Waterway Plastics is proud to design, engineer and produce our quality line of products right here in the USA, using only premium NSF Approved materials & meeting all Certifications and Standards, at our 460,000 sq. ft. facility in Oxnard, CA. Waterway. Committed to innovation & excellence since 1973. Top access air Control.; Hole size 1-5/8 in.; Style - Scalloped This product ships in approximately 1 days