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Therapy System Schematics Index: Every Published Component Diagram, Which Models It Lists, and How Many Dedicated Lines It Shows

Updated September 2026

This page indexes every therapy system component diagram (the one-page "schematics") Ella's Bubbles publishes for its walk-in tubs: the 21 schematic PDFs linked from product pages, the Air + Hydro component diagram in the specifications folder, and ten more diagrams in the same schematics folder. For each you will find the package printed, the models or door families listed, how many dedicated lines it shows, and its revision date.

What a Therapy Schematic Is and How to Read the Legend

A therapy schematic is a single-page component diagram for one therapy package: the boxes that make it work (pumps, control box, in-line water heater, ozone generator, heater pads, keypads) and the arrows between them. Every diagram uses the same layout:

  1. An outlet block printing one, two or three outlets, each "Wall Outlet, GFCI Protected, Dedicated Line, 20 AMP, 120 Volts" (one diagram prints 15 AMP).
  2. An "Available With:" or "Available On:" list of models or door families; a few diagrams print none.
  3. The drawing, with "Electrical 110V" tags on powered items and the air pump rated "110-120 V, 4.5 A" where present.
  4. A numbered legend naming each component and its parts.
  5. A footer with the revision date and the disclaimer quoted at the end of this page.

Naming the numbered legend component that is not behaving tells the team at (800) 480-6850 which box you mean.

How to Find Yours: Match Your Package, Then Your Model

Start with the therapy package on your order paperwork, not the model name; the same tub appears on several diagrams because it can be ordered with several packages. Then check that your model or door family is printed in the "Available With" list; if not, confirm the right diagram with your Ella dealer or the team at (800) 480-6850 before electrical planning. Spec sheets are listed on the manuals and spec sheets page; package availability by model is on the therapy package combinations page.

Table: Diagram, Package, Models Printed, Outlets Printed, Revision Date

Model names are as printed; "XXL" is the TransferXXL. Every outlet is GFCI protected, dedicated, 120 Volts.

Diagram filePackage printedModels or families printedOutlets printedRevision date
hydromassagepdf_compressed.pdf (2023/03)Hydro Therapeutic MassageStainless Steel, Outward Door, Lay-Down1 (20 AMP)01-16-26
hydrotherapy-massage-system-schematics.pdf (2021/10)Hydro Therapeutic MassageNo list printed1 (20 AMP)10-16-23
air-massage-system.pdf (2021/11)Air Therapeutic MassageLay-Down (title)1 (20 AMP)10-16-23
Micro_Lay-down.pdfMicro Bubble Therapy System (Optional Feature)Lay-Down (by file name)1 (20 AMP)7-13-23
specifications/air-hydro.pdfAir + Hydro Therapeutic MassageStainless Steel, Outward Door1 (20 AMP)01-16-26
air-hydro-front-entry.pdfAir + Hydro Therapeutic MassageFront Entry1 (20 AMP)02-05-26
hydro-heat.pdfSoaking + Heated Seat & BackNo list printed1 (15 AMP)05-06-24
airhydro-hydro.pdfAir + Hydro + Hydro Foot Therapeutic MassageRoyal, Monaco, Elite, Capri, Shak, Transfer60, Transfer 32, XXL2 (20 AMP each)01-08-26
air-hydro-hydro-digital.pdfAir + Hydro + Hydro Foot, Digital ControllerCompanion, Escape, Tub4two, Big4two, Shak, Big4one, Transfer60, XXL2 (20 AMP each)10-16-23
air-hydro-hydrofoot-microbubble-therapy.pdfAir + Hydro + Hydro Foot + Microbubble TherapyTransfer60, XXL, Ultimate2 (20 AMP each)01-08-26
air-hydro-hydro-heat.pdfAir + Hydro + Hydro Foot + Heated Seat & BackStainless Steel, Outward Door2 (20 AMP each)01-16-26
air-hydro-hydro-micro-digital-heat.pdfAir + Hydro + Hydro Foot + Micro + Heated Seat & Back, DigitalTransfer60, XXL, Ultimate2 (20 AMP each)01-21-26
air-hydro-hydro-micro-heat.pdfAir + Hydro + Hydro Foot + Micro + Heated Seat & Back (push control)Transfer60, XXL, Ultimate2 (20 AMP each)08-01-26
Air+Hydro+Micro.pdfAir + Hydro Therapeutic Massage + Microbubble TherapyStainless Steel, Outward Door2 (20 AMP each)01-16-26
hydro-microbubble-front-entry.pdfHydro Therapeutic Massage + Microbubble TherapyFront Entry2 (20 AMP each)02-04-26
hydromicrobubblepdf_compressed.pdf (2023/03)Hydro Therapeutic Massage + Microbubble TherapyStainless Steel, Outward Door2 (20 AMP each)01-16-26
Hydro-Independent-Hydro-Foot-Massage-System-Schematics_compressed.pdf (2023/03)Hydro + Hydro Foot Therapeutic MassageMonaco, Royal, Transfer 32, Transfer 60, XXL2 (20 AMP each)01-16-26
Air-Hydro-Hydro-Foot-Micro-Heated-Seat-compressed.pdf (2024/02)Air + Hydro + Hydro Foot + Micro + Heated Seat & BackTransfer60, XXL, Ultimate2 (20 AMP each)08-01-26
Air-Hydro-Independent-Foot-Massage-System.pdf (2024/06)Air + Hydro + Hydro Foot Therapeutic MassageRoyal, Monaco, Elite, Capri, Shak, Transfer60, Transfer 32, XXL2 (20 AMP each)01-08-26
Air-Hydro-Independent-Foot-Massage-System-Schematics.pdf (2021/10)Air + Hydro + Hydro Foot Therapeutic MassageSame list; last entry printed "XXXL" (misprint)2 (20 AMP each)01-08-26
air-hydro-hydro-micro-digital.pdfAir + Hydro + Hydro Foot + Microbubble Therapy, Digital ControllerShak, Big4One3 (20 AMP each)01-08-26
Air-Hydro-Hydro-Foot-Micro-Heated-Seat-Digital-Controller-compressed.pdf (2024/02)2 Seats: Air + Hydro + Hydro Foot + Micro + Heated Seat & Back, DigitalCompanion, Escape, Tub4two, Big4two3 (20 AMP each)01-16-26

Only two diagrams print three outlets: the Shak and Big4One digital microbubble package and the two-seat full package. Only the soaking plus heated seat diagram prints 15 AMP, because it has no pumps. For what outlet counts mean on site, see the electrical requirements page.

Duplicate Uploads That Carry the Same Diagram

Duplicates:

  1. Hydro Therapeutic Massage: the 2021/10 upload (10-16-23, no model list) and the 2023/03 upload (01-16-26) show the same system; cite the newer one.
  2. Air + Hydro + Hydro Foot: the 2021/10 and 2024/06 uploads both carry revision 01-08-26 and the same content. The 2021 copy prints "XXXL" as the last model; the 2024 copy prints "XXL". There is no XXXL model; both mean the TransferXXL. Cite the 2024/06 file.
  3. Air + Hydro + Hydro Foot + Microbubble + Heated Seat & Back (push control): air-hydro-hydro-micro-heat.pdf and the 2024/02 compressed upload, both revision 08-01-26 with the same model list and legend.
  4. Air + Hydro + Hydro Foot with Digital Controller: air-hydro-hydro-digital.pdf and air-hydro-hydro-digital-heat.pdf both print revision 10-16-23, the same eight models and the same seven components. Despite its name, the second file shows no heated seat components.

Additional Diagrams in the Schematics Folder

Nine more diagrams in /wp-content/uploads/walk-in-tub/schematics/ use the same layout:

Diagram filePackage printedModels or families printedOutlets printedRevision date
air-hydro-digital.pdfAir + Hydro Therapeutic Massage, Digital ControllerElla Lounger, Stainless Steel, Outward Door1 (20 AMP)01-16-26
air-hydro-digital-heat.pdfAir + Hydro + Heated Seat & Back, Digital ControllerElla Lounger, Stainless Steel, Outward Door1 (20 AMP)01-16-26
air-hydro-heat.pdfAir + Hydro + Heated Seat & Back (push control)No list printed1 (20 AMP)10-16-23
hydro-stand-flow.pdfHydro Therapeutic MassageElla Standard, Ella Flow1 (20 AMP)10-16-23
hydro-Heat-stand-flow.pdfHydro Therapeutic Massage + Heated Seat & Back + OzoneElla Standard, Ella Flow, Ella Zen1 (20 AMP)12-23-25
Hydro+Hydro+Micro.pdfHydro + Hydro Foot Therapeutic Massage + Microbubble Therapy + OzoneMonaco, Royal, Transfer 32, Transfer 60, XXL2 (20 AMP each)01-16-26
lay-down-air-heat.pdfAir Therapeutic Massage + Heated Seat & BackLayDown1 (20 AMP)12-30-25
lay-down-hydro-heat.pdfHydro Therapeutic Massage + Heated Seat & BackElla Standard, Ella Flow, Ella Zen1 (20 AMP)01-16-26
lay-down-micro-heat.pdfMicrobubble Therapy + Heated Seat & BackStainless Steel, Outward Door1 (20 AMP)01-16-26

Two file names do not match their contents: lay-down-hydro-heat.pdf lists the Standard, Flow and Zen, and lay-down-micro-heat.pdf lists the Stainless Steel and Outward Door families. Go by the printed list. After installation, these boxes are the ones described on the cords and control boxes page.

The Disclaimer Every Diagram Prints

Every schematic closes with "Please View Specifications for Electrical Amperage (A), Voltage (V) and Wattage (W)". The diagram shows how many dedicated lines the package uses and what feeds what; the amperage and wattage of each pump and heater are on the model's spec sheet, the document for your electrician.

Download the official document: Air + Hydro Therapeutic Massage Component Diagram

Common Questions

Why do some diagrams show two or three wall outlets?
Each outlet block is a separate GFCI protected, dedicated 20 AMP, 120 Volt line. The Shak and Big4One digital microbubble package and the full two-seat package print three; most other multi-system packages print two; single-system packages print one.
Does any schematic call for a 15 AMP line?
Yes, only one schematic calls for a 15 AMP line. The hydro-heat.pdf diagram, which is for the Soaking plus Heated Seat & Back therapy package, specifies a 15 AMP, 120 Volt dedicated line. This particular configuration does not include any pumps, which is why it requires a lower amperage.
Is the XXXL model listed on my older schematic a different tub?
No, the "XXXL" model listed on your older schematic is not a different tub. It is a misprint for the TransferXXL model. For example, the 2021 copy of the Air + Hydro + Hydro Foot diagram incorrectly prints "XXXL," while the 2024 copy of the same diagram correctly prints "XXL." Both diagrams refer to the TransferXXL tub, and the drawing content remains identical.

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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