Walk-in bathtubs, also called safety tubs, allow users to enter without climbing in. Watertight doors swing open when the tub is empty, creating an entryway rarely more than a few inches above the floor. Once the bather is properly seated, oversized faucet controls make water temperature adjustments much easier than in a traditional bathtub. Walk-in bathtubs may also contain hand-held shower nozzles, standard shower heads and/or jacuzzi-style therapeutic water jets.

Walk-in bathtubs are primarily marketed towards the elderly or handicapped population, although their compact design and added features have proven appealing to a wide range of customers. Walk-in bathtubs are often taller and narrower than traditional bathtubs, making them ideal for smaller spaces such as laundry rooms and converted closets. If a homeowner should become a caretaker for an elderly or infirmed relative, a walk-in bathtub may be a good option for a second bathroom.

Many of us take bathing for granted, but it can be a tremendous challenge for those in wheelchairs or otherwise restricted in movement. Walk-in bathtubs often feature raised seats for a safer transfer from wheelchair to bath and back. Elderly users can opt to take a seated bath or use the seat as leverage. For more independent living, some walk-in tubs include a transfer bar and side rails. Therapeutic jets can sooth aching muscles and restore some mobility.

One controversial aspect of walk-in bathtubs concerns the watertight doors. Some walk-in bathtubs utilize an inward-swinging door while others utilize an outward-swinging door. The debate over which system is preferable hinges on safety and economic concerns. An inward-swinging door allows the user to walk directly into the tub, but he or she must maneuver around it once inside. This may not be easy for a handicapped user. As the tub fills, the pressure of the water keeps the inward-swinging door closed tightly. Until the water is completely drained, the door will not open easily. This could be troublesome in an emergency. Most walk-in bathtubs sold today use an inward-swinging door because the design is cost effective and proven safe.

Some manufacturers believe that an outward-swinging door is preferable. As long as there is enough clearance for the door, the user can enter the bathtub and close the door without excessive maneuvering. Walk-in bathtubs with outward-swinging doors may use mechanical means to insure a tighter seal. The main advantage of an outward-swinging door is a quicker escape during an emergency, as the door can still be opened quickly if the tub is full. The door can also be used as additional leverage for wheelchair-bound bathers. Walk-in bathtubs with outward-swinging doors may be more expensive, but for certain types of physical conditions they may be a better choice.