Homemade Pressure Sandblaster
Sand is poured in the top and falls into the hose below where it is pushed by air from an air compressor. This is used for removing rust, welding slag and other debris from metal that is to be painted. I put a ceramic nozzle at the end of the black hose which also has an on/off valve just before that point. The pressure gauge in the top registers the air pressure in the tank. This blasts sand much better than a suction (or syphon) blaster which sucks sand up from below by blowing over a tube that is in the abrasive. I used the threaded holes that were in this former water tank so it was not difficult to make. My projects have become more "quick and dirty" plus I usually coat them with roofing coating now so I haven't used this for a while.