Package Dimensions | 2.87 x 1.42 x 1.18 inches |
| Part Number | 1234567 |
| Size | 1/2 inch |
| UPC | 719243833312 |

## Product Details

- **Brand:** Metalandbrassco
- **Exterior Finish:** Copper,Metal,Plastic,Stainless Steel
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** threaded
- **Manufacturer:** Metalandbrassco
- **Material:** Brass
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.5 Inches
- **Outlet Connection Type:** FNPT
- **UPC:** 719243833312

## Images

![One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System - Image 1](https://m.media-amazon.com/images/I/51AhyZT3QuL.jpg)
![One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System - Image 2](https://m.media-amazon.com/images/I/51dp3g6Ut0L.jpg)
![One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System - Image 3](https://m.media-amazon.com/images/I/516FkqVF0UL.jpg)
![One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System - Image 4](https://m.media-amazon.com/images/I/81UFmS-4kjL.jpg)
![One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System - Image 5](https://m.media-amazon.com/images/I/81AlxVlX3GL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very Well Made
*by V***N on July 10, 2021*

Great little solid brass check valve. Not sure exactly what the cracking pressure is but I'm guessing around 10 because it's pretty tight. A little too tight for use on a RV pump but perfect for street pressure in a house.

### ⭐⭐⭐⭐ 1/2 in brass check valve
*by E***O on March 3, 2025*

good quality brass valve, expect good performance,

### ⭐⭐⭐⭐⭐ Worked perfectly
*by J***R on April 27, 2023*

Fit in tight space, working perfect.

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---

*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-05*