Pipe Size Bowl Cap. They also prevent abrasive damage.
Water is drained off through a petcock.
Pipe Size Bowl Cap. Eliminates filter overflow. This simple, accurate pressure reduction device provides stable air pressures within recommended range for maximum operating efficiency. Ideal for controllling the speed and powerofair equipment. Oil lubricates all precision working parts of air operated equipment, eliminating wear and alowing them to produce at peak efficiency with a minimum of unscheduled downtime.