Black plastic straight push-fit connector for campervan or marine electrical and water systems

John Guest 12mm Check Valve

£6.75

Tax included.

Product info

John Guest 12mm Check Valve is a push-fit non-return valve for campervan and motorhome water systems. Designed for 12mm pipe, it prevents backflow and protects pumps and appliances with secure, leak-tight Speedfit installation.

Quantity: Single

Single 10 Pack 100 Pack

Changed your mind? Return your order within 30 days.

The John Guest 12mm Check Valve is a push-fit non-return valve designed to prevent backflow in campervan, motorhome and caravan water systems. Installed in-line within your 12mm pipework, it ensures water flows in one direction only — protecting pumps, heaters and appliances from reverse flow and pressure issues.

Using trusted John Guest Speedfit technology, this valve connects quickly and securely without tools, clamps or sealants. Simply push your 12mm pipe into each end for a reliable, leak-tight installation.

Ideal for fresh water systems, the check valve helps maintain consistent water pressure, prevents back siphoning, and improves overall plumbing reliability in mobile and off-grid environments.

Key Features

12mm push-fit non-return (check) valve
Prevents backflow in water systems
Tool-free Speedfit installation
Suitable for hot and cold potable water
Protects pumps, heaters and appliances
Ideal for campervan, caravan & motorhome plumbing

Typical Uses

Installed after water pumps
Preventing backflow from accumulators
Protecting water heaters
Maintaining one-way flow in fresh water systems

A simple but essential component for building a safe and professional campervan plumbing system.

Delivery & Returns

🚚 Fast Dispatch: Order by 2pm and we’ll aim to ship your order the same day, Monday to Friday.

🇬🇧 UK Delivery: DPD, Parcelforce, or Royal Mail

📦 30-Day Returns: Unused items in original packaging

💬 Need Help? info@nomadicleisure.co.uk

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