The Silen S 150 22M from Espa comes as a quiet-running single-stage, self-priming pump complete with pre-filter for the recirculation and filtering of water in small to medium swimming pools. 18000 l/h Pump body, pump foot, impeller, seal mounting and diffuser in technopolymer. Motor shaft in stainless steel AISI 431.Special mechanical seal in AISI 316. Motor housing in aluminium. O-rings in NBR. Bearings up to 160° C Asynchronous, two poles. IP 55 protection. Class F insulation.Continuous operation.Single-phase version with built-in thermal protection.10.000 hours P2 capacitor with aluminium casing. Supplied with:Suction unions - 2" / 1½" Discharge unions: 1½"