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What Is an Alcove Installation for a Walk-In Tub?

Updated September 2026

An alcove installation places a walk-in tub in the classic three-wall opening where a standard 60 inch bathtub used to sit. The tub is enclosed on the back and both ends, with only the front apron exposed. Every Ella tub fits an alcove, and most 52 and 55 inch models use an extension panel to fill the gap at one end so the finished installation looks built in.

Ella walk-in tub installed in a corner alcove with white marble-look wall surround panels
A three-wall alcove with a wall surround above the tub deck.

How It Works

Most bathrooms were framed around a 60 inch tub, so that is the opening you are usually filling. Tubs that are 60 inches or longer fill the space on their own; a 60 inch tub such as the Ultimate is actually 59.5 inches, which is why it needs no extension panel. Most shorter tubs fill the remaining space with an Ella extension panel that mounts at the end of the tub frame. The walls above the deck are then finished with tile or a surround over an aftermarket tile flange so water runs back into the tub.

Ella tubs are not limited to alcoves. The same models can stand against one or two walls with an end panel closing the exposed side, which Planning the bathroom layout explains.

Which Ella Models Have It

Every Ella model fits a three-wall alcove. Which ones ship with or offer an extension panel, and the panel width for each, is listed in Extension panels and filler kits by model. A few models, such as the Front Entry and Mobile, have no extension panel, so the installer frames and finishes any remaining space instead. Always plan around the actual size on the spec sheet rather than the nominal name, and read Will it fit my alcove? before framing.

What to Know as an Owner

Alcove placement limits service access, because the plumbing end of the tub is against a wall. Ask your installer to add a wall access panel behind the plumbing end so pumps and drain connections can be reached without disturbing tile. Planning service access covers what to leave reachable and why the space around the tub must never be packed with insulation.

A few accessory details change in an alcove. A shower column installed on a tub with an extension panel uses the long 4 to 5 inch pipe connector to reach the wall. The 4-fold glass screen converts to a 3-fold screen by removing one section, which is how it fits a 52 inch tub in a 60 inch alcove with an extension panel. Mention the alcove and the panel when you ask the team about either accessory.

If you open a ticket about fit, have the width of the opening measured wall to wall at the back and at the front, the model name, and the actual size from the spec sheet. That lets the team confirm the extension panel and screen configuration for your order.

Common Questions

Will a walk-in tub fit in my existing 60 inch bathtub alcove?
Yes, every Ella walk-in tub model fits a three-wall alcove, which is the classic three-wall opening where a standard 60 inch bathtub used to sit. Tubs that are 60 inches or longer, such as the Ultimate, fill the 60 inch opening on their own without an extension panel. Most shorter 52 and 55 inch Ella models fill the remaining space in a 60 inch alcove with an Ella extension panel that mounts at the end of the tub frame, so the finished installation looks built in.
Is a 60 inch Ella tub really 60 inches long?
No, a 60 inch Ella walk-in tub is not exactly 60 inches long. For example, the Ella Ultimate walk-in tub is actually 59.5 inches, which allows it to fit a 60 inch opening without needing an extension panel. Always plan your bathroom layout around the actual size listed on the spec sheet rather than the nominal name to ensure proper fit.
Does an alcove installation make the tub harder to service?
Yes, an alcove installation can make the walk-in tub harder to service because the plumbing end of the tub is against a wall. To maintain service access, ask your installer to add a wall access panel behind the plumbing end of the tub. This panel allows the pump, heater, and drain connections to be reached without disturbing finished tile or walls.
Can I still add a shower column or glass screen in an alcove?
Yes, you can still add a shower column or a glass screen in an alcove installation. If your Ella walk-in tub uses an extension panel, the shower column will require its long 4 to 5 inch pipe connector to reach the wall. The Ella 4-fold glass screen can be converted to a 3-fold screen by removing one section, which allows it to fit a 52 inch tub in a 60 inch alcove with an extension panel. When discussing these accessories with the Ella team, mention that your tub is in an alcove and uses an extension panel.

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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