Have Pac-Fab(Pentair?) sp-710 sand filter control, rated 75 G.P.M., 6 position ... there is the # 5037 on lable @ 3:00 position
Leaks very slowly(for now) out top of unit, under handle. Also, handle broken, but not cause of leak.
have hunted parts but none found under sp-710. Figure while in control, might as well replace spider gasket as well. would love to find a new handle and valve gasket kit.