Schedule 40 caps are a handy fitting used to terminate runs of a pipe. Due to the domed nature of the Schedule 40 cap, air naturally pools in the end; when the line is under pressure, the air that pools inside the cap is compressed instead of blowing the end off the pipe. As a result, it is imperative to use the right kind of cap for your application, especially in a pressure scenario. Be sure to consult Drainage Connect's guide for the max pressures you're able to run for your PVC line. If you don't see the product you are looking for on our site, please use our Contact Form.