The McAlpine CONVALVE-125 Convalve is a non-return valve that is designed to prevent backflow or reverse flow in plumbing systems. This type of valve is commonly used in situations where it is essential to prevent contaminated water from flowing back into the main water supply. The CONVALVE-125 features ¼" universal connections, which means that it can be easily integrated into a variety of plumbing systems. The valve itself is made from durable materials and is designed to provide reliable and long-lasting performance. One of the key benefits of the CONVALVE-125 is that it is a non-return valve, which means that it only allows water to flow in one direction. This helps to prevent contamination and ensures that water is always flowing in the correct direction. Overall, if you are looking for a reliable and durable non-return valve for your plumbing system, the McAlpine CONVALVE-125 Convalve with ¼" universal connections is an excellent choice.