A pet wash station is provided that includes a wash room with a pet wash tub and a flexible spray hose to enable washing a pet in the tub. The tub drains into a collection trough in the floor of an equipment room. The equipment room and wash room share a common wall. The wash room floor extends under the common wall into the equipment room. The wash room floor drains towards the common wall, through a space between the wash room floor and the common wall, and into the trough in the equipment room floor.