That's not much info but I assume someone is trying to direct you to a sump point (wellpoint) whereby you can extract water from behind the liner. It usually doesn't "stick out" but it rather is covered like a skimmer. You may not have any, also.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!