How Do Walk-in Tubs Work?

Walk-in tubs are designed to make bathing safer and more comfortable, especially for older adults or anyone with limited mobility. Unlike traditional bathtubs, these models have low entry thresholds, built-in seats, and sealed doors that let you step in without climbing over a high wall.

Once inside, the tub fills like any other bath, with extra features like safety bars, fast-drain systems, and hydrotherapy jets. In this guide, we’ll break down exactly how walk-in tubs work, what to expect during use, and how to decide if one is right for you.

What Is a Walk-In Tub?

A walk-in tub is a specially designed bathtub that features a low step-in threshold and a watertight door so you can walk directly into the tub instead of stepping over a high wall. Inside, you’ll typically find a built-in seat, handrails, anti-slip flooring, and easy-to-reach controls, making support safe, independent bathing.

Walk-in tubs are especially popular among older adults, people with mobility issues, or anyone recovering from surgery or joint pain. While they offer clear comfort and safety features, they come at a higher cost than standard tubs. 

Prices vary depending on features like hydrotherapy jets, heated seats, and quick-drain technology. For a full breakdown of pricing and options, visit our walk-in tub cost guide.

How Does a Walk-In Tub Work?

Walk-in tubs are designed to simplify and secure the bathing experience. Here’s a walkthrough of the bathing process in a walk-in tub.

Step 1: Entering the Tub

Most walk-in tubs have a low threshold between 2 to 7 inches, allowing you to step in with minimal effort. 

Instead of climbing over a tall tub wall, you simply open the swinging door, which may open inward or outward depending on the model, and walk inside. Many models are wheelchair accessible and include grab bars and anti-slip flooring for extra stability while seated.

Step 2: Sealing and Filling

Once you’re seated, you can lock the door manually, or it will seal automatically depending on the design. These watertight seals are built to prevent leaks, even after years of use. 

With the door closed, the tub begins to fill, typically holding 40 to 80 gallons of water. Fill times vary by faucet strength and water pressure, but usually take 5 to 10 minutes. Higher-end models may include a rapid-fill faucet and a heated seat to keep you comfortable while you wait.

Step 3: Bathing Comfortably and Safely

Inside the tub, you’ll find a built-in seat so you can bathe in an upright, supported position. Temperature controls, anti-scald features, and easy-to-reach fixtures help you stay safe throughout your soak. Many walk-in tubs also offer therapeutic features like hydrotherapy jets, air massage systems, and aromatherapy to ease joint pain, improve circulation, and create a spa-like experience at home.

Step 4: Draining and Exiting

When you’re ready to finish your bath, you activate the drain lever or button to begin emptying the tub. Advanced models feature fast-drain systems that can remove water in as little as 2 to 4 minutes. 

For your safety, the door will remain locked until the tub is fully drained, helping prevent spills or falls. Once the water is gone, the door unlocks, and you can exit slowly, using the grab bars for extra balance. Regular cleaning and maintenance can also help keep the drain and other components working smoothly over time.

Types of Walk-In Tubs

Walk-in tubs come in several styles to meet different mobility needs, comfort preferences, and bathroom sizes. Here are the most common types:

Soaker Tubs

These are the most basic walk-in tubs, designed for safe entry and seated bathing. They don’t include jets or advanced features but offer a deep, relaxing soak in a secure environment.

Hydrotherapy Tubs

Equipped with water jets, hydrotherapy tubs are ideal for people with arthritis, joint pain, or muscle stiffness. The jets provide a gentle massage that promotes circulation and eases soreness.

Air Jet Tubs

Instead of water, these tubs release streams of warm air through tiny jets. Air tubs are especially good for people with sensitive skin or circulation issues.

Bariatric Tubs

Made with wider frames and reinforced seats, bariatric walk-in tubs support higher weight capacities. They provide extra space and stability for larger users.

Wheelchair-Accessible Tubs

These feature an outward-swinging door and a low, wide entry point to allow for easy lateral transfers from a wheelchair. They typically include hand-held shower wands and built-in grab bars for added support.

Combination Tubs

Combination tubs include both air and water jets, giving users the flexibility to choose between a soft bubble bath or a more targeted massage. They’re a great choice for those who want a full spa experience.

Key Walk-in Tub Features to Look For

When choosing a walk-in tub, you want one that keeps you safe, comfortable, and in control. Look for features that support easy entry, simple operation, and therapeutic benefits that match your needs:

• Low step-in threshold (2–7 inches)
• Built-in seat for upright bathing
• Anti-slip flooring
• Grab bars and handrails
• Fast-drain system
• Easy-to-use door handle and controls
• Heated backrest/seat
• Water heater to regulate hot water temperature
• Hydrotherapy or air jets
• Hand-held shower wand or showerheads
• ADA-compliant design for accessibility

The best walk-in tubs include many of these features and back them with strong warranties and customizable options. Here’s how three top brands compare on key features, tub types, and cost:

Brand	Key Features	Tub Type(s)	Average Cost Range
Safe Step	Heated seat, hand-held shower wand, towel bar, ADA compliant, joint pain relief	Soaker, Whirlpool, Combination	$10,000+
Kohler	Low threshold, customizable finishes, strong warranty	Whirlpool	$2,000 – $20,000
American Standard	Wheelchair-friendly, massage options, lifetime warranty (including labor)	Soaker, Air, Whirlpool, Wheelchair-accessible, Combo	$4,987 – $14,497

Frequently Asked Questions

Help us improve our guides! If you’ve recently installed a walk-in tub or have insights on how yours works, we’d love to hear from you. Share your experience with us at [email protected]. Your personal details will stay completely confidential.