Package List 1 x check valve Features -Duct Fit: This heater ducting connector is compatible with most ducting sizes, supporting flexible application as a hot water heater gas connector or replacement part -No Backdraft: The Water Heater Backdraft Damper with builtin Nonreturn Valve For Heater is engineered to stop reverse flow, providing reliable protection for your system Gas Water Heater Ventilation System Connector -Product Info: Check valve antifreeze cap -Rainproof Advantage: The Water Heater Vent Windproof Cover provides a watertight seal, safeguarding your exhaust pipe from rainwater, which is crucial for homes in rainy climates Exhaust Pipe Vent Cap -Simple Setup: With its user friendly design, the exhaust pipe tube connector allows for simple installation, letting you quickly enhance your gas water heater ventilation system Water Heater Anti-wind Cover -Size:12.70X8.00X8.00cm/5.00X3.15X3.15in -Material:Stainless steel -Color:Silver -Windproof Design: Fitted with a Windproof Hood for Gas Water Heater, this product blocks strong winds and maintains exhaust efficiency in exposed installations Water Heater Exhaust Wind Guard Goods Description gas water heater accessories Safeguard your heating system with this Water Heater Vent Wind Guard featuring an advanced Anti-backdraft Check Valve.heating pipe accessories Designed as a gas hot water heater accessory, the exhaust pipe tube connector maximizes performance, resists condensation, and acts as a duct backflow preventer, extending the lifespan of your equipment