ARG-2 Strainer Service KitARG Series raw water strainer service kit. Compatible with the Groco ARG 1000, 1210 and 1250 series strainers.In the Box:. (1) - 2-157 - Sight Glass O-Ring. (1) - 2-232 - Cap O-Ring. (1) - 2-229 - 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