Invention Grant
US08850628B2 Pressure relief device 有权
减压装置

Pressure relief device
Abstract:
A pressure release device for preventing pressure build-up in a sink, shower or tub drain includes an elongated tubular member having an elongated passageway extending therethrough. A partially closed top with a plurality of openings therein and an open bottom and means for disposing the device in a drain with an upper portion of the device extending upwardly by at least about 1 cm above an opening to the drain and a bottom of the device extends downwardly in the drain at least 1 and preferably about 2 cm below the opening of the drain.
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