This is our third season and we have the metal coil that sits in the bottom of the pump strainer housing, under the basket. It has a piece of metal coming out the drain hole and that is attached to both sides of the copper that runs around the pool. The O ring on the drain plug is cracked and I'm pretty sure that's where a small air leak is coming from. But I cannot figure out what that kind of drain plug is called to find another one! Everything I find is a completely closed plug, which leads me to believe that there has got to be another way to bond the pump to the copper. FWIW, the copper is ALSO connected to the pump near the power switch. This is just how the pool installer did it, so not sure it's overkill? I did find another entire "retro-fit kit" but I just need the little drain plug with the hole in it!
