Hayward Low Velocity Low Velocity Suction Outlet Manual - Page 3

RECOMMENDED SYSTEM SPECIFICATIONS: ACCEPTABLE PIPE SIZE FOR MAXIMUM RECOMMENDED SYSTEM FLOW RATE PER APSP-7 (6 FT/SEC IN THE BRANCH LINE) Pipe Size Flow rate Pipe Size Flow rate [mm] GPM [Liter/Min] [mm] GPM [Liter/Min] 2 ½" 90 4" 238 [75] [340] [100] [900] 3" 138 6" 540 [90] [522] [90] [2040] CHART 1 WG1031BLV Suction Outlet Cover (Replacement sold as a WGX1031BLV) is rated for 108 GPM Wall Mounted or 190 GPM Floor Mounted for single or multiple suction outlet use. (9" x 9") WG1032BLV Suction Outlet Cover (Replacement sold as a WGX1032BLV) is rated for 260 GPM Wall Mounted or 392 GPM Floor Mounted for single or multiple suction outlet use. (12" x 12") WG1033BLV Suction Outlet Cover (Replacement sold as a WGX1033BLV) is rated for 520 GPM Wall Mounted or 520 GPM Floor Mounted for single or multiple suction outlet use (This is a package of four 9" x 9" covers and frames) (18" x 18") In the event of one suction outlet being blocked, the remaining suction outlets serving that system shall have a flow rating capable of the full flow of the pump(s) for the specific suction system. Example: In the System shown in Diagram 1, two (2) 12" x 12" suction outlet covers are selected and mounted on the floor. These covers are individually rated for 392 GPM. For a desired flow rate through the pump of 120 GPM, a minimum pipe size from the Chart 1 is selected at 3". At the desired flow of 120 GPM one cover could be partially blocked and the other suction outlet flow would be below the rated 392 GPM of the "Floor" mounted suction outlet cover. Since there are two outlets flowing in normal operation, and the allowable velocity in the interconnecting piping is only 3ft/sec, the same pipe size is required in the interconnecting piping. Example: In the System shown in Diagram 2, one (1) 12" x 12" suction outlet cover mounted in the floor, rated at 392 GPM, and one (1) 12" x 12" suction outlet cover mounted on the wall, rated at 260 GPM. For a desired flow rate through the pump of 200 GPM, a minimum pipe size from the Chart 1 is selected at 4". At the desired flow of 200 GPM either cover could be totally blocked and the other suction outlet flow would be below the rated 260 GPM of the wall mounted suction outlet cover. Note: Flow may be limited by entrapping force in dual suction systems. Page 3 of 8 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS DUAL SUCTION OUTLET SET ISSQUARELV REV B