The Haws 1RKHO.H sensor retrofit kit includes an electric solenoid valve controlled by a sensor that will convert most Haws standard push button operated wall-mounted single station drinking fountains, and 1920 bottle fillers to be touchless, which allows these products to be operated hands-free. Each kit contains a touchless, motion activated sensor that activates a stainless steel solenoid valve to start the flow of water, a valve regulator to control the amount of water delivered to the fountain or bottle filler, and a hard-wired transformer (mounted inside a wall, away from water). Not intended for freeze-resistant models.