At least 35 years old. Motorized with a bunch of discs mounted on a rotating shaft, that are nothing more than 8" round window screens. No pads to absorb water just the screens. Stainless steel body. Motor still works but the floats shot. Tore it out of a home today. If I ever figure out how to post pictures I'll put it on. Don't bother with explaining how since I can't seem to get it to work when someone does anyway.