Backflow Preventers & Backflow Prevention UK

Backflow Preventers for UK Commercial, Residential & Irrigation Systems

Shop backflow preventers and backflow prevention equipment in the UK from leading manufacturers including Zurn Wilkins, Watts and Apollo. MasterBuilder Mercantile supplies reduced pressure (RP / RPZ) assemblies, double check valve assemblies, dual check valves, vacuum breakers, testing equipment and backflow repair parts for commercial plumbing, mechanical, irrigation, residential and industrial applications.

Backflow prevention requirements vary according to the application, degree of risk, system design and applicable local requirements. When selecting an assembly, consider the type of backflow protection required together with connection size, operating pressure, flow requirements, installation configuration and any approvals required for the specific application.

Reduced Pressure & RPZ Backflow Preventers

Reduced pressure principle assemblies provide protection against both backsiphonage and backpressure and are commonly specified where a higher level of cross-connection protection is required. Browse our RPZ and reduced pressure backflow preventers for available sizes and configurations from leading commercial plumbing manufacturers.

Zurn Wilkins Backflow Preventers

Our range of Zurn Wilkins backflow preventers includes reduced pressure and double check assemblies for a variety of plumbing, mechanical and irrigation applications. Zurn Wilkins products are available in multiple connection sizes and configurations to suit different system requirements.

A popular model within the range is the Zurn Wilkins 1-975XL 1" RPZ backflow preventer, a compact bronze reduced pressure assembly featuring 1" female NPT connections, full-port ball valves and in-line service access.

What Is a Backflow Preventer?

A backflow preventer is a plumbing safety device designed to stop contaminated or non-potable water from reversing direction and entering a potable water supply. Backflow can result from backsiphonage or backpressure when pressure conditions within a plumbing system change.

Different backflow prevention devices provide different types and levels of protection. The appropriate assembly depends on the application, degree of risk, system configuration and the requirements applicable to the installation.

Types of Backflow Prevention Equipment

• Reduced Pressure Principle Assemblies (RP / RPZ): Designed to protect against both backsiphonage and backpressure in applications requiring a high level of backflow protection.
• Double Check Valve Assemblies: Two-check assemblies used to protect against backsiphonage and backpressure where this type of protection is appropriate for the application.
• Pressure Vacuum Breakers (PVB): Backflow prevention devices commonly used to protect against backsiphonage in irrigation and other suitable applications.
• Atmospheric Vacuum Breakers (AVB): Devices designed to provide backsiphonage protection in specific plumbing and water-system configurations.
• Dual Check Valves: Compact devices providing two stages of check-valve protection for suitable plumbing applications.

Double Check Backflow Preventers

For applications requiring a double check assembly, explore our double check valve assemblies. Available models include commercial backflow preventers in a range of sizes and connection configurations from established manufacturers.

Backflow Testing, Parts & Maintenance

MasterBuilder Mercantile also supplies equipment and replacement components for servicing backflow prevention assemblies. Browse backflow test kits for testing equipment, or shop backflow preventer parts and repair kits for maintenance and repair components.

Choosing a Backflow Preventer in the UK

When choosing a backflow preventer for a UK installation, consider the required protection method, connection size, flow rate, operating pressure, temperature, installation orientation and product approvals. Requirements can vary according to the application and location, so applicable UK water regulations, local requirements and any required product approvals should be confirmed before specifying or installing an assembly.

MasterBuilder Mercantile supplies backflow prevention equipment to customers throughout the United Kingdom, with products displayed in GBP through our UK online store. Explore our range of Zurn Wilkins, Watts, Apollo and other commercial backflow prevention products for plumbing, mechanical, irrigation and industrial applications.