Abstract: A valve wrench for tightening a male adaptor onto a valve. The valve wrench includes a base member having a pair of opposing ends. Each of the ends of the base member has a bore. The bore of each of the ends extends through the base member whereby the bore of each of the ends is designed for receiving the male adaptor. The base member is designed for being gripped by a hand of the user. Each of the ends of the base member has plurality of angled teeth. The angled teeth inwardly extend from an interior surface of an associated one of the ends of the base member whereby the angled teeth are designed for engaging the male adaptor to preventing slipping of the base member with respect to the male adaptor when the base member is being used to rotate the male adaptor with respect to the valve.