Patented Isolator E-X-P Service Valve Kits allow for quicker, consistent quality tankless water heater installations with fewer leak paths. Now available with Pro-Connect Push ends for fully removable connections to copper, CPVC or PEX. Clean, flush, or diagnose any tankless water heater with ease. Products are in stock for immediate shipment. Lead-free CleanBrass certified to meet all low lead laws and guaranteed for life.