The Relexa Wall Union in Brushed Nickel is made from premium materials, this item offers great function and value for your home. This fixture is part of Grohe's decorative collection, so make sure to check out other styles of fixtures to accessorize your room. Wall mount installation 1/2" NPT thread Check valve included to prevent backflow Codes/Standads Energy Policy Act of 1992 ASME A112.18.1/CSA B125.1 Key Features & Innovations StarLight Made to last surfaces ranging from precious matt to shiny like a diamond.