PVC duct will not withstand any pressure (PSI); therefore, there are no pressure ratings for ductwork like there are for SCH40 and SCH80 PVC pipe. There is a collapse pressure measured in the water gauge. As a general rule, the duct will withstand up to -10" WG static pressure until you reach the larger sizes (18" – 24"). Then it decreases to around -8" WG static pressure.
Title: Is PVC duct rated for pressure?
Description: Static pressure ratings for PVC Duct
Published: 12/13/2007
Last Edited: 12/29/2022
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