Prevents Water Hammer: The pressure-balanced valve includes two built-in check valves that effectively eliminate water hammer noise. The cartridge of the pressure balance valve monitors water pressure balance, helping to protect you from scalding due to sudden changes in hot or cold water pressure.   Ultimate Upgraded Shower System: Experience true luxury shower with this Aposhion shower system. Crafted from advanced ABS material, it offers exceptional durability, rust-free performance, and impact and heat resistance, enhancing efficiency by 40% The Supreme High-pressure Shower: The 12 * 8 inch rain shower’s ultra-thin design delivers high pressure even in low water conditions. Air injection technology boosts water pressure, simulating natural rainfall for a refreshing shower experience High-purity Silicone Hose: This black shower faucet set includes a high-purity silicone hose for outstanding reliability. Its design ensures secure attachment and lasts twice as long as other materials. Tested to over 250,000 uses with zero detachment Top-notch Craftsmanship: This shower system boasts an all-metal build with a solid H59 brass valve for leak-proof, rust-resistant durability. Its matte black finish, from a 5-layer coating and anti-fingerprint treatment, passed a 10-level salt spray test Safety-first Design with High-quality Certifications: The Aposhion shower faucet set is certified by cUPC and CEC, meeting ASME A112.18.1-2018/CSA B125.1-18 standards. This ensures safe water temperatures, protecting children and pets from sudden changes User Manual (PDF)  Review the FAQs for additional information.