---
product_id: 514811805
title: "John Guest Push Fit Single Check Valve 12mm (12SCV)"
brand: "john guest"
price: "€ 33.10"
currency: EUR
in_stock: true
reviews_count: 12
category: "John Guest"
url: https://www.desertcart.nl/products/514811805-john-guest-push-fit-single-check-valve-12mm-12scv
store_origin: NL
region: Netherlands
---

# 12mm precision fit One-way flow control Durable brass build John Guest Push Fit Single Check Valve 12mm (12SCV)

**Brand:** john guest
**Price:** € 33.10
**Availability:** ✅ In Stock

## Summary

> 🔧 Keep your water flow flawless with the ultimate one-way valve!

## Quick Answers

- **What is this?** John Guest Push Fit Single Check Valve 12mm (12SCV) by john guest
- **How much does it cost?** € 33.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/514811805-john-guest-push-fit-single-check-valve-12mm-12scv)

## Best For

- john guest enthusiasts

## Why This Product

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

## Key Features

- • **Precision 12mm Fit:** Engineered for a perfect push-fit connection with John Guest fittings
- • **Seamless One-Way Flow:** Prevents backflow to protect your water heater’s input line
- • **Trusted Industry Leader:** John Guest brand, ranked #1 in check valves for reliability
- • **Robust Brass Construction:** Built to last with corrosion-resistant, high-quality brass material
- • **Compact & Efficient Design:** Small 23x23x69mm size fits discreetly into any plumbing setup

## Overview

The John Guest Push Fit Single Check Valve 12mm (12SCV) is a compact, brass non-return valve designed to ensure one-way water flow in heating systems. With a precise 12mm push-fit coupling, it prevents backflow, protecting your water heater’s input line. Trusted by professionals and ranked #1 in check valves, it combines durability, efficiency, and easy installation for seamless plumbing performance.

## Description

John Guest Single Check Valve 12mm. also known as a one-way valve or non-return valve. These are used with most water heating systems to prevent water exiting the heaters input line.

Review: Non return valve - Good price and perfect for the job required.
Review: Good product - Good product

## Features

- John Guest
- 12mm Fitting

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BX6GPBDQ |
| Best Sellers Rank | 2,613 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 1 in Check Valves |
| Brand | John Guest |
| Colour | Black |
| Connector Type | Coupling |
| Connector type | Coupling |
| Customer Reviews | 4.7 out of 5 stars 68 Reviews |
| Included Components | 1 Single Check Valve |
| Item Dimensions | 23 x 23 x 69 millimetres |
| Item Type Name | Single Check Valve |
| Item dimensions L x W x H | 23 x 23 x 69 millimetres |
| Manufacturer | John Guest |
| Material | Brass |
| Model Number | 12SCV |
| Number of Pieces | 1 |
| Size | Klein |
| Thread Size | 1/2 inch |
| Thread Type | UN |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** John Guest
- **Colour:** Black
- **Connector type:** Coupling
- **Item dimensions L x W x H:** 23 x 23 x 69 millimetres
- **Item weight:** 20 Grams
- **Material:** Brass
- **Number of pieces:** 1
- **Size:** Klein
- **Thread size:** 1/2 inch
- **Thread type:** UN

## Images

![John Guest Push Fit Single Check Valve 12mm (12SCV) - Image 1](https://m.media-amazon.com/images/I/31E-kc-+RJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Non return valve
*by A***T on 20 May 2026*

Good price and perfect for the job required.

### ⭐⭐⭐⭐⭐ Good product
*by D***N on 1 May 2026*

Good product

### ⭐⭐⭐⭐⭐ Good quality
*by 6***1 on 30 April 2026*

Good quality

## Frequently Bought Together

- John Guest Push Fit Single Check Valve 12mm (12SCV)
- John Guest PP Shut Off Valve Connection 12 mm (One Supplied)
- John Guest 12mm Equal Elbow Push-Fit Pipe Connector – Quick Connect Fitting for Water & Air Systems (Pack of 4)

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**Shop now:** [https://www.desertcart.nl/products/514811805-john-guest-push-fit-single-check-valve-12mm-12scv](https://www.desertcart.nl/products/514811805-john-guest-push-fit-single-check-valve-12mm-12scv)

---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-07-07*