The Campbell Hausfeld filter and regulator system (PA212503AV) combines a heavy-duty filter and regulator into one space-saving unit. The system removes dirt and condensed water from compressed air lines, helping to extend air tool life, minimize downtime and increase productivity. The built-in regulator is easy to adjust and helps ensures that air tools receive the correct air pressure for proper operation. 3/8-inch NPT inlet/outlet port. Finish your projects faster and easier with Campbell Hausfeld. The Air Power Expert ®