4? / 110mm Anti Back-Flow and Rodent Barrier Valve. Designed for use in both commercial and domestic drainage systems, this valve helps prevent backflow and deter rodent entry via WC connections. Material: Made from black polypropylene to prevent light penetration, which discourages rodent activity within the pipe. Rodent Protection: Features a durable plastic door reinforced with stainless steel mesh, making it resistant to gnawing and effective at blocking rodent access into buildings through the WC. Compatibility: Suitable for use with any McAlpine rigid or flexible WC connector that includes a 4? / 110mm rubber outlet seal. Regulatory Compliance: Ideal for installations requiring additional rodent control, as recommended by Approved Document H1 of the Building Regulations 2000 (2002 Edition). Backflow Prevention: When installed in systems that comply with current building regulations and BS EN 12056-2:2000, the valve effectively prevents wastewater backflow. Installation Flexibility: Can be installed in either horizontal or vertical orientations for ease of use in various plumbing configurations.
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