(Based on Polyethylene Buckets)

Vent Pattern 1

Same hole diamter, centers, and number of holes in body as mounting holes in back.

Vent Pattern 2

One row of 9/32" or 11/32" holes in body on 1-1/8" centers.

Vent Pattern 3

Two rows of 9/32" or 11/32" holes in body on 1-1/8" centers.

Vent Pattern 4

Two rows of 9/32" or 11/32" hoes in body on 1-1/8" centers, three holes each end.