CHECK VALVE QF-020-I 3/8'' TUBE – 3/8'' TUBE WATERRO CHECK VALVE QF-020-I is a one-way check valve from the Quick Fit range, designed for reverse osmosis and water treatment systems. It connects two 3/8-inch tubes and allows water to flow in only one direction. The check valve prevents backflow and helps protect membranes, pumps, pressure tanks and other system components. The Quick Fit connection enables fast, tool-free installation and a secure, leak-tight connection. The connection can be reused. Technical specification Parameter | Value Product | Quick Fit range check valve Model | QF-020-I Connection A | 3/8" Quick Fit tube Connection B | 3/8" Quick Fit tube Valve type | One-way check valve Flow direction | One direction Application | Reverse osmosis and water treatment systems Key advantages One-way check valve for the line 3/8" × 3/8" Quick Fit connections Prevents water backflow Protects RO membranes and system components Fast Push-Fit installation Leak-tight connection Reusable No special tools required Suitable for RO and water treatment systems