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 following 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. Preventing Water Hammer: This shower valve body is made of one-piece solid BRASS, ensures quality and longevity. Furthermore, the shower valve comes with an extra function of preventing water-hammer, runs quieter, and protects your piping system, which brings you a comfortable shower experience that seems like under the natural raindrop. (Installation Note: The adjustable distance for valve box installation is 2.36" to 3.35" / 60mm to 85mm.) Sturdy And Durable : Both the shower holder and the exterior material of the handheld shower are constructed of STURDY BRASS, ensuring high quality and longevity. Moreover, high-quality matte black finish brings a modern touch to your bathroom while resisting daily scratches, corrosion, and tarnishing. Tangle-Free Shower Hose: Strengthened stainless steel spiral wound hose is a tangle-free design and can be extended from 59 to 75 inches (1.5-1.9 meters), convenient for various purposes, such as cleaning your shower and even bathing your pets.