I used schedule 40, readily available at all hardware stores. However, I'm changing to copper. I think the strength on both is more than adequate. The copper should cool the air from the compressor quicker and make the water traps more effective. I just bought a blast cabinet and have noticed a lot more water in my system than ever before despite good filters and traps.
Larry
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Larry
72 Chevy SWB 4x4
71 Chevy SWB 4x4
My Work Truck
"Don't confuse enthusiasm with capability"
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