Does the Ella Flow Need a 15 Amp or 20 Amp GFCI Outlet?

The Ella Flow is specified for one dedicated 110/120 volt, 60 Hz electrical line with a 15 amp GFCI standard three-prong outlet, and it is the only Ella walk-in tub with that requirement; the spec sheet itself notes that most other Ella tubs specify 20 amp. The published documents print the requirement but not a reason for it, so the practical answer for your electrician is to run one dedicated 15 amp GFCI circuit to the equipment compartment under the seat, following the placement rules in Where to Put the Outlet: Seat-Side Placement, Cord Reach, the 20 Amp Receptacle, GFCI Under the Tub, and the Three Foot Rule. If your order adds the heated seat and backrest, or your electrician would rather plan around a 20 amp receptacle, confirm the line with your Ella dealer or the team at (800) 480-6850 before the rough-in.

What the Flow Spec Sheet Actually Prints

The Flow spec sheet, dated 6/16/23, describes a 28 inch by 48 inch by 36.5 inch acrylic tub with an inward swing S-shape door, the smallest tub in the Ella lineup. Its electrical section reads differently from every other sheet in the set, and these are the figures it prints:

• One dedicated 110/120V 60Hz electrical line with a 15 amp GFCI standard three-prong outlet.
• Hydro massage system: a hydro massage pump rated 8.1 amp and 900 watts, an in-line water heater rated 6 amp and 650 watts, 16 jets, a push control, and an intensity dial that is an air control.
• Optional heated seat and backrest, listed at 4 amp.
• Net weight 210 pounds, shipping weight 310 pounds, 65 gallons unoccupied and 30 to 50 gallons occupied.

That is the whole electrical story as published. The sheet does not explain why the Flow is set at 15 amp while the other tubs are set at 20, it does not say whether the optional heated seat shares the single line, and it does not say whether a 20 amp receptacle is an acceptable substitute. This page does not guess at any of those, which is why the heated seat and the 20 amp question both go to the team before the wall is closed. The Flow product video on this page says the same thing in one line: the tub is powered by a single dedicated protected GFCI connection.

Where the Flow Sits in the Lineup

The table below puts the Flow next to the other published outlet requirements so your electrician can see what is different about it. Every figure comes from the Flow spec sheet, the outlet placement guide, or the Shak and Big4One schematic.

The pattern is that the line count follows the equipment stack. In its standard hydro configuration the Flow carries one hydro pump and one in-line heater, so it needs one line, and the published rating for that line is 15 amp. Add a second pump for foot massage or microbubbles on another model and the sheet calls for a second 20 amp line; stack two hydro pumps, an air pump and the rest on a Shak or Big4One and the diagram explained in What the Shak and Big4One Digital Schematic Shows spreads the loads across three. For a Flow owner the consequence is simple: one circuit and one receptacle, with no second outlet to find room for.

Which Component Diagram Matches Your Flow

Ella publishes two component diagrams for the hydro package the Flow shares with the Standard and Zen, and both are read in detail in What the Standard, Flow and Zen Hydro Schematics Show. The plain hydro diagram, hydro-stand-flow.pdf with revision 10-16-23, prints "Available With: Ella Standard, Ella Flow" and lists just two components: the hydro massage system, made up of the hydro pump, the air flow intensity control and the on/off control, and the in-line water heater control box. The pump and the heater each carry an "Electrical 110V" tag, and the intensity dial is connected by an air hose, so it is an air control rather than an electrical one. No ozone generator appears on that diagram.

The second diagram, hydro-Heat-stand-flow.pdf with revision 12-23-25, keeps the same hydro loop and adds four components: the ozone generator, the surface heater box, the surface heater pads and the surface keypad. It prints "Available With: Ella Standard, Ella Flow, Ella Zen". If your order shows Hydro Massage with no heated seat option, use the first diagram; if it shows the Heated Seat and Backrest option, use the second. Every diagram in the published set opens with an outlet block, and the Therapy System Schematics Index notes that one diagram in the set prints 15 AMP where the others print 20 AMP, so read the outlet block on the diagram you download rather than assuming the figure. Handing the right PDF to your licensed electrician before delivery is the simplest way to avoid a second visit.

What Your Electrician Needs to Know

The rules that apply to every Ella tub apply to the Flow, with the 15 amp rating as the one change:

• Plug-in, never hardwired. The tub runs on ordinary 120 volt household power, and there is no 240 volt wiring.
• Dedicated. The line cannot share a circuit with any other appliance.
• GFCI protected. Many installers put the GFCI at the tub outlet itself so it can be reset without pulling the tub apart.
• Placement. The best place for the outlet is inside or directly behind the equipment compartment under the seat, so the factory cord reaches without an extension.
• Clearance. Keep other appliances at least 3 feet away and leave the compartment uninsulated.

Receptacle shape matters as much as the rating. A 15 amp receptacle has two vertical slots. A 20 amp receptacle has a T-shaped slot that accepts either blade orientation, which is why a standard household plug fits both. If any cord on your tub ends in a plug with one blade turned sideways, that is a 20 amp T-blade plug designed for a 20 amp receptacle only, and T-Shaped Plug Does Not Fit the Outlet explains the fix and the adapter support has pointed customers to. The Flow sheet calls for a standard three-prong outlet, so the receptacle it describes is the ordinary household one.

A Short Checklist Before the Tub Arrives

1. Download the Flow spec sheet and the component diagram that matches your package, and hand both to your licensed electrician.
2. Confirm the therapy package on your order paperwork: hydro only, or hydro with the heated seat and backrest.
3. Have the electrician run one dedicated 15 amp GFCI line to the equipment compartment location under the seat, or raise the 20 amp question with your Ella dealer or the team at (800) 480-6850 first.
4. Keep other appliances 3 feet away from the tub and leave the compartment uninsulated.
5. After delivery, plug in and test. If a plug will not fit the receptacle, stop and read the T-blade article before buying anything.

Watch: The Ella Flow: Best Compact Walk-In Tub for Seniors | Ella’s Bubbles with chapters and a full transcript.

Related Guides

• Electrical requirements by model: dedicated GFCI circuits for your walk-in tub
• Does a Walk-In Tub Heated Seat Need Its Own Circuit, and Can It Be 15 Amp?

Common Questions