ForcedInduction
Active Member
i'm assuming it should be a half inch hole because they are half inch fittings
http://cheaphydroponics.com/store/view-all/sunleaves-fill-drain-kit-1/2-/prod_44.html
http://cheaphydroponics.com/store/view-all/sunleaves-fill-drain-kit-1/2-/prod_44.html