Automatic Water Tank Float Valve for level control. It automatically refills or stops filling to maintain a preset water level, preventing overflow and reducing water waste. Function and benefits: Regulates flow to keep the tank at the target level; stops filling when the level is and resumes when it drops. Improves consistency and reduces manual checks. Durable construction: Brass main body for stability; plastic floating ball resists cracking; rubber seal provides reliable leakage protection and durability at various temperatures. Size and compatibility: Available in 1/2' DN15, 3/4' DN20, and 1' DN25. Adjustable arm allows setting the desired level; easy to connect to standard supply tubes. Installation and adjustment: Simple to install and adjust the water level with the adjustable arm; suitable for common fittings and configurations. Sealing and reliability: Wellsealed with a rubber seal to minimize leaks; designed for long service life with good flexibility and wear resistance. Practical applications: Domestic water tanks to prevent overfill; livestock troughs and farm waterers to maintain steady supply; irrigation ponds and garden tanks for automatic refilling; hydroponic and nutrient reservoir systems that require stable water levels.