3/4 inch in size, this plumbing isolation valve kit is made from lead-free brass for durability and safety. It includes two unions, two ball valves, two drain valves, and a pressure relief valve, providing comprehensive functionality for isolating a tankless water heater from the plumbing system. This setup allows for quick access during maintenance, service, and testing, ensuring efficient operation. Backed by a 1-year warranty, it offers peace of mind for residential use.