ORBIT® IRRIGATION 3/4″ FNPT ANTI-SIPHON SPRINKLER VALVE WITH FLOW CONTROL UNIVERSAL – WORKS WITH RESIDENTIAL STANDARD 24 VOLT SPRINKLER SYSTEMS FLOW CONTROL – ADJUSTS AMOUNT OF FLOW TO SPRINKLERS MANUAL ON/OFF BYPASS LEVER – IDEAL FOR TESTING AND FLUSHING SPRINKLER LINES ANTI-SIPHON – PREVENTS CONTAMINANTS FROM ENTERING THE WATER SUPPLY LISTED BY INTERNATIONAL ASSOCIATION OF PLUMBING MECHANICALS OFFICE