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How long does it take to fill a walk-in tub?

Updated September 2026

▶Glossary6
  1. What Decides How Long the Fill Takes
  2. Hot Water Matters as Much as the Faucet
  3. Models That Fill Differently
  4. Related Guides
  5. Related Videos
  6. Common Questions

Ella walk-in tubs fill after you are seated, so the time depends on how many gallons your model holds with a bather in it and on how quickly your home delivers hot water. The Ella faucet is capable of a fill rate of about 16 gallons per minute, and at that rate a tub with a capacity of around 60 gallons fills quickly rather than leaving you waiting before you can begin bathing, as Drainage and Fill Time explains. Draining is quicker still, because the two 2-inch gravity drains typically empty the tub in two minutes or less.

What Decides How Long the Fill Takes

Two numbers set the wait: the gallons you need and the flow your plumbing can deliver.

  • Occupied capacity. You displace water, so the figure that matters is the occupied one. Most standard-size Ella walk-in tubs hold 65 to 107 gallons unoccupied, and you will typically use 30 to 75 gallons per bath once you are seated. The largest models, the ShaK, Escape and Big4Two, hold up to 145 gallons unoccupied. Every model's figures are in How many gallons does each Ella walk-in tub hold? Water capacity guide.
  • Faucet flow. The Ella faucet delivers about 16 gallons per minute, and both Ella fast-fill faucet sets include two 5 foot braided supply lines.
  • Your home's plumbing. House water pressure, pipe size, the distance from the water heater to the tub, and hot water being used elsewhere at the same time all change the real-world rate. Three quarter inch supply lines with accessible shut-off valves are recommended.

Hot Water Matters as Much as the Faucet

A fast faucet only helps if the water stays warm for the whole fill. The general guidance from the team is that the average walk-in tub usually calls for a 75 gallon or larger water heater, and the recommendation is the maximum capacity heater available for your house. The largest tubs, such as the ShaK and Big4Two, may require a dedicated additional heater. If you have a tankless heater, it should be rated at 11 GPM or more. Have your contractor assess the whole picture, including pressure and pipe runs, before installation day.

Models That Fill Differently

The HomeCare Transfer Bathtub is the exception to the faucet rule. Its 80 gallon internal tank pre-heats water while the bather is being prepared, so the tub fills in about 90 seconds after the bather is seated, drains in about 150 seconds, and the tank refills in about 11 minutes for the next bath. It is built for caregiver-supervised bathing only. At the other end of the line, the LayDown60 is never sold with a factory faucet, so its fill rate depends on the customer-supplied faucet your plumber installs. The LayDown guide covers the faucet rule for each LayDown size.

Chapters in this video
  1. 0:00 Hot Water Heater Capacity The video explains the recommended hot water heater capacity for an optimal walk-in tub bathing experience.
  2. 0:37 Finding Tub Water Capacity The video shows how to find the water capacity of Ella's Bubbles walk-in tubs on the website.
  3. 1:04 Dedicated Hot Water Supply The video suggests considering a dedicated hot water supply system for your walk-in tub.
  4. 1:16 Supply Lines And Faucet Sets The video recommends 3/4 inch supply lines and mentions included supply lines with Ella's Fast Fill faucet sets.

Common Questions

How fast does the Ella faucet fill a walk-in tub?
The faucet on an Ella tub is capable of a fill rate of about 16 gallons per minute. At that rate a tub with a capacity of around 60 gallons fills quickly rather than requiring a long wait. Your actual rate depends on your home's water pressure and pipe size.
Does a bigger walk-in tub take longer to fill?
Yes, because the fill rate is set by the faucet and your plumbing, more gallons means more time. Standard-size Ella tubs typically use 30 to 75 gallons per bath once you are seated, while the largest models hold up to 145 gallons unoccupied. Check the occupied figure for your model in the water capacity guide.
Why does my walk-in tub fill slower than expected?
House water pressure, pipe size, the distance from the heater to the tub, and simultaneous hot water use elsewhere in the home all reduce the flow at the faucet. Three quarter inch supply lines with accessible shut-off valves are recommended. Ask your contractor to assess the full supply picture.
How long does a walk-in tub take to drain?
Every Ella tub uses two 2-inch gravity-driven drains rather than a pump. When connected to a proper 2-inch drain line, the tub typically empties in two minutes or less. Draining speed depends on that connection being correct.
Do I need a bigger water heater for a walk-in tub?
The average walk-in tub usually calls for a 75 gallon or larger water heater, and the team recommends the maximum capacity heater available for your house. Tankless heaters should be rated at 11 GPM or more. The largest tubs may need a dedicated additional heater.
Is there a walk-in tub that fills in seconds?
The HomeCare Transfer Bathtub pre-heats water in an 80 gallon internal tank and moves it into the tub in about 90 seconds once the bather is seated. It is designed for caregiver-supervised bathing only, never for self-bathing. The tank then refills in about 11 minutes for the next bath.

Related guides

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