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Support Center / Door & Seal / What Is an S-Shape Inward-Swing Door on a Walk-In Tub?

What Is an S-Shape Inward-Swing Door on a Walk-In Tub?

The S-shape inward-swing door is the acrylic door on Ella's Standard, Standard60, Zen, Zen60 and Flow walk-in tubs. It is also called the inward acrylic door or simply the S-shape door, and its handle sits inside the tub. You step in through the opening, stay standing, and swing the door closed toward you before you sit down. Because it opens into the tub, it needs no floor clearance in front of the tub, which is a big part of why this platform suits smaller bathrooms.

Ella's Bubbles walk-in tub door options guide showing U-shape, S-shape, and L-shape inward and outward swing door styles
The S-shape inward-swing acrylic door as shown on Ella's door options guide, alongside the outward-swing styles.

How It Works

The acrylic door swings inward on its hinges. Once you close it and lock the interior handle, the seal is pressed against the frame, and as the tub fills the weight of the water pushes the door even more firmly into that seal. That is why an inward door holds shut so well, and it is also why the door will not open until the tub has completely drained. Closing the door from a seated position is much harder than closing it while standing, so the habit to build is simple: enter, close and lock the door while standing, then sit. The full routine is in how to open and close the inward-swing acrylic door.

Which Ella Models Have It

The S-shape acrylic door is fitted to the Standard and Standard60, the Zen and Zen60 and the Flow. The Zen and Zen60 use exactly the same S-shape door platform as the Standard; the U-shape wording on their spec sheets is a misprint. The Ultra is a little different: its inward door is brushed aluminum with frosted tempered glass rather than acrylic, and the Ultra brochure also calls it an S-shape door. If you are not sure which style you own, which door does my tub have lists every model by door type.

What to Know as an Owner

Never force the door open while there is water in the tub, and never lean on the door or put your weight on it, since the door and seal warranty is valid only when the alignment is correct and has not been changed by a bather's weight. Clean the seal with rubbing alcohol, check it now and then for grit or soap film that could keep it from seating, and leave the door open when the tub is not in use. If the door rubs the frame or water appears at the seal, check that every leveling leg is touching the floor, because a tub that is not level can warp the frame and throw the door out of alignment. For a ticket at ellasbubbles.com/support or (800) 480-6850, have your model name, your order details from where you purchased, and photos of the door edge and seal where the trouble shows. If you are still deciding between door styles, inward or outward swing door compares the two.

Common Questions

Is the Zen door a U-shape or an S-shape door?
The Zen and Zen60 use the same S-shape inward-swing acrylic door as the Standard. The U-shape wording on their spec sheets is a misprint, and the Zen owner manual matches the Standard manual.
Why will my inward-swing door not open after my bath?
Inward doors are held shut by the water pressure inside the tub, so the door stays closed by design until the tub has completely drained. Wait for the water to finish draining and the handle will release normally.
Should I close the S-shape door before or after I sit down?
Close and lock it while you are still standing. Closing it from a seated position is much harder, and standing gives you a full, easy reach on the interior handle.
Does an inward-swing door need clearance in front of the tub?
No. The door swings into the tub, so nothing needs to be kept clear on the bathroom floor. That makes the S-shape door platform a good fit for compact bathrooms and tight alcoves.

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