GROCO ARG-1 Strainer Service Kit [ARG-1]ARG 1 Strainer Service Kit ARG Series raw water strainer service kit. Compatible with the Groco ARG 500, 750 and 755 series strainers. In the Box: (1) 2 153 Sight Glass O Ring (1) 2 135 Cap O Ring (1) 2 228 Cap O Ring (4) PFW 2 Set Sight Glass Bolt Washer (1) 2 011 Drain Plug O ring Before 08 01 01 (1) 2 111 Drain Plug O ring After 08 01 01 *Sold as an Individual Specifications: Type: Service Kits Owner's Manual (pdf)