Features: The water pump is designed for water circulation only and is not intended for water pressurization. It supports submersible installation for cold water applications and is fully waterproof. The motor stator and circuit board are encapsulated with epoxy resin, providing complete isolation from the rotor, ensuring reliable long-term underwater operation. The pump features high-performance ceramic shafts for high precision and excellent shock resistance. It is equipped with a built-in DC brushless motor that operates smoothly, spark-free, with low noise and extended service life. The precision配合 between ceramic sleeve and ceramic shaft reduces noise to below 35 decibels, with some units achieving as low as 30 decibels, resulting in near-silent operation. Application: Suitable for water circulation systems, refrigeration systems, solar thermal systems, recirculation in water heaters, water dispensers, floor heating systems, fountains, and similar applications. Specifications: Material: Plastic + Metal Size: Approx. 9 x 6 cm (3.54 x 2.36 inches) Voltage: 12 VDC Fluid Temperature Range: 0°C to 110°C Rated Operating Life: Over 40,000 hours Current: 0.7 A Inlet/Outlet: 1/2 inch male thread Maximum Flow Rate: 8 L/min (2.1 GPM) Maximum Head: 3 meters (9.8 feet) Maximum Circulating Water Temperature: 100°C (212°F) Note: Not suitable for continuous immersion in water at 100°C (212°F) Noise Level: 30 dB at 1 meter Note: Allow 1–2 cm variation due to manual measurement. Please verify dimensions before ordering. Color may vary slightly due to monitor display differences. Package Includes: 1 x Pump 2 x Brass Coupler 2 x Stainless Steel Clamp