Browse top-quality options in steam air vents and vacuum breakers at F.W. Webb. Use a steam vent to help improve the efficiency of a radiator, boiler, water heater, or furnace by rapidly venting air. A vacuum breaker is an essential component of a steam system; this small part allows air to enter the unit to break the unwanted vacuum inside. Constructed in steel or brass, these air vents can withstand the daily operation of an existing system. Use our convenient filters to narrow steam vacuum breakers, valves, and vents by size, end connection, and port type. Explore durable steam air vents and vacuum breakers from trusted makers Hoffman and Barnes & Jones to find the right fit for your industrial needs.