b'LT ENGINEERINGCATALOG Below grade installations can be convenient, but installations. Understanding the direction of floware limited to certain types of backflow preventers. (flow-up or flow-down) is important from anCare must be taken to provide accessibility for testingapproval standpoint.and maintenance.ParkUSA Backflow preventer sizes vary by model andHorizontal installations are the most common.configurations. The standard sizes available for each Vertical installations are limited to certain types model can be found in the following table.of backflow preventers. Reduced Pressure Principle Backflow Preventers may not be suitable for vertical BACKFLOW PREVENTOR SIZESMODEL SIZE L1 W1 H1 WEIGHTBP3 3" 6-0" 3-6" 4-0" 2,700 LBSBP4 4" 6-0" 3-6" 4-0" 2,900 LBSBP6 6" 7-10" 4-4" 5-6" 9,000 LBSBP8 8" 7-10" 4-4" 5-6" 15,000 LBSBP10 10" 9-0" 6-0" 6-6" 18,000 LBSBP12 12" 9-0" 6-0" 6-6" 18,000 LBS28 INFO@PARKUSA.COM|888-611-7275|WWW.PARKUSA.COM'