Open Access
While alcove and free-standing tubs are the most common types of bathtubs you’ll find in typical homes, walk-in tubs can provide an alternative for people seeking greater accessibility and comfort in their bathing experience.
A walk-in tub can hold 40 to 80 gallons of water, which is more than a normal tub. These tubs often come equipped with safety features, such as a door and seat, and may even require an upgraded water heater to sufficiently heat the increased amount of water in the tub.
Key Insights
The typical walk-in tub holds 40 to 80 gallons of water, nearly twice as much as a standard bathtub, which holds 25 to 45 gallons.
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Walk-in tubs can run from 38 to 84 inches long but are typically about 52 inches long — smaller than standard bathtubs that run 60 inches in length
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If the tub’s capacity exceeds your current one, you may need to upgrade your water heater for larger walk-in tubs.
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Walk-in tubs have several health benefits to relief of support individuals with chronic diseases.
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While filling and draining times vary based on water pressure, a typical walk-in tub can take about 6 to 15 minutes to fully drain, and the door must remain closed as the water drains.
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General Walk-In-Tub Statistics
While walk-in tubs may be a costlier option than typical bathtubs equipped in most homes, the U.S. market for these upgraded tubs was valued at $750 million in 2023 and is expected to reach nearly $942 million by 2028 with a compound annual growth rate (CAGR) of 3.70% during this period.
The growing market for walk-in tubs comes as a rising aging population and higher rates of obesity drive greater interest in more accessible tubs.
The decision to purchase a walk-in tub comes with various pros and cons, such as greater accessibility and relaxation, as well as longer fill and drain times. A walk-in tub costs somewhere between $3,750 to over $31,500, depending on model, size, type, and features. The walk-in tub installation costs come separately.
Walk-In Tub Capacity
When purchasing a walk-in tub, it’s important to consider your home’s water heater capacity. The average capacity of a walk-in tub is 40 to 80 gallons, while a regular bathtub can only hold between 25 and 45 gallons. A larger tub can also hold up to 100 gallons of water but isn’t commonly used due to too much capacity.
If a water heater’s capacity is lower than that of a tub, there may not be enough hot water to fill the tub. Generally, you’ll need a water heater with a capacity of at least two-thirds the size of the walk-in tub. Manufacturers may also provide information about recommended water heater capacity based on a tub’s size.
Depending on a home’s water pressure, fixtures, plumbing, and the tub itself, most walk-in tubs take up to 10 minutes to fill and up to 15 minutes to drain.
How Does a Walk-In-Tub Work?
Walk-in bathtubs are built with a low step-in (between 2 to 8 inches) that allows for easier tub entry and exit by simply stepping directly in or out of the tub using grab bars instead of crossing over the tub’s side by lifting one leg after another.
Best walk-in tubs are equipped with sealed doors (to prevent leaks) that can open either inward or outward and from the left or the right. Tubs also usually come with a textured surface to prevent mobility issues, a heated seat, and a hand-held shower or showerhead with a faucet.
Many models include air jets for gentle massaging, backrests for added comfort, and advanced drain technology to speed up water removal.
To use a walk-in tub, simply open the door, step inside, and close the door before filling the tub. After bathing, allow the tub to drain before opening the door and exiting fully.
Tub size, a home’s water pressure, and the age and quality of the plumbing can all affect the fill time and drainage of a tub.
- Time to fill up a standard walk-in tub: six to eight minutes
- Time to drain water out of most walk-in tubs: six to 15 minutes
- Time to drain water out of fast-draining models: two to four minutes
Water Heater Size for Walk-In Tubs
Water heaters should be at least two-thirds the size of your walk-in tub to fill up an adequate hot water supply. For example, if you have a tub that holds 80 gallons of water, you would need a water heater with a capacity of at least 60 gallons.
Tankless water heaters can also fill up your walk-in tub. But, before buying, you should consult with a professional plumber for precise sizing based on your home’s plumbing and water usage.
Types of Walk-In Tubs
Walk-in tubs are typically about 52 inches long. However, the size of walk-in tubs can vary significantly, from as small as 38 inches long for a “cub model” or “front loader,” which have limited accessibility, to as long as 84 inches for large walk-in tub and shower combinations.
Common varieties of walk-in tubs include the following:
Who Should Consider a Walk-In Tub?
The walk-in tub is highly suitable for seniors, people with disabilities, or individuals seeking luxury bathing options. These upgraded tubs have therapeutic benefits for healing, easing pain, and improving movement. They are secure and prevent fall risks.
Whether you have sore muscles or struggle with bathing, walk-in tubs give seniors who live alone the independence to wash themselves. It also makes assistance in bathing easy for caregivers or family members.
Benefits of Using Walk-In Tub
Many seniors in the U.S. live with chronic illnesses such as arthritis, fibromyalgia, hypertension, and cardiovascular diseases, which can significantly impact their daily activities and overall quality of life.
Recent studies and anecdotal evidence support the claim that walk-in tubs provide health benefits that may help manage these conditions. Here’s how they may assist with specific chronic illnesses:
- Arthritis and Fibromyalgia: The warm water therapy in walk-in tubs helps relax muscles, reduce joint stiffness, and alleviate pain associated with these conditions. Many tubs also feature built-in seating, making it easier for individuals with limited mobility to bathe comfortably.
- Hydrotherapy Benefits: Walk-in tubs equipped with hydrotherapy jets provide a massaging effect that promotes relaxation, flexibility, and muscle recovery. These water jets can help relieve tension in muscles and joints, making them ideal for individuals managing chronic pain.
- Cardiovascular Health: Soaking in warm water can improve blood circulation by dilating blood vessels and enhancing oxygen delivery to tissues. This may be beneficial for older adults or those with circulatory issues, as it reduces cramping and supports overall cardiovascular health.
*Individuals with severe heart conditions should consult their doctor before using a walk-in hot tub. - Stress and Anxiety Reduction: The warm water and soothing effect of a walk-in tub can help reduce stress levels. Combined with hydrotherapy features, these tubs encourage mental relaxation, which can positively impact overall well-being.
- Blood Sugar Regulation: Some studies indicate that regular warm baths can help lower blood sugar levels in individuals with Type 2 diabetes.
FAQs
How big is a walk-in tub?
A walk-in tub is usually about 52 inches long but can vary from 38 inches to 84 inches in length. Typical walk-in tubs can hold anywhere from 40 to 80 gallons, significantly more than traditional tubs that hold 25 to 45 gallons of water.
Do I need a bigger water heater for my walk-in tub?
Generally, your water heater capacity should be greater than that of the tub to ensure there is enough hot water to fill the tub. Manufacturers generally provide information about recommended water heater capacity based on the size of the tub.
How long does a walk-in tub take to drain?
A walk-in tub can take more than six minutes and up to 15 minutes to drain, though fast-draining models offer draining times as short as two minutes.
Are walk-in tubs good for seniors?
Walk-in tubs have safety features such as low-threshold entry and reduced fall risks, allowing seniors to bathe independently. These tubs are especially good for older adults who prefer to age at home.
Do walk-in tubs take a lot of water?
Yes, walk-in tubs require more water than standard bathtubs due to their larger size and capacity. While a standard tub holds 25 to 45 gallons of water, a walk-in tub can hold 40 to 80 gallons, depending on the model and size. But, the amount of water used depends on how frequently the tub is filled.
Bottom Line
Walk-in tubs provide safety, comfort, and therapeutic benefits. They are ideal for seniors, people with disabilities, or those needing assistance with bathing. Features like slip-resistant, wheelchair access, and compliance with Americans with Disabilities Act (ADA) standards ensure safety and ease of use. With a capacity ranging from 40 to 80 gallons, and a maximum of up to 100 gallons, the exact size depends on whether you’re using a soaker, combination, whirlpool, or bariatric tub.
Although they use more water and have longer fill/drain times, walk-in tubs offer accessibility, hydrotherapy, and support for chronic illnesses, enhancing the bathing experience.
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