Non-return 38 mm 90° check valve | 4BoatsCompact 90 check valve for bilge and discharge lines, designed to prevent backflow and direct discharge away from the hull. 38 mm (1 in) outlet: fits standard 1 in marine hose 90 angle: directs discharge away from the hull Non return action prevents backflow into the system Inline orientation for compact mounting Accessible position reduces servicing time Confirm hose internal diameter and clamp type before installation