ABS Shower heads: ABS (Acrylonitrile-Butadiene-Styrene) is an opaque thermoplastic polymer material made from the monomers Acrylonitrile, 1,3-Butadiene and Styrene. Strong and durable even at low temperatures, it offers good resistance to heat and chemicals and is easy to process.
To ensure there's room to install the body shower, take off the cover plate to expose the valve body and the water lines. Shut off the water at the main using a curb key. Close the valves at the water heater, and turn off the power to the water heater.