Includes One-Piece Cartridge: Simplifies installation and maintenance. Double Ceramic Pressure Balance Cartridge: Combination of Ceramic Disc Mixing Valve and a Ceramic Balancing Spool in a one-piece cartridge. Ceramic Balancing Spool: Maintains a constant output temperature in response to changes in relative hot and cold supply pressure. Ceramic material is unaffected by mineral deposits and harsh water conditions. Integrated Check Valves: Engineered to eliminate cross flow. Adjustable Hot Limit Safety Stop: Limits the amount of hot water allowed to mix with cold. Reduces the risk of accidental scalding. Comfort Zone: Offers a wider shower range to fine tune the desired temperature within the useful temperature zone. 8" 1.75 gpm/6.6 L/min maximum flow Shower Head Compatible Rough-in: RU101, RU102, RU107, RU108, RU109 (Sold Separately)