🔒 Secure Your Flow with Confidence! Crafted with stainless steel springs and low-lead bronze. ASSE Listed 1024 and CSA Certified for peace of mind. Meets NSF/ANSI 61 standards for safe use. Install horizontally or vertically to save time. Multiple configurations for quick setup. ASSE Listed 1024 1" Inlet/Outlet Corrosion-Resistant The Zurn Wilkins 1UFX1F-700XL Dual Check Valve is engineered for efficiency and durability, featuring a 1" female union inlet and outlet. Its versatile installation options and corrosion-resistant materials make it a reliable choice for any plumbing system.