Irritrol DK-LV-MF 1" Medium-Flow Regulator & Fittings without Valve 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 40 years, these all-inclusive kits come complete with all the necessary components you need for a drip zone. Coupled with the added reliability of the industry’s most popular valves, these kits include a Y-filter, pressure regulator and all the essential fittings to make a complete drip zone.