The AquaFX ASO Valve Only is a crucial hydraulic automatic shut-off component designed for reverse osmosis and deionization (RO/DI) systems. This essential valve intelligently monitors the water level in your storage reservoir, automatically halting the incoming feedwater flow once the reservoir is full or the system's float valve engages. It effectively prevents overflows and conserves water, ensuring your purified water supply is managed efficiently and safely for your saltwater aquarium.

This product specifically provides only the Automatic Shut Off (ASO) valve itself. It is imperative to note that a separate check valve is required within your RO/DI system to prevent backflow, which is not included with this standalone valve. For those who do not currently possess a check valve, the comprehensive Automatic Shut Off Kit, which includes the ASO, a check valve, and additional tubing, would be the more suitable option.

This individual AquaFX ASO Valve is ideally suited for reef aquarists who already have a functional check valve integrated into their existing RO/DI setup and simply need to replace a worn-out ASO or add this critical automation feature. It offers a targeted and economical solution for maintaining or upgrading your pure water production system without purchasing redundant components. Ensure your RO/DI system has all necessary parts for optimal performance and longevity.