The cUPC certified bathtub faucet set includes a pressure balance valve, which is made of high-purity brass. This shower needs to be used with this valve. If the cold water pressure suddenly stops, the valve will stop water, you’ll never scalded by hot water. This bathtub faucet set contains only top-quality, carefully selected metal parts, guaranteed to last for years regardless of intensive use. The stainless steel and brass combination are non-corrosive, and polish chrome finish give a brights look to any bathroom decor! The 8-inch rainfall shower head of this shower faucet set is ultra-thin, simple and stylish. Mixing with air, it has high pressure water. Easy-to-clean silicone nozzles are on this rainfall shower head. You wipe away easily calcium and lime build up with touch of a finger. The package of our Homelody bathtub faucet set includes 8-inch 304 stainless steel rainfall shower head, brass shower valve, bathtub faucet, 16-inch brass shower arm, decorative covers, installation manual. Universal thread specifications: standard American NPT 1/2 '' tapered thread. We recommend you to replace the whole new shower faucet set complete, including valve body, because the original valve body are not be suitable for the Homelody shower set.