Your sprinkler system represents an important investment. Whenever water comes in contact with metal and electricity, there is potential for corrosion. The risk is highest on DC Voltage systems, like some 2-wire irrigation controllers, but it can still be a risk for standard 24 VAC irrigation and landscape controllers. Easy Seal waterproof wire connectors and direct burial grease tubes (also known as grease caps) are a smart way to protect your investment. Easy Seal waterproof wire connectors are ideal for 24 VAC solenoids in valve boxes, while grease tubes are ideal for 2-wire and direct burial applications.