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. The 4-diaphragm system prevents the pulsations that usually occur in the other fresh water pumps with a semi-open tap. 4 plug-in fittings (2 x 1/2" threads and 2 x 14-mm with 1/2" hose adaptors) and a plug-in inlet strainer.