I make a simple aircrete foam generator powered by my shop vac. Based on a viewer's comment, I used nylon window screen for the foam diffusion. I took the prototype through a few iterations to get the airflow and pressure correct. One more iteration to come using stainless steel wool for diffusion.

Plans Available At: https://greenshortzdiy.com/store/
(Plans not available for Vac-n-Foam yet)

Parts List:
2-foot piece of 2″ PVC pipe
2″ PVC coupling
2″ PVC 90-degree elbow
2″ to 1″ PVC adaptor
1.5″ PVC 45-degree elbow
1.5″ to 1″ PVC adaptor
14 inches of 1″ PVC pipe
1″ PVC 90-degree elbow
1″ PVC end cap
2″ to 3/4″ PVC adaptor
2″ piece of 3/4″ PVC pipe
Nylon window screen (4 x 4 feet)

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