Best Seller | Orbit 4pk Waterproof Wire Connectors Grease Sprinkler Wiring Cap Fittings 57002 Grease caps are sprinkler system parts that seal and protect low-voltage wire connection between the watering timer and sprinkler valve solenoid. This kit is also great for making sprinkler system repairs to replace worn out grease caps or repair... more | | $8.38 FREE shipping go to store |