Dry pipe fire extinguishing sprinkler system

摘要

A dry pipe fire extinguishing sprinkler apparatus including an adapter which is charged with fluid under pressure and connects an adjustable drop nipple or branch pipe having a sprinkler to a header or supply pipe. The adapter includes a valve member which excludes water from the drop nipple and sprinkler until the fluid under pressure is discharged after which such valve member opens to discharge water through the sprinkler.