This Noble Warewashing 49512021333 pressure switch assembly is a direct replacement for the one that came with your Noble Warewashing glass washer. It includes everything you need to replace a worn or broken pressure switch, including a pressure switch fitting, a chamber, an O-ring, and a chamber O-ring. Replacing a broken pressure switch will help keep your unit operating efficiently. It's compatible with Noble Warewashing HTGW glass washers.