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John Guest 12mm Single Check Valve

John Guest 12mm Single Check Valve

SKU: 800-02032
$34.00

Universal – suitable for caravans, motorhomes, 4WD water systems, marine and off-grid plumbing setups


1 x John Guest 12mm Single Check Valve

12mm - Compact inline fitting designed for tight installs in caravan and 4WD plumbing systems

Genuine John Guest single check valve designed for 12mm OD pipe systems to prevent reverse water flow.

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John Guest 12mm Single Check Valve

$34.00
Description

A compact, high-quality one-way valve designed to control water flow in 12mm plumbing systems across caravans, 4WD setups, and off-grid water installations.

This John Guest check valve prevents backflow in your system, ensuring water only travels in one direction. Ideal for caravan plumbing, pump setups, filtration systems, and any application where maintaining clean, controlled flow is critical.

Built for reliability and ease of install, it integrates seamlessly into existing 12mm push-fit systems with no special tools required. A simple but essential component for protecting pumps, filters, and water systems from reverse pressure or contamination.

FEATURES

One-way flow control valve

12mm push-fit connection

Prevents backflow and pressure reversal

Lightweight and corrosion resistant

Compatible with standard John Guest systems

Specifications

Brand: John Guest

Size: 12mm tube OD

Type: Single check (non-return) valve

Application: Water systems only

Installation Information


Push-fit installation into 12mm tubing. Ensure pipe is clean and fully inserted for secure sealing.

PICKUP OR SHIPPING

Available for in-store pickup or Australia-wide shipping

FAQ's

Q: What does a check valve do?
A: It allows water to flow in one direction only, preventing backflow through your system.

Q: Where is it used in caravans or 4WD setups?
A: Commonly installed in water pump systems, filtration lines, and pressurised caravan plumbing.

Q: Is it easy to install?
A: Yes, it’s a simple push-fit connection into standard 12mm tubing.

Guides & Tutorials

A compact, high-quality one-way valve designed to control water flow in 12mm plumbing systems across caravans, 4WD setups, and off-grid water installations.

This John Guest check valve prevents backflow in your system, ensuring water only travels in one direction. Ideal for caravan plumbing, pump setups, filtration systems, and any application where maintaining clean, controlled flow is critical.

Built for reliability and ease of install, it integrates seamlessly into existing 12mm push-fit systems with no special tools required. A simple but essential component for protecting pumps, filters, and water systems from reverse pressure or contamination.

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