3-piece Type P (pressure balance) deck-mount tub filler with hand shower EXPANSION PEX Drilling hole diameter, volume control = 1 5/8 (41mm), spout = 1 1/8 (28mm) and hand shower = 1 1/4 (32mm) 1-jet hand shower/scale-free Ceramic cartridge and balancing spool with check valves ½ inlet EXPANSION PEX