Drip Irrigation Gardening 220 Vca Amp Series Inline Valve 1Inchreliability: Eccentric diaphragm for smooth closing, less water hammer Glass-filled polypropylene body for strength (slip by slip model bodies are PVC) Reverse flow normally closed design Double-filtered pilot flow for maximum reliability Balanced-pressure diaphragm for long life Buna-N diaphragm with self-cleaning 90-mesh (200 micron) pilot water filter and stainless steel spring Three-year trade warranty. Versatility: Compact design, 2.54â?? spin radius for tight installations Operates in low-flow and Xerigation�® applications when the RBY filter is installed upstream Available in multiple fitting types External bleed to manually flush system of dirt and debris during installation and system start up Internal bleed for spray-free manual operation Unique, easy-to-turn, pressure-assisted flow control mechanism option available Ease of Service: Captive multi-drive screws for ease of access Your choice of tools to open valve (nut driver, Phillips head screw driver, slotted head screw driver) Four screws for quick access to diaphragm Trouble-free service with few parts Diaphragm locating post for positive installation Operating Range