Tublift slowly & steadily rises to 21 inch using standard household water pressure & lowers to within 2 inch of tub bottom. Connects to standard shower or tub spout fixtures, diverter provided. Available w/arm mounted controls for self-operation. Lightweight, weighs 19 lbs & lifts up to 200 lbs with water pressure as low as 20 PSI. One-Year Limited Warranty.