Does anyone know the difference in a Hayward Vari-Flow valve part # SP0714T and a SP0714C. Several places says yoy cant by a spider gasket kit for the valve, and have to get the whole key assembly. Amazon on the other had, advertises spider gaskets from several different places? I have the SP0714C valve, and dont see that part number anywhere. All i see is for SP0714T? Can anyone please help me? Any help would be greatly appreciated!