Thread: Home made sandblaster

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no pics but I'll try to describe it. I used a 4" pipe union on the top with a pipe cap. I drilled and tapped for 1/2" pipe inlet in the side of this for my air feed on top. I have a ball valve and a pressure regulator on this feed to control pressure and flow on top. A T fitting and a 1/2" hose going to the bottom which has a ball valve to meter the sand and a T fitting leading to the gun I ordered from Northern Tool. I'm using about 10 ft. of hose between the tank and gun. I tried the pressure reg. before the T fitting on top and after with lousy results both ways. thanks for any help you can give. I don't have any check valves or relief valve on it. I modeled it after the plans on http://www.inertia.org/acvwjyro/gifs/sandblst.gif accept that I added a valve on top and bottom and pressure reg.