I just bought a house with an above ground pool and I have a leak from the part shown below. There is the tube coming from under my pool that connects into the part below, which then goes into the pump. It looks like there is a loose connection, but I'm not sure what the part is or how to replace it. It seems like there is always water pressure going through the part, so if I were to unhook it, then water would just keep coming how. Can anyone point me in the right direction? Thanks.