fresh-air inlet

fresh-air inlet

A vent connection to a house drain, on the building side of the main drain trap.
References in periodicals archive ?
* Moved the fresh-air inlet to the top of the radiator shroud, eliminating a resonator and baffle
Like a pitot tube or any other fresh-air inlet on the airframe, if enough ice accumulates at the right (wrong) spot, the opening will become obstructed.