The Water Control Unit comes packaged with a stainless steal mounting plate, two drains, and stainless steal screws. The mounting plate allows installation on any type of pool wall. A Water Control Unit can easily be installed on any existing pool. With a small cut in the concrete, you can simply access the pool wall and insert the water control unit. Installation on a new pool is even easier. The walls are already exposed and there’s no cutting through the deck. Some pools may need two units, which can be hooked up together so only one unit will discharge the water.