3 SUCTION PIPE WITH VORTEX PLATE

Amazon : Anti-Vortex PVC Plate Assembly (3 Inch
Size:3 Inch An anti-vortex plate prevents the formation of a vortex and subsequently air entrapment into the pump by forcing any emerging vortex to go around a plate and then into the suction pipe. The swirling motion cannot be maintained and the vortex dissipates and cannot form if Price: $109[PDF]
NFPA 22 (2013) Anti-Vortex Plate Specifications
as they are adequate for all sizes of pump suction pipes normally used. Smaller plates may be used; however, they should comply with 14.2. Anti-vortex Plate Inspection Requirement From Annex A Page 60 (22-57): 17 Anti-Vortex Plate Inspection.