Pedrollo CKR Self-Priming Liquid Ring Pump INSTALLATION & USE Designed for pumping diesel/naphtha and clean water free from abrasive particles and non-corrosive liquids that do not harm the pump's components.Their specific operating mechanism makes them an excellent solution when a compact self-priming pump is required or when the flow of the liquid is irregular or mixed with air.We always recommend getting pumps installed by a qualified plumber.The pump should be installed in an enclosed environment or sheltered from inclement weather. CONSTRUCTION Pump Body: Cast iron, with stainless-steel front shaving surface to prevent the impeller from locking due to oxidation. The pump body is equipped with ISO 228/1 threaded portsMotor Bracket: Aluminium with brass cover with front anti-locking shim function (patented)Impeller: Bronze, star-type with open radial vanesMotor Shaft: Stainless steel AISI 431 Power Supply: CKRm: single-phase 230 V - 50 Hz with winding integrated thermal motor