Lateral Flush Valve – Keeps Your Irrigation Running Smooth The Lateral Flush Valve is a simple but vital component that helps prevent clogging and air build-up in your irrigation system. Installed at the end of each watering zone, this valve flushes debris before every irrigation event and releases trapped air as the system fills with water — protecting your emitters and maintaining consistent performance. Key Features 2-in-1 design: Combination air relief and flush valve. Prevents clogging: Automatically flushes debris before each cycle. Air relief function: Expels trapped air to stabilise water flow. Durable build: Made from weather-resistant, non-corrosive materials. Easy maintenance: Removable top for quick access and cleaning. Variable flow diaphragm: Flip for low or high flow applications. Flow & Pressure Ratings Low Flow Side: 2–5 GPM High Flow Side: 5–12 GPM Operating Pressure: 8–25 PSI Maintenance & Diaphragm Cleaning To remove or adjust the diaphragm, rotate the green locking ring counter-clockwise to lift the cover. You can then remove the diaphragm for cleaning or flip it over to switch between low-flow and high-flow configurations. Tip: Always install the Lateral Flush Valve at the end of your watering zone for the best performance and system protection.