Features: This high efficiency leak proof repair set is specifically engineered for Febco 0.5" and 3/4" pressure vacuum relief (PVB), utilizing advanced check valves technology to effectively prevent water backflow and protect plumbing systems against contamination and damage. Featuring a comprehensive set of erosion resistant metal alloy components, the set ensures 99% fault repair capability under pressures up to 150 , with precise engineering for easy installation and long lasting durability to minimize maintenance needs. Ideal for plumbers and enthusiasts, it empowers users to perform quick, stable repairs on water systems, enhancing productivity and reducing downtime in various maintenance tasks. Designed for versatile applications in residential homes, commercial buildings, and agricultural irrigation setups, it maintains stable water pressure and prevents backflow contamination across diverse environments like gardens and farms. Constructed with high standard and galvanized metal materials, it undergoes rigorous testing for superior weather resistance and leak proof performances, ensuring consistent reliability and outperforming lower quality alternatives in real world use. Specifications: Type: Check valves Repair Replacement set Part number: 905-051 component : metal Package Includes: 1 set x Check valves Repair Replacement note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.