A bathtub comprising: a tub having an enclosure defined by at least one sidewall for holding a water capacity; a doorway on said sidewall for providing access to the tub; a sealing strip installed on the periphery of the doorway, the sealing strip comprising a sealing valve, a door mountable onto said doorway; a mechanical drain for emptying the tub; a drain valve; and a controller connected to a door position sensor for detecting an elevated locking position of the door, a water detection sensor for detecting the water level in the tub and a pressure sensor for detecting a pressure in the sealing valve of the sealing strip; characterized in that the door is arranged for holding at least two water levels in the tub and the bathtub comprises: an actuator for moving the door over the doorway allowing a user to move the door between at least three positions including a lowered, an intermediate and an elevated positions, the door in the intermediate and elevated positions holding the water at said two water levels respectively; a door position sensor for detecting an intermediate locking position of the door; a door drip fixed under the door to catch the water in the sealing strip when the door is in the lower position; a double reservoir for receiving water from the tub through the drain and water from the door drip, wherein the door drip is incorporated to the double reservoir; a water detection sensor for detecting the water level in the reservoir; a control interface; and in that the controller is configured to: receive input controls signals from the control interface for security control; receive input door lock position signals from the door position sensors; receive input water detection signals from the water detector sensor; receive input pressure signals from the pressure sensor for sealing the door; send control signals to control the sealing valve of the sealing strip; and send control signals for operating the drain valve. a tub having an enclosure defined by at least one sidewall for holding a water capacity; a doorway on said sidewall for providing access to the tub; a sealing strip installed on the periphery of the doorway, the sealing strip comprising a sealing valve, a door mountable onto said doorway; a mechanical drain for emptying the tub; a drain valve; and a controller connected to a door position sensor for detecting an elevated locking position of the door, a water detection sensor for detecting the water level in the tub and a pressure sensor for detecting a pressure in the sealing valve of the sealing strip; a door position sensor for detecting an elevated locking position of the door, a water detection sensor for detecting the water level in the tub and a pressure sensor for detecting a pressure in the sealing valve of the sealing strip; the door is arranged for holding at least two water levels in the tub and the bathtub comprises: an actuator for moving the door over the doorway allowing a user to move the door between at least three positions including a lowered, an intermediate and an elevated positions, the door in the intermediate and elevated positions holding the water at said two water levels respectively; a door position sensor for detecting an intermediate locking position of the door; a door drip fixed under the door to catch the water in the sealing strip when the door is in the lower position; a double reservoir for receiving water from the tub through the drain and water from the door drip, wherein the door drip is incorporated to the double reservoir; a water detection sensor for detecting the water level in the reservoir; a control interface; an actuator for moving the door over the doorway allowing a user to move the door between at least three positions including a lowered, an intermediate and an elevated positions, the door in the intermediate and elevated positions holding the water at said two water levels respectively; a door position sensor for detecting an intermediate locking position of the door; a door drip fixed under the door to catch the water in the sealing strip when the door is in the lower position; a double reservoir for receiving water from the tub through the drain and water from the door drip, wherein the door drip is incorporated to the double reservoir; a water detection sensor for detecting the water level in the reservoir; a control interface; receive input controls signals from the control interface for security control; receive input door lock position signals from the door position sensors; receive input water detection signals from the water detector sensor; receive input pressure signals from the pressure sensor for sealing the door; send control signals to control the sealing valve of the sealing strip; and send control signals for operating the drain valve.