COMPRESSED AIR PIPING SYSTEM
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In-line brass check valve (3/8" female npt x 3/8" female npt)
Air compressor in-line check valve 3/8" X 3/8"
List Price: $18.95
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One new (3/8" female npt x 3/8" female npt) in-line air compressor check valve, with a 1/8" female npt port in the side to go to a un-loader valve if needed. This style of check valve is usually screwed directly in-line between the compressor pump outlet and tank inlet, then the main line coming off the compressor pump is connected to it and the other side would go to the tank. This valve prevents back flow or tank pressure from getting back to the air compressor pump once the compressor is shut off. Also this valve has a 1/8" female npt port in the side which usually goes to a un-loader valve on your pressure switch or air compressor pump, to un-load the pressure off the pump once the compressor shuts off. (Note: If you do not have a unloader this port can be plugged.) For more information click on technical specs.
(Tip:) If your air compressor unloader valve continues to leak when the compressor shuts off the check valve is what needs to be replaced.
Valve inlet threads: 3/8" female npt, which measure about 5/8" inside diameter.
Outlet threads/ tank threads: 3/8" female npt, which measure about 5/8" inside diameter.
Side port: 1/8" female npt, which measures about 10/32" inside diameter.
Total length: 2 13/16*
The inlet side of this valve is stamped with the letters "IN" which stands for inlet. This is very important if you would get this in backwards it could cause harm to your compressor pump or could cause more serious damage*
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