Includes an Inline Check Valve and a regular Check Valve. Availability: 1 piece. Valve types and sizes - UPVC Gate Valve available in 1/2 inch and 2 inch sizes - PVC Diaphragm Valve - Globe Valve Precision flow control - Precision Flow Adjustment Plastic FineTuning Valve for accurate, repeatable control of throughput Color and size options - Color option: 1 inch (32 mm DN25) variant available - Dark Gray color option also offered, size not specified in the title Why this kit helps you - Backflow prevention: protects your system from reverse flow and contamination - Flexible compatibility: designed for common UPVC piping sizes (1/2", 2"), plus PVC diaphragm and globe valve configurations - Accurate control: fine-tuning valve enables precise flow adjustment for delicate processes or irrigation - Durable materials: UPVC and PVC provide corrosion resistance in standard water applications - Simple installation: compact components and compatible port sizing streamline setup Use scenarios - Home irrigation: backflow prevention with adjustable flow for lawn and garden zones - Domestic water supply: reliable shutoff and controlled delivery to appliances or fixtures - Light industrial/process lines: backflow protection with precise flow tuning for small-scale operations