4 poles electrical motor (1450 RPM) with thermal protection. Three ceramic coated pistons, brass linear pump head with built-in by-pass valve. Low voltage and delayed Total Stop. Suction and delivery valves s/s. Vertical burner with high thermal efﬁciency steel coil. Temperature regulation gauge withsensitive stainless steel coil. Low fuel light lamp bulb and cut off. Safety valve. Built-in detergent tank for indirect suction. Auxiliary motor for burner. Hose-reel (optional).