Gerber Plumbing Pressure Balance Spool for Tub and Shower

Maintain consistent water temperature delivery with the durable pressure balance spool. Durable, stainless steel construction is designed for lasting operation. | Washerless cartridge with pressure balance spool ensures even water temperature in the event of pressure changes | Measures 3 1/4 x 3 3/4 x 1 23/40 inches | Automatically senses and adjusts to water pressure changes to prevent accidental scalding | Simple, drop-in replacement makes installation fast and easy