A PVC ball cock body is a plumbing component used in toilet cisterns to control the flow of water into the cistern. It is typically made of PVC (polyvinyl chloride), a durable and lightweight plastic material that is resistant to corrosion and chemicals. The ball cock body consists of a hollow cylindrical body with a ball float inside that rises and falls with the water level in the cistern. When the water level drops, the float lowers and opens a valve at the bottom of the ball cock body, allowing water to flow in and refill the cistern. As the water level rises, the float rises and closes the valve to stop the flow of water. PVC ball cock bodies come in various sizes and configurations to fit different types of cisterns. They are typically installed with a float arm and ball cock float valve to complete the assembly. When installing a PVC ball cock body, it's important to ensure that the valve and float arm are properly aligned and secured to prevent leaks and ensure proper operation.