The hose that goes from my sand filter to the pump is just a slip-on connection. I push the hose tightly onto the end of the hard plastic protrusion from the filter and then use those clamps to tighten them. It does not use a gasket. And the drain plug on the sand filter at the bottom is just a cap that screws on tightly but it is a lot smaller than that gasket. I will send the pic to the guy that closes my pool and ask him?What about the return plumbing on the filter. It's either blocked in the image or not hooked up yet.
View attachment 576365
Just your pump lid gasket.