Stainless steel pump unit. Self-priming pump.EPC (Electronic Pressure Control) system: automatic pump shutdown when the water reserve is depleted (protecting the pump itself from harmful dry running),Constant monitoring of operation through indicator lights: green light "Line" = pump in operation; red light = "Failure": pump not in operation due to an anomaly (e.g., water depletion).Constant water pressure during delivery. Reduced dimensions compared to traditional pressure tanks with a reservoir.