Rainbird DVF Series Electric Valve Slip and X Slip Joint, 1"/24 VAC 1 in. (26/34) Slip-by-Slip (SS) configuration for low cost, solvent-weld installations Unique, easy-to-turn patented pressure assisted flow control mechanism Double-filtered pilot-flow design for maximum reliability Balanced-pressure diaphragm for long life External bleed to manually flush system of dirt and debris during installation and system start-up