Dust Collection Blast Gate for 6-inch Sewer & Drain Pipe

Like a lot of woodworkers, I'm using PVC plumbing pipe in a central dust collection system in my shop. One drawback for this type of pipe is that the fittings are not designed for upwards of 1000 CFM air flow, and will introduce significant pressure drop to the system. Additionally, once you get up into 6 inch and bigger sizes, the fittings get expensive.

These factors led to designing and printing my own fittings for the DC system. Blast gates, elbows, and wyes. I tried to design these to mi