Non-Return Valves - Datasheet

Download the product specification sheet for the Metex Non-Return Valves below.

Metex Non-Return Valve Datasheet

The Metex Non-Return Valve Datasheet provides key product details, specifications and installation guidance for the Metex NRV range of non-return drainage valves. Designed to prevent backflow and flooding, these valves offer a reliable and cost-effective solution for protecting below-ground drainage systems.

Product Overview

Metex Non-Return Valves (NRVs) are simple yet effective backflow prevention devices designed to automatically close when water flows in the reverse direction. Manufactured from durable, chemical-resistant materials, they are suitable for use in both new installations and retrofit drainage systems.

Available in 110mm (4″) and 150mm (6″) sizes, the valves are designed to fit standard underground drainage pipes and are ideal for domestic and commercial applications where protection from backflow or floodwater is essential.

Key Features

Prevents backflow and flooding in drainage systems
Compatible with standard 110mm and 150mm pipework
Durable construction with corrosion- and chemical-resistant materials
Easy to install and maintain
Automatically closes under backflow pressure
Suitable for both new and retrofit systems

Applications

The Metex Non-Return Valve is suitable for use in a wide range of environments, including:

Domestic and commercial drainage systems
Below-ground or sewer connections
Flood prevention systems
Retrofit installations for backflow protection

These valves provide peace of mind in flood-prone areas or where water flow reversal could cause property damage, contamination or drainage blockages.

Installation Guidance

Select the correct valve size (110mm or 150mm) for your drainage pipe.
Insert the valve into the pipe run with the arrow marking indicating the direction of normal flow.
Ensure the valve sits securely within the joint, with seals properly positioned to prevent leakage.
Once installed, test flow direction to confirm correct operation.
Check the valve periodically for debris or obstructions to maintain optimal performance.