W4 Non-Return Check Valve 12mm (31273)

W4 Non-Return Check Valve 12mm - Caravan & Motorhome Water System

Protect your caravan or motorhome water pump from backpressure and prevent siphoning of clean water lines with the W4 12mm non-return check valve. This inline valve allows water to flow in one direction only, stopping it from draining back through the pump or contaminating other supply lines when the pump shuts off.

Key Features

• 12mm fitting — the most common internal plumbing size for caravans and motorhomes
• One-way flow valve — prevents backflow through the water system
• Inline installation — fits directly into the 12mm water supply pipework
• Protects the pump from backpressure and reduces pump cycling
• Prevents cross-contamination between mains and tank water supplies
• W4 brand — part number 31273

Where to Fit a Non-Return Valve

Common installation points include the pump outlet, the mains water inlet, and at the junction between the mains and tank supply. Always fit with the flow arrow pointing in the intended direction of water travel. Combining one on both the mains inlet and pump outlet gives the most complete system protection.

Installation

Cut the water supply pipe and fit the valve inline, ensuring the arrow on the body points in the flow direction. Use with standard 12mm push-fit or barbed fittings.

Part number: 31273  |  Barcode: 5019328312738