WIDE RANGE OF USE: The non-return valve adopts DN15 standard internal thread, which is usually used for water and also used to connect to most pipeline systems, such as chemical, pharmaceutical, and petroleum. HIGH-QUALITY SERVICE: We strive to provide you with high-quality and convenient service. If you have any questions about our products, welcome to contact us, we will give you a satisfactory answer. EASY TO INSTALL: The check valve is made of high-quality brass material, strong and durable, easy to use and easy to install, with an arrow indicating the direction. HIGH PRACTICALITY: This is a check valve that only allows water to in It is widely used in many places and is very practical. IDEAL VALVE: This check valve adopts DN15 standard internal thread, with a nominal pressure of 232psi, which is an ideal water check valve.