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【Premium Brass Construction】 – Crafted from high-quality, high-temperature forged brass with a thickened body for enhanced durability and pressure resistance. The built-in stainless steel strainer ensures long-lasting performance, rust resistance, and minimal maintenance. 【Multifunctional All-in-One Design】 – Combines a Pressure Reducing Valve (PRV), Non-Return Valve (NRV), strainer, and shut-off valve into one compact unit. It automatically balances pressure, filters debris, prevents backflow, and allows manual shut-off when needed. 【Adjustable Pressure Control】 – Easily fine-tune system pressure between 0-4 bar using the top-mounted dial and a screwdriver. The clear display and simple adjustment make it user-friendly for precise control. 【Versatile & Wide Application】 – Designed to handle temperatures from -10℃ to +120℃ (14℉ to 248℉) and compatible with water, oil, and non-corrosive combustible gases. Ideal for solar water heater systems, wall-hung boilers, central air-conditioning water systems, and closed-cycle heating or refrigeration systems. 【Reliable Performance with Warranty】 – Manufactured by Biella with a focus on quality and durability, this filling valve comes with warranty protection against manufacturing defects, ensuring long-term reliability and peace of mind. 💧 Product Description: The Biella Brass Automatic Water Heater Filling Valve is a multifunctional solution designed for efficiency and reliability in solar water heater systems and other closed-cycle heating or cooling setups. Built with premium brass and a durable stainless steel strainer, this valve resists high pressure, rust, and wear, ensuring long-term performance. Its integrated design features a PRV, NRV, strainer, and shut-off valve, streamlining installation and maintenance while providing automatic pressure regulation, backflow prevention, and manual control. The adjustable pressure dial (0-4 bar) makes it simple to customize to system needs. Suitable for use with water, oil, and non-corrosive gases within a broad temperature range (-10℃ to +120℃), this valve offers versatile application. Backed by Biella’s warranty on manufacturing defects, it’s a reliable choice for homeowners and professionals alike.