It can run dry without damage, no vibrations, very quiet. Fitted with internal bypass for inlet pressure control. Permanent magnet motor with self-lubricating shaft. Circuit breaker against unwanted overheating. 4 plug-in fittings (2 x 1/2″ threads + 1 x 14-mm straight hose adaptor + 1 x 14-mm 90° hose adaptor) and plug-in inlet strainer,