We recommend using 70psi air pressure with this Oil Dispensing Pump Station The Sealey AK4560D is designed for barrels or tanks with 2\" BSP fittings and is suitable for use with an engine, hydraulic, synthetic, gear and transmission oils up to SAE150. Comes supplied with an air management system and is connected to a 940mm rigid suction probe with a non-return valve. Features: Air operated 3:1 double acting pump for barrels or tanks with 2\"BSP fittings The pump is supplied with an air management system and connected to a 940mm rigid suction probe with a non-return valve Features hose for attachment to digital oil meter (Model No. AK4565D supplied) or to optional retractable hose reel (Model No. AK4567D) Suitable for use with an engine, hydraulic, synthetic, gear and transmission oils up to SAE150 Specification: Maximum Air Pressure: 115psi Maximum Flow Rate: 12L/min Maximum Output Pressure: 350psi Maximum Viscosity: SAE150 Nett Weight: 10.49kg Outlet Size: 1/2\" BSP Pump Ratio: 3:1 Recommended Air Pressure: 70psi