APEX RAINAID VALVE 20MM Apex Rainaid valve is designed to be connected to mains water supply on a rainwater collection tank and will provice backup supply of water in the event of demand exceeding rain supply.The adjustable water levels optimize efficiency by reducing electricity usage and extending pump life. It features a full on full off function ensuring reliable water flow control. No float switches or external power source are required making it a low-maintenance solution. The pump requires a pressure switch for proper operation. Designed with a long tail it eliminates the need for additional tank fittings on thin-walled tanks simplifying installation and reducing potential leaks. Ideal for various water storage applications it enhances performance and durability.