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What Features Should I Look for in a Walk-In Tub for Aging in Place?

Updated October 2026

Look for a low threshold the bather can clear comfortably, a chair-height seat that is wider than their seated hips, a door that swings the right way for the room, grab bars, a textured floor, and drains and a faucet that are easy to work while seated. Therapy and comfort features come after those basics, not before them. That order of decisions is laid out in How Do I Choose a Walk-In Tub for Aging in Place?, and this page turns it into a feature-by-feature checklist with the published figures to compare.

The Safety Basics Every Walk-In Tub Should Have

A conventional bathtub asks the bather to lift a leg over the rim, lower down to the floor of the tub, and later stand up from that floor on a slippery surface. The features worth looking for first are the ones that remove each of those moves. Every Ella walk-in tub is built around the same four safety basics:

  • A low threshold door. The bather steps in near floor level instead of climbing over a tub wall.
  • A built-in seat. Bathing happens seated behind a sealed door instead of standing on a wet surface.
  • Grab bars. The Ella S-Class 30x52 and 30x60, for example, have wall and deck grab bars and a built-in towel rack.
  • A textured floor. It gives the feet grip during the step in, the turn and the sit.

Two more details belong on the same list. A chrome stainless steel door latch pulls the door tight against its seal, and oversized easy-turn drain openers with a large 2 inch drain and a safety chain let the tub empty without the bather bending for a small stopper. The acrylic surface is durable and easy to clean, which matters when the person cleaning the tub is also the person bathing in it. The reasoning behind each of these basics is covered in Are Walk-In Tubs a Good Choice for Seniors and Aging in Place?

Seat Width, Seat Height and Soaking Depth

The seat is the feature that has to fit one particular person, so measure the bather before you compare tubs. Have them sit in a chair facing a wall, in a relaxed position, and take three measurements: hip width while seated, shoulder width while seated, and length from head to feet while seated. The tub seat must be wider than the hip figure, the shoulder figure tells you whether the tub has proper shoulder room, and the seated length gauges the tub length that fits.

Across the Ella lineup, seat width runs from 19 inches on the Petite and Transfer26 to 29 inches on the TransferXXL, so the hip measurement narrows the field quickly. Seat height is 17 inches on most models, similar to a standard chair, so sitting down and standing up use the same motion as rising from a dining chair. Soaking depth is set by the interior length, the seat length and the depth from the top of the seat to the overflow drains. That seat-to-overflow figure runs roughly 15 to 18 inches across the mid-size models, and the Ultra, for example, gives 17 1/2 inches. A tall bather with a long torso sits higher in the water than a shorter bather on the same seat.

Bigger is not automatically better. The long-seat models, the Big4One and the ShaK, suit a bather around six feet or taller, and those long seats can be uncomfortable for an average or shorter person. Weight has no single published limit across the lineup, because every shell sits on a rustproof stainless steel frame that carries the load to the floor. The full measuring method is in How do I choose the best walk-in tub for a senior?

The Feature Checklist, with Published Figures

FeaturePublished figures to compareWhat to check for your bather and bathroom
ThresholdMobile 26x45 lists a step-in of about 3 3/4 inches. The S-Class is offered with a 3 inch threshold height in place of the 6 inch height.The bather must clear it comfortably. The 3 inch S-Class version requires subfloor access to the drains.
Seat width19 inches on the Petite and Transfer26, 21 inches on the S-Class, 23 inches on the Royal 32x52, 29 inches on the TransferXXL.The seat must be wider than the seated hip measurement.
Seat height17 inches on most models.Similar to a standard chair, so standing up feels familiar.
Soaking depthRoughly 15 to 18 inches from seat to overflow on mid-size models. Ultra 17 1/2 inches.A long torso sits higher in the water on the same seat.
Door swingInward-swing doors need no floor space in front of the tub. The Mobile outward U-door has a 165 degree swing and a 19 1/4 inch opening.Leave clear floor in front of an outward door. Doors are not interchangeable between models.
Drains2 inch drain with easy-turn opener and safety chain. Dual 2 inch drains on the Royal 32x52.The bather should be able to open the drains from the seat without bending.
Exterior widthPetite: listed as 28 inches, actual 27 1/2 inches. Elite: actual 30 inches.Compare the actual size on the spec sheet with every doorway and hallway on the route.

What these differences mean in practice: the threshold and the seat decide whether the bather can use the tub safely every day, the door swing decides whether the tub works in the room, and the exterior width decides whether the tub can reach the bathroom at all. A tub that will not pass through the house cannot be installed, so measure every doorway and hallway and work from the actual dimensions on the spec sheet, not the nominal size. The door side matters too. The door and the drains sit on opposite sides of an Ella tub, so facing the tub, a right-side door puts the drains on the left and a left-side door puts them on the right. The Front Entry 32x40 is the exception to choosing a side, because its outward U-shape door sits on the 32 inch end of the tub and the bather walks straight in from the front.

Faucet, Hand Shower and Temperature Control

The faucet is a feature many shoppers overlook. The second video on this page explains that Ella tubs come with a range of faucet options, including a two-piece high-flow faucet, a five-piece high-flow faucet and a TCV faucet, and that each tub is drilled and fitted for the faucet and features selected when the order is placed. Tubs equipped with an Ella thermostatic faucet package include a built-in Thermostatic Control Valve that mixes hot and cold to a set temperature, which is a helpful feature for anyone who is sensitive to water temperature.

Every Ella tub with the 5-piece fast-fill faucet includes a pull-out hand shower, so the bather can rinse while seated. If the tub will also serve as the household shower, a slide bar, a rain shower column or a wall-mounted rain system can be added for showering on your feet, as described in Can a Walk-In Tub Be Part of an Aging-in-Place Shower Remodel?

Therapy Features, Installation and Support Come Last

The first video on this page sums up the order: consider mobility, comfort and safety, measure the bathroom, select features that enhance the bath such as hydrotherapy or heated seats, and make sure of professional installation and reliable support. Therapy features are a real pleasure, and they are also the easiest part of the decision once the fit is right.

Installation and support are features too. Ella's Bubbles builds the tub and provides free lifetime technical support, and a local licensed plumber or electrician does the installation work. Be honest about whether a tub is the right product at all. If the bather will use a wheelchair in the bathroom and prefers to shower, Ella also makes shower bases with a zero threshold that sit flush with the floor. For neutral help with that first decision, the agencies described in State Assistive Technology Programs and Area Agencies on Aging can compare bathing equipment with you and arrange a home assessment. Neither one sells tubs or is connected to Ella's Bubbles. Your Ella dealer or the team at (800) 480-6850 can then match a model to what you learn.

Video
Watch: How to Choose the Perfect Walk-In Tub | Ella’s Bubbles with chapters and a full transcript.
Video
Chapters in this video
  1. 0:00 Choosing Your Walk-In Tub Faucet We discuss the importance of selecting the right faucet for your Ella's Bubbles walk-in bathtub.
  2. 0:21 Customizing Your Bathtub Order We explain how each Ella's Bubbles bathtub is custom-drilled and installed with your selected faucet and features.
  3. 0:39 Competitor Faucet Limitations We highlight that other brands typically offer limited or no faucet options for their bathtubs.

Watch: Luxury Faucet Options for Your Walk-In Tub, Voted Best/Safest 2020 | Ella’s Bubbles with chapters and a full transcript.

Video
Chapters in this video
  1. 0:00 Considering Your Personal Needs The video discusses important factors to consider when choosing an Ella's Bubbles walk-in tub, including personal needs and mobility.
  2. 0:40 Measuring for Proper Tub Fit The video explains how to take shoulder, hip, and overall body measurements to ensure the walk-in tub fits properly.
  3. 2:26 Home Accommodation and Placement The video advises checking door widths and hallways to ensure the chosen tub will fit into the home and bathroom.
  4. 4:17 Ensuring Proper Water Supply The video recommends having a maximum capacity water heater and three-quarter inch supply lines for the walk-in tub.
  5. 4:47 Designing Your Walk-In Tub The video details how to choose jetting packages, including air, hydro, and MicroBubble therapy, and other innovative features.
  6. 6:15 Adding Optional Accessories The video showcases various accessories like heated seats, digital controls, headrests, and a four-fold glass screen.
Video
Chapters in this video
  1. 0:00 Choosing Your Perfect Walk-In Tub This chapter guides you through considering personal needs and body measurements to select the ideal Ella's Bubbles walk-in tub size.
  2. 2:45 Home Accommodation and Tub Placement This chapter explains how to measure your home's doorways and hallways to ensure your chosen Ella's Bubbles tub will fit and where it can be placed.
  3. 4:45 Ensuring Proper Water Supply This chapter details the recommended hot water heater capacity and supply line specifications for optimal Ella's Bubbles tub performance.
  4. 5:16 Designing Your Tub's Features This chapter covers customizing your Ella's Bubbles walk-in tub with various jetting packages, therapeutic options, and cleanliness features.
  5. 6:43 Adding Accessories and Luxury This chapter showcases additional accessories like heated seats, headrests, glass screens, and aromatherapy to enhance your Ella's Bubbles tub.

Common Questions

What are the most common safety features on a walk-in tub?
The common safety features are a low threshold door, a built-in seat, grab bars and a textured floor. Every Ella walk-in tub is built around those four basics. A chrome stainless steel door latch and easy-turn drain openers with a safety chain add to them.
How wide should the seat be on a walk-in tub?
The seat must be wider than the bather's hip width measured while seated in a relaxed position. Ella seat widths run from 19 inches on the Petite and Transfer26 to 29 inches on the TransferXXL. Compare the measurement with the drawings and specifications for each model.
Should I choose an inward or outward swinging door?
Inward-swing doors need no floor space in front of the tub, so they suit tighter bathrooms. Outward U-shape doors need clear floor in front of the tub, and the Mobile's door swings 165 degrees. Doors are not interchangeable, so the door style comes with the model you choose.
Does a walk-in tub come with a hand shower?
Every Ella tub with the 5-piece fast-fill faucet includes a pull-out hand shower for rinsing while seated. A slide bar, a rain shower column or a wall-mounted rain system can be added for a standing shower. The tub is drilled for the faucet selected when the order is placed.
Is there a weight limit on Ella walk-in tubs?
There is no single published weight limit across the lineup. Every shell sits on a rustproof stainless steel frame that carries the load to the floor. If the person can sit comfortably inside the tub, the tub holds them.
Should I pick therapy features before I measure my bathroom?
No, therapy features come last. Start with the bather's mobility, comfort and safety, then confirm the tub fits through the doorways and into the space, then settle the door side and swing. Features such as hydrotherapy or heated seats are chosen after those steps.

About this guide. Answers in the Ella’s Bubbles Support Center are compiled from real conversations with tub owners, our technicians’ notes and the product documentation, then reviewed by our team. Tub models and options have evolved over the years, so a detail here may differ slightly from your exact tub. If something looks different on yours, send us your serial number and a specialist will confirm it for your model.

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