Are Stainless Steel Walk-In Tub Doors Less Likely to Leak Than Acrylic Doors?

Not according to anything Ella's Bubbles publishes. Ella does not rank one door material as more or less leak-prone than another. What it describes is how each door seals, and in every case the seal comes from the way the door swings and latches rather than from whether the frame is brushed stainless steel, molded acrylic or plastic composite. The stainless steel door swings inward and is pressed into its seal by the weight of the bath water, while the outward-swing composite doors are pulled tight by a gear and shaft latch mechanism built to withstand that same water pressure, as Does the stainless steel walk-in tub door only open inward? explains. The practical choice between them is about floor space and how you enter the tub, not about which one holds water.

The Door Platforms Side by Side

Ella uses several door constructions, and each model belongs to exactly one of them. The table lists what each door is made of and what holds it shut, drawn from Ella's published door descriptions.

Read across the rows and the pattern is clear. The inward doors, whatever they are made of, use the bath water as part of the seal. The outward doors cannot, because the water pushes them toward the room, so they rely on a mechanical latch system instead, and Ella's door video describes that system as a unique mechanical locking system to prevent leaks. Material changes how the door looks, how it is cleaned and whether it lifts off for cleaning. It does not change which of these two sealing principles is at work. What the swing does change is floor space: the inward doors need none in front of the tub, the U-shape door needs about 21 inches of clearance and swings 165 degrees, and the L-shape door needs about 36.5 inches and swings 172 degrees, figures laid out in Do Walk-In Tub Doors Swing In or Out, and Is Outswing a Different Model?.

How the Stainless Steel Door Seals

The brushed stainless steel door is a U-shaped frame with a frosted tempered glass panel. You enter through the opening, stay standing, swing the door closed toward you and turn the interior chrome handle to lock. The handle pulls the door into its seal, and as the tub starts to fill, the water presses the door more firmly into place, so it stays shut on its own for the whole bath. The same pressure is why the door cannot be opened until the tub has fully drained, which is a safety feature rather than a fault. Closing from the seat is much harder than closing while standing, so close and latch the door before you sit down. The door also lifts off its hinges so you can clean the seal and the tub wall behind it, which is the advantage Ella's door video points to when it says hard-to-reach places have never been easier to access. Both the door and its frame are stainless steel.

How the Outward Composite Doors Seal

The U-shape outward door on the Capri, Monaco, Front Entry, Mobile, Lounger, Shak, Big4One, Tub4Two and Big4Two is made of a plastic composite frame with tempered glass. Ella's team describes the composite as a strong plastic with high impact resistance, and the door video describes it as high-impact, industrial-strength plastic designed to withstand tremendous water pressure. Because the water pushes the door toward the room, the door is closed by a gear and shaft mechanism that drives three latches, with the handle on the outside face. The L-shape door on the Transfer tubs uses two latches driven by the same gear and shaft mechanism. Ella's door video describes the gear and shaft as ensuring a safe and secure door seal. Every Ella tub door is hinged to the tub, sealed against the water, and pulled tight by its latch mechanism each time you close it, which is why tub doors swing rather than slide, as Which walk-in tub doors swing open instead of sliding? explains.

What the Material Does and Does Not Tell You

• Stainless steel means an inward door that is removable for cleaning and that uses water pressure as part of its seal. Every stainless door Ella makes swings inward, and there is no outward version.
• Plastic composite means an outward door with tempered glass and a 3-latch gear and shaft mechanism. These doors need clear floor in the arc of the door but leave more room inside the tub and are the easiest way in, especially from a wheelchair, because outward doors require no knee clearance.
• Molded acrylic means the S-shape inward door on the Standard platform, which also seals with the help of the water.
• The towel bar is brushed stainless steel finished to match the door on every model, so its finish is not a clue to the door type.

The materials of every part of the tub, including the acrylic shell and the stainless steel frame, are set out in What Are the Shell, Frame, Door and Towel Bar of an Ella Walk-In Tub Made Of?.

Paperwork That Says Stainless When the Door Is Not

Some of the confusion about which door leaks less comes from documents that describe the wrong door. The outward-swing family manual describes a stainless steel inward door in its entry section; that page is a carryover from the inward-swing manual, not a description of those tubs. The Tub4Two spec sheet lists a removable stainless steel door; that line was carried over from the Companion and Escape sheets, and the Tub4Two door swings outward with a frosted tempered glass panel in a white composite frame. The Zen and Zen60 spec sheets say U-shape; that is a misprint, and the Zen uses the same S-shape inward acrylic door as the Standard. If a manual or spec sheet disagrees with what you see, trust the tub. Open the door and see which way it travels, look at the material, and count the latches on an outward door: three on the U-shape door, two on the Transfer door.

What This Means for Your Bathroom

Choose the door by the room and the bather, not by a leak comparison that Ella does not publish. If there is no floor space to spare in front of the tub, or a toilet sits close, an inward door, stainless or acrylic, needs none. If the bather transfers from a wheelchair or wants the widest, easiest entry, the outward U-shape or L-shape door is built for it, provided the room has the 21 or 36.5 inches of clearance. Whichever you choose, close and latch the door fully before the tub fills, keep the seal clean, and know that the door you get is the one that comes with the model, since the two platforms are not interchangeable.

Watch: What Makes Ella’s Walk-In Tub Doors Unique, Voted Best Walk-In Tubs 2020 | Ella’s Bubbles with chapters and a full transcript.

Related Guides

• Using Your Stainless Steel Inward-Swing Door: Opening, Closing, and Handle Adjustment
• Caring for Your Door Seal: Cleaning, Reseating, and Replacing the Gasket
• Inward or Outward Swing Door: Which Should I Choose Before Ordering?

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