The B&K (part number 102-130) tankless water heater isolation valve kit is designed for installing and maintaining tankless water heating systems. This kit typically includes color-coded hot and cold water valves and a pressure relief valve, facilitating easy isolation of the water heater for service. Constructed from lead-free brass, it ensures compliance with drinking water standards. The valves feature PEX F1807 connections, making them suitable for use with PEX piping systems. They are rated for a maximum pressure of up to 600 PSI (non-shock) for the isolation valves and 155 PSI for the pressure relief valve, with an operating temperature range of 32°F to 180°F. The kit is certified to ASTM F1807 and complies with NSF 372 and NSF/ANSI 61 lead-free guidelines, as well as cUPC, IAPMO, ANSI Z21.22, and CSA 4.4 standards. Quarter-turn functionality allows for efficient on/off operation, and large drain ports simplify system maintenanc