| 摘要 |
A universal check valve assembly is disclosed which fits within an exhaust conduit having any one of a range of diameters and without any modification to the structure of the conduit. The assembly includes an adjustable diameter support hoop and a circular, single piece valve structure of variable diameter which can removably engage the support hoop. The support hoop has a downwardly extending, outwardly flaring skirt portion which resiliently engages the inner wall of an exhaust conduit.
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