Air Compressor Leaking Air From Drain Valve

If air leaks out the unloader when the pump stops replace the check valve because the check valve leaks air back towards the unloader.

Air compressor leaking air from drain valve.

The check valve prevents tank air from back flowing to the pump and unloader. Besides the drain valve is relatively easy and inexpensive to fix. Unplug the compressor drain all the air from the tank remove and clean or replace the tank check valve. If you find that your compressor pressure switch unloader valve is leaking air continuously then you have located at least one of the leaks on your air compressor.

Well if air continuously leaks out of the unloader valve then the compressor tank is emptying and the compressor needs to restart to replenish the air in the tank to get back up to cut out pressure so it can stop on its own. If air continues to leak out of this vent after the compressor stops then it s coming from your tank and that means that the check valve that is supposed to keep air in the tank when the compressor stops is leaking. This video goes over a few main reasons why your air compressor pressure switch or unloader is leaking while the compressor is running or when it shuts off. The valve does not unscrew out so do i have to take apart the bottom of the compressor to get inside to replace the valve.

No more getting on your hands and knees to fiddle with that old hard to get at drain valve. By the way c clip ring shown in the picture prevents the screw from being removed from the drain valve assembly. To fix the air leak caused by a faulty drain valve there are three choices. Often when air bleeds out from a compressor when it s stopped it s because the check valve that is supposed to keep air.

Then mount a ball valve on the end of the nipple. To make draining the compressor easier in the future replace the cheap oem drain with a street elbow and a length of pipe nipple long enough to almost reach front of the tank. The drain valve on the bottom of my craftsman air compressor 919 16737 is leaking air even when closed very tightly with a wrench. But then before you get to use any air it s all leaked out again and the compressor restarts to fill the tank again.

With the compressor off the unloader valve should not be leaking any air at all after the unloading process a second or two has completed. I know a replacement valve is cheap but is it easy to replace.