I have a Hayward e-series high rate sand filter. I have recently been getting sand into my pool, so I decided to replace the sand. Glad I decided to, there is a hold in the bottom where the laterals screw in to. I don't know what part this is, could anyone help me out please? Also where would I get it and it seems like the pipe coming into the white piece is glued in, how would I get that off? Thank you all so much in advance!!!