10Pcs/set Strong Exhaust Gas Water Heater Spare Parts LPG Changed To NG Gas Source Interchangeable M5 M8 Nozzle Thread Type: M5 , M8 Aperture size: zero , 1 , 1 Installation method: exterior thread con Replacement steps: disassemble the fuel appliance, discover the nozzle, investigate the nozzle constitution size, as long since the size is the same, the nozzle would be replaced. Note: The substitute exercise calls for auxiliary use of sealant. After installation, verify the air tightness and use it without air leakage. Please hear in on examine whether it's a strong exaust or a continuing temperature model. Scope of application: water heater/wall-hung boiler The same nozzle length can be utilized universally.