The Triangle Tube PEVLV02 3-Way Valve Cartridge is a replacement valve component designed for compatible Triangle Tube boiler systems. It regulates and directs water flow between heating and domestic hot water circuits, allowing the boiler to switch between operating functions as required. Commonly used in high-efficiency boilers and hydronic heating systems, the cartridge supports pr... https://www.partshnc.com/pevlv02-triangle-tube-3-way-valve-cartridge