Super quiet Smooth flow 2.3 GPM Pressure switch provides automatic on/off function Self-priming Run dry Low current draw Extra low profile Easy to install 1/2" (13 mm) and 1/2" threaded hose adaptors included Complies with USCG regulation 183.410 and ISO 8846 MARINE for ignition protection Pumps comply with BSEN 50081-2 and 89/336/EEC electromagnetic compatibility requirements and are marked