Air Receivers, AR-4000 Vertical and Horizontal Air Receivers 3 AR-4000 Built in accordance with ASME section VIII, DIV. 1 Latest Edition. Specifications Capacity 4000 gal Diameter varies Overall Height varies Pressure Rating 132 psi150 psi Inlet Size 6 in Outlet Size 6 in Misc. Couplings 3/4″ – 2″ Drawing Quote Form Request information