I bought a new return pipe for my tank and when I opened it up to put it together I was confused on how it is supposed to stay in place. The return line for the water has two adapters, one that screws in and another that slides into that one for use with a smaller return line hose. How is this piece supposed to stay in place without leaking? Am I supposed to silicone it or something? I am new to plumbing tanks so any help will be appreciated! Here are some pics of what I am looking at. The first pic is showing the piece that slides into the other piece, which then screws into the pump. It doesn’t make any sense cause it just slides in and out. The return hose I have is not wide enough to fit over the larger piece, unless I heat it up a lot and try to force it on. Thanks