Manufacturer Name: RINNAI Product Number: 107000143 OEM Part Number: 107000143 Product Description: Thermal Bypass Valve The Rinnai 107000143 Water Heater Thermal By-Pass Valve from HnKParts is a vital component designed to enhance the efficiency of tankless water heaters. This valve minimizes water waste by redirecting unused hot water back to the heater, ensuring immediate hot... https://www.hnkparts.com/107000143-rennai-thermal-bypass-valve