Food grade material: All valve bodies are made of food grade 304 stainless steel, providing a beautiful, durable appearance and safe direct use for daily drinking water needs. Broad compatibility and no power needed: Suitable for water tanks, kitchens, water towers, pools, refrigerators, solar water tanks, and animal waterers. It does not require electricity and can be connected to a clean water supply with a pressure greater than 0.2 kg to achieve automatic water level control. Responsive performance: Solid floating cores are more durable, extending the product's service life while delivering reliable water level control. They are more sensitive to changes in water shortage and replenishment. Durable construction: Antifriction and impactresistant hard shell protects the device, helping minimize wear and extend lifespan. Practical use scenarios: In a home water storage tank or kitchen reservoir to maintain constant water level without electricity. In solar water tanks or water towers to regulate supply efficiently. In pools or animal water troughs to prevent overflow and ensure steady, reliable water availability.