Don't need a new washer, it should have a tapered finish, I.e it crates a tight seal without any other parts. Just tighten by hand until you can't any more, then a few turns with the (12mm?) Allen Key. Found it easier with a 12mm Hex bit on the end of a socket set
Don't need a new washer, it should have a tapered finish, I.e it crates a tight seal without any other parts. Just tighten by hand until you can't any more, then a few turns with the (12mm?) Allen Key. Found it easier with a 12mm Hex bit on the end of a socket set