McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve

McAlpine ARB-1 Anti Cross-Flow & Rodent Barrier Valve – 110mm WC Rat Blocker

Our McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve is a practical solution for helping prevent rats and other rodents from entering a property through the WC drainage system. It also helps prevent unwanted cross-flow between toilets on back-to-back WC installations.

Designed to fit any McAlpine WC connector with a standard 4″ / 110mm rubber outlet seal, the ARB-1 can be easily incorporated into suitable domestic and commercial drainage installations.

Unlike a basic plastic flap, the barrier door is reinforced with stainless steel mesh. This provides additional protection against rats attempting to bite or gnaw through the valve, creating a more effective physical barrier between the drainage system and the WC.

The valve body is manufactured from black polypropylene, which helps prevent light penetration into the drainage pipe. Its versatile design also means it can be installed in either a horizontal or vertical position, depending on the drainage arrangement.

Help Stop Rats Entering Through Your Toilet

Rats are capable of travelling through drainage and sewer systems and can potentially find their way towards WC connections. Installing a suitable toilet rat blocker provides an additional physical barrier within the drainage system.

Our McAlpine ARB-1 combines rodent protection with an anti cross-flow design, making it particularly useful where two WC pans are installed back-to-back or connected to a shared drainage arrangement.

Key Features of the McAlpine ARB-1

• Fits McAlpine WC connectors with a 4″ / 110mm rubber outlet seal
• Helps prevent rats and rodents entering through WC drainage
• Designed to prevent cross-flow on back-to-back WC installations
• Stainless steel mesh-backed plastic barrier door
• Mesh reinforcement helps prevent rats biting through the barrier
• Manufactured from durable black polypropylene
• Black construction helps prevent light penetration
• Suitable for horizontal or vertical installation
• Suitable for domestic and commercial drainage systems
• Simple, compact design

110mm WC Rodent Barrier for Domestic & Commercial Properties

Our McAlpine ARB-1 is suitable for a wide range of properties where additional protection against rodents entering through the drainage system is required.

Typical applications include:

• Houses and residential properties
• Flats and apartment buildings
• Back-to-back WC installations
• Commercial washrooms
• Restaurants, pubs and hospitality premises
• Offices and public buildings
• Properties experiencing recurring rat problems
• Refurbishment and drainage improvement projects

McAlpine ARB-1 Specifications

• Product: Anti Cross-Flow & Rodent Barrier Valve
• Model: McAlpine ARB-1
• Outlet Size: 4″ / 110mm
• Body Material: Black polypropylene
• Barrier: Plastic door reinforced with stainless steel mesh
• Installation Position: Horizontal or vertical
• Compatibility: McAlpine WC connectors with a 4″ / 110mm rubber outlet seal
• Application: Prevention of WC cross-flow and rodent entry

Why Choose a McAlpine ARB-1 WC Rat Blocker?

Rodents entering buildings through drainage systems can be difficult to deal with once they gain access. Installing a physical barrier at the WC connection can help reduce this potential entry route without interfering with the normal operation of the toilet.

The ARB-1 has been specifically designed for use with McAlpine WC connectors, providing a straightforward solution for installers, plumbers, property managers and homeowners looking for additional protection against both cross-flow and rodents.

Its stainless steel mesh-reinforced door is an important feature, providing additional resistance against rats attempting to gnaw through the barrier.

What’s in the Box?

• 1 × McAlpine ARB-1 Anti Cross-Flow & Rodent Barrier Valve