High Quality Material - Crafted from brass material, this check valve ensures long-lasting performance and reliability, perfect for heavy-duty water applications. Efficient Control - With a DN20 standard internal female thread design, this check valve offers precise and efficient control, ideal for enhancing heating circuit distribution and energy-saving water usage. Easy Installation - Conveniently designed for easy installation, this check valve features an arrow mark indicating the direction of water flow, making it simple and straightforward to use. Pressure Resistance - With a nominal pressure of 232psi, this check valve is built to withstand high pressures, ensuring a secure and leak-free connection for your water system. Versatile Usage - Suitable for a wide range of applications, this check valve is designed for vertical backwater installation and one-way regulation, making it a versatile and essential component for water systems.