A BACKFLOW PREVENTER, A HOSE COUPLING OF A HYDRANT AND A HYDRANT

摘要

A backflow preventer adapted for installation in an inner conduit of a hose coupling of a hydrant is disclosed. The backflow preventer contains a non-return device having a closing body, a seal seat, and a resetting device. The resetting device is adapted to resiliently pretension the closing body into sealing engagement against the seal seat.