How to Get Water Out of a Small Air-Compressor

When an air compressor gets hot, the air being compressed also gets hot. When the air cools, moisture condenses and settles in the bottom of the compressor's tank. If a compressor builds up too much condensation, the condensation will start to affect the performance of the tools attached to the compressor. While larger compressors use moisture traps to eliminate condensation, that solution is impractical for most small air compressors.

Things You'll Need

• Pliers

Instructions

1. Turn the compressor's power switch to the "off" position following the manufacturer's instructions. Unplug the compressor. Pull back the ring on the female end of the quick coupler and removing the air hose. Pull the ring on the safety valve, releasing air pressure until the pressure gauge on the tank reads 20-PSI.

2. Locate the petcock at the bottom of the air compressor's tank. Loosen the petcock by turning it counterclockwise with a pair of pliers. Open it the rest of the way by hand. Ensure all the water has drained from the tank.

3. Tighten the petcock on the bottom of the tank by turning it clockwise after all of the water in the tank has drained.

Tips & Warnings

• The air compressor may need to be tipped in such a manner that the petcock opening is pointed directly at the ground to ensure that all of the water drains out of the tank.

• Wear safety glasses while draining the air out of an air compressor.

References

• Porter Cable Instruction Manual, Model CPF23400P Pancake Compressor