cUPC Certified Pressure Balance Cartridge: The advanced pressure balance ceramic disc cartridge with cUPC certification can prevent scald injury caused by sudden changes in hot or cold water pressure. If inlet water temperature changes seasonally, please follow included instructions to readjust the temperature limit stop. The recommended water temperature for the bath or shower is between 90°F - 110°F. Waterfall Tub Spout: This tub shower faucet set features a widespread waterfall tub faucet with large water flow (no less than 5 GPM). This tub spout can fill a common tub (about 53 gallons, 1/2 full) within 8 minutes. The package comes with an extra aerator that has a flow rate of 1.8 GPM, 6.8 L/min at 60 PSI, which is compliant with California water efficiency regulations. This extra aerator must be used to replace the preassembled aerator if used in California. 3-Function In 1 Switch: Select among 10" 304 stainless steel overhead shower, hand shower and tub spout with just ONE switch. This shower valve comes with built-in diverter-simple and elegant design. Ceramic disc diverter valve provides smooth and easy function-switching operations. Brass Faucet: One-piece sturdy BRASS faucet body ensures quality and longevity. Threads are standard 1/2" NPT tapered, is easy to install and leakage proof. Plumber's tape is included for FREE! Installation Suggestion: The maximum distance between the stringer and the front surface of finished wall is 3.3" (85mm), and the minimum distance is 2.3"(60mm). The Recommended Distance is 2.7" (70mm) for installation.