Ella's Bubbles Walk In Tub Blog

Support Center / Walk-In Tub Models / What Are the Acrylic Shell and Stainless Steel Frame on a Walk-In Tub?

What Are the Acrylic Shell and Stainless Steel Frame on a Walk-In Tub?

The acrylic shell and stainless steel frame are the two pieces that make up every current Ella walk-in tub. The shell is a vacuum-formed acrylic and ABS sheet reinforced with gel-coated fiberglass, and it is bonded to a rust-proof stainless steel frame with adjustable leveling legs. Together they are what people mean when they ask what an Ella tub is made of, whether it is acrylic or fiberglass, or how sturdy the base is.

How It Works

A sheet of acrylic and ABS is heated and drawn over a mold under vacuum, which gives the tub its seat, floor and deck in one piece. The white runs all the way through the sheet, so it resists fading far better than a sprayed finish, and the surface is gloss white and non-porous, which resists mold, mildew and staining. Fiberglass with gel coat is applied to the back of the shell for stiffness. The team describes the acrylic as roughly 1/8 to 3/16 inch thick with the fiberglass backing behind it.

The stainless steel frame carries the load. It bonds to the shell and stands on adjustable leveling legs that transfer the weight of the tub, the water and the bather straight to the floor. Because the frame does the structural work, Ella sets no fixed bather weight limit; whether the bather fits comfortably on the seat and through the door matters more than weight, as weight limits and bariatric options explains.

Underside view of an Ella walk-in tub showing the hydrotherapy pump system, PVC piping and stainless steel frame
Under the shell: the pump, its piping and the stainless steel frame that carries the load to the leveling legs.

Which Ella Models Have It

Every current Ella walk-in tub uses this construction, so there is no model to single out. Every tub is white, and the warranty page notes that the white acrylic tone may vary slightly. Hardware finishes are where the choices live; see tub colors and hardware finishes. For the full construction story, read acrylic construction and frame.

What to Know as an Owner

Lift the tub only by the frame, never by the plumbing or the panels, and remove the access panels before carrying it. Level it so every leg touches the floor with equal weight; an unlevel frame can warp the shell and pull the door out of alignment. For daily care, use non-abrasive cleaners only. Scratches and dull spots come out with a fine-grade automotive polish, and stubborn construction debris responds to denatured alcohol or a soft scrub; acrylic surface care and touch-up has the routine. If the surface looks pink, yellow or stained, tub looks pink, yellow or stained covers the usual causes.

If you contact support at ellasbubbles.com/support about the shell or frame, have your serial number, clear photos of the area in good light, and a note on whether the mark is on the surface or appears to be under it.

Common Questions

Are Ella tubs acrylic or fiberglass?
Both, in layers. The bathing surface is vacuum-formed acrylic and ABS with the white running through the sheet, and gel-coated fiberglass is applied behind it for reinforcement.
Is there a weight limit on an Ella walk-in tub?
Ella sets no fixed bather weight limit. The stainless steel frame transfers load to the floor, so the practical questions are seat width and door opening rather than a number on a scale.
How thick is the acrylic on an Ella tub?
The team describes it as roughly 1/8 to 3/16 inch of acrylic with a gel-coated fiberglass backing that adds stiffness.
How do I remove a scratch from the acrylic?
Use a fine-grade automotive polishing compound on a soft cloth and work gently. Never use abrasive cleaners or pads, which dull the surface.
Can the frame rust?
No. The frame is rust-proof stainless steel, and its adjustable leveling legs let the installer level the tub on an imperfect floor.

Did this solve it?

If not, open a ticket and our team will pick it up from here.

Open a Support Ticket