The McAlpine ARB1 Anti Cross-Flow and Rodent Barrier Valve is a must-have for any home or business plumbing system. This high-quality trap is designed to prevent cross-flow and rodent infestation, ensuring that your plumbing system remains clean and efficient. With a unit quantity of 17, this trap is perfect for large households or businesses. The McAlpine brand is known for its durability and reliability, and this trap is no exception. Made in the United Kingdom, this trap is built to last and will provide you with long-lasting peace of mind. Whether you're a homeowner, landlord, or business owner, the McAlpine ARB1 Anti Cross-Flow and Rodent Barrier Valve is an essential addition to your plumbing system. NO RETURNS OR REFUNDS.