Irritrol® 2500DK-1-MF 1" Drip Zone 2500 Series Valve Kit Medium Flow - Not all drip zone kits are created equal, and with Irritrol® drip zone kits, you'll know why. Featuring the industry's most recognized valves that have long been a standard for more than half a century, this all-inclusive kit comes complete with all the necessary components you need for a drip zone. This kit includes a 1" 2500 series valve, Y-filter, medium-flow regulator and fittings.