The Ella Big4Two is the largest tub in Ella's two-seat family: an acrylic walk-in bathtub with two facing seats, an outward-swinging door, and hydro massage, air massage, foot and calf massage and LED chromatherapy included. Its actual size is 36 inches by 80 inches by 40 inches, and with Ella's glass screens, dual rain shower heads or dual hand showers it also works as a place to shower. For footage of the tub alongside its siblings, see Two-Seat Tubs on Video: Big4Two, Escape, Tub4Two and Companion Walkthroughs.
Size, Seats, Weight and Water Capacity
These figures come from the current Big4Two spec sheet, which describes the tub as the large two-seat acrylic outward swing door model.
- Actual size: 36 inches wide by 80 inches long by 40 inches tall.
- Seat widths: 22 inches and 24 inches, two molded seats facing each other.
- Water capacity: 145 gallons unoccupied, 85 to 135 gallons occupied.
- Weight: 328 pounds net, 531 pounds shipping.
- Shipping size: 38 inches by 82 inches by 50 inches.
Ella's product video introduces the Big4Two as the largest two-seat walk-in tub available on the market, with the largest interior soaking space of any two-seat tub in the industry. It is a true two-seater, which means two independent bathing spaces rather than one extra-large seat. The video also points out that the tub has plenty of room for two bathers, or you can enjoy it all by yourself. The shell is gloss white acrylic, fiberglass gelcoat reinforced, on a stainless steel frame with adjustable leveling legs, and like all Ella walk-in tubs it has a low threshold for easy entry and a textured floor for added safety.
How the Big4Two Compares with Ella's Other Two-Seat Tubs
Ella builds four two-seat walk-in tubs. The table uses only published figures, and where a figure is not published in the material behind this page, the cell says so.
| Model | Actual size | Seat widths | Water capacity | Door | Best for |
|---|---|---|---|---|---|
| Big4Two | 36 inches wide by 80 inches long by 40 inches tall | 22 inches and 24 inches | 145 gallons unoccupied, 85 to 135 gallons occupied | Outward-swing plastic composite and tempered glass door with 3-latch gear and shaft mechanism | The longest two-seater, for bathrooms with the wall length and the floor space for an outward door |
| Escape | 36 inches wide by 72 inches long by 40 inches tall | 27 inches and 29 inches | 145 gallons unoccupied, 85 to 135 gallons occupied | Inward-swing brushed stainless steel door with frosted tempered glass | The roomiest seats for two, where floor space in front of the tub is tight |
| Companion | 32 inches wide by 60 inches long by 40 inches tall | 23 inches and 25 inches | 100 gallons unoccupied, 45 to 70 gallons occupied | Inward-swing removable brushed stainless steel door | Medium to petite bathers and a standard 60 inch tub alcove |
| Tub4Two | not listed | 20 inches and 22 inches | not listed | Outward-swing U-shape door with 3-latch gear and shaft mechanism | Two bathers who prefer an outward door on a two-seater other than the 80 inch Big4Two |
What the differences mean for you: the Big4Two is the longest of the family at 80 inches, so it will not drop into a standard 60 inch alcove the way the Companion does, and its outward door swings into the room, so plan clear floor space in front of it. It shares its 145 gallon unoccupied capacity with the Escape, while the Escape has the wider seats and an inward door. If you are weighing seat width against overall length, compare your own seated measurements with the drawings, and read how big a two-person walk-in tub is for what a tub this size asks of a bathroom. For the alcove-size alternative, the Companion overview covers the 60 inch model.
The Door and the Drains
The Big4Two door is a plastic composite and tempered glass outward swing door with a 3-latch gear and shaft mechanism. In the product video, Ella explains that the doors close securely with this unique three latch mechanism, which ensures a leak-proof, tight closure.
Draining is handled by two 2 inch 4-port PVC drains with 2 end caps included, 2 overflows, and 2 stainless steel operated openers with extended handles in a chrome finish. The spec sheet calls the arrangement the Ella 2 inch T-type Dual Port Floor Drain: two independent floor drains with four 2 inch ports that install in either direction, and the house drain can connect to either or both ports. The video describes this as Ella's dual drain technology, two 2 inch drains with adjustable height for fast, efficient draining.
The spec sheet also lists a removable front apron with two access panels, one reversible end panel, and a stainless steel chrome finish wall-mounted grab bar.
Therapy Systems That Come Included, and the Options
- Hydro massage for the seat jets. A 9A, 1250W hydro massage pump feeds 16 upper seat jets, 8 on each seat, with an intensity dial air control, run from the digital controller.
- Hydro massage for the foot and calf jets. A separate 7A, 1000W pump drives 4 foot and 4 calf jets on its own on/off push control, with a 6A, 800W in-line water heater and 0.04A ozone sterilization. The video notes you can sit in comfort and enjoy the foot and calf hydro jets when all you need is a foot massage.
- Air massage. A 4.5A, 500W three-speed pump feeds 18 seat jets, 9 on each seat, plus 4 foot jets, run from the digital controller. Auto Purge activates 20 minutes after the pump is turned off and runs for 120 seconds to blow residual water out of the air lines.
- LED chromatherapy light. A multicolor 0.5A LED light bulb with a transformer, run from the digital control pad.
Two options are listed: the MicroBubble Therapy System, with a 1 HP, 7.3A pump, pressure vessel, agitator valve and on/off push control, and a heated seat and backrest. For electrical planning, the spec sheet requires dedicated GFCI protected electrical lines for the 115V 60Hz equipment, with all fixtures on a dedicated GFCI outlet or GFCI breaker.
To see where each jet, the digital push control and the hydro intensity dial sit on the tub, the two-seat brochure callout diagram uses the Big4Two as its illustration. And for which therapies each bather runs on their own, see how therapy controls are split between the two seats.
Showering in the Big4Two, and the Faucet
People often search for the Big4Two as a walk-in shower, and Ella's accessories video shows why. The exclusive options for this tub are:
- A four-fold glass screen that can be combined with a three-fold glass screen to create a bright and airy alternative to a shower curtain. The product video adds that the four-fold screen can be set up to fit on both sides of the tub.
- Dual rain shower heads that provide a soft rain shower for both ends of the tub, allowing one bather to stand while the other sits safely.
- Dual extendable multi-function hand showers.
The spec sheet lists the Two-Piece Fast Fill Faucet for this tub: up to 16 GPM at 60 PSI with ideal in-home plumbing, a 40mm high-flow cartridge, two 5 foot water supply lines with 3/4 inch connectors, and a pull-out chrome hand shower on a 5 foot retractable stainless steel braided hose. The hand shower is limited to 1.9 GPM. The brochure lists the Ella 5-piece or 2-piece fast-fill faucet in chrome, and the product video notes you can choose the fast fill 5-piece faucet set with extendable multi-function shower head or use a faucet set of your own choosing. Your Ella dealer or the team at (800) 480-6850 can confirm the faucet and shower accessories that suit your bathroom.


Watch: Big4Two: 2 Person Walk-In Tub Accessories For Couples | Ella's Bubbles with chapters and a full transcript.
Related Guides
- Choosing a Two-Seat Walk-In Tub: Companion, Escape, Tub4Two, and Big4Two Compared
- Your Two-Seat Tub Owner's Manual, Section by Section (Tub4Two, Companion, Escape, Big4Two)
- What the Two-Seat Full Package Schematic Shows: Two Foot Pumps, Two HSB Boxes and Three Dedicated Lines (Companion, Escape, Tub4Two, Big4Two)
Related Videos

