Genuine Campbell Hausfeld replacement part, this item is sold individually.
When you use a compressor the air that is compressed inside the tank will condensate and leave water inside the tank.
If it is left in the tank too long it can start to rust out the inside of the tank.

The Drain Valve should be opened up and let the water drain out.
The water will build up if you have a tendency to leave air in your tank for a long period of time.
You should drain your tank after each time it is used to prevent this from happening.

This is a genuine OEM sourced replacement part designed for use with air compressors. This breather acts as a valve for the fuel tank, it allows for the air to enter the fuel tank but it won't allow fuel or fuel emissions to leave the tank. It is made out of plastic and it is sold individually.

No special tools are needed to replace this Breather Assembly, simply screw it in the opening on the crankcase.

Genuine Campbell Hausfeld replacement part, this item is sold individually.
The ST033001AV Compression Nut is used to attach the copper tubing to certain components of the compressors listed below.
Along with the Compression Nut you will need to use a compression sleeve ( or Ferrule) to seal the tube from leaking air.
The Compression Nut will go on the tubing first then the Ferrule will slide into the nut.

Genuine Campbell Hausfeld replacement part, this item is sold individually.
The Ferrule in this case is used on all of the compressors listed below.
It is placed inside a Compression Nut of which is on a copper or aluminum tube and then attached to a component of the compressor.
It aids in stopping air leaks.

Genuine Manufacturer Approved replacement part designed for use with some Campbell Hausfeld Pressure Washers. This part is made out of Plastic and it is Sold Individually. This Adapter connects to the Pump allowing to for the water flow.

This is an Original Manufacturer Approved replacement part used on Portable Air Compressors. The piston is a central component of an engine. It both provides compression within the engine, as well as transfers the energy from combustion to the crankshaft (which creates rotation).

This Assembly includes the Piston/Piston Rod, Cylinder and a Screw. Please note manufacturer does not include the main bearing with this replacement Piston Assembly. A good quality high speed bearing marked 6203 will work. The 6203 Bearing is Part #MJ108004AV.

Replacing the piston assembly is not the simplest repair, but it is definitely something you can do yourself. You will need a Flathead or Phillips Head Screwdriver to remove the cover and a set of Sockets and Wrenches for the rest of the repair.