Which Walk-In Tubs Have Anti-Scald Valves and Temperature Controls?

No Ella walk-in tub model includes an anti-scald valve by default. The anti-scald device on an Ella tub is the Thermostatic Control Valve, or TCV, and it arrives with the Ella thermostatic faucet package rather than with a particular model, so two tubs of the same model can differ depending on the faucet chosen at order time. Ella offers the deck-mounted TCV on most of its acrylic walk-in tub line, and the Elite, Petite, Royal, Deluxe and Companion are named among the models it is offered on, as The Thermostatic Control Valve (Anti-Scald): Which Faucets Have It, Its Setting, and Water-Heater Advice explains.

Temperature Control by Faucet Configuration

Because the faucet is the deciding factor, the useful comparison is between faucet configurations rather than between tub models. The table lists the Ella configurations named in the support articles and what each one does about water temperature.

The practical difference is who holds the temperature steady. With the thermostatic package, the valve does: if the cold supply drops it limits the hot flow, and if the hot supply drops it limits the cold, so a flushed toilet or a fluctuating water heater does not send a spike to the spout. With any other configuration the bather does, by setting the levers or valves before filling and testing the water with a hand or a thermometer before entering. That matters more in a walk-in tub than in a shower, because the door stays closed until the tub drains and you cannot step out of the way, which is why Anti-Scald and Thermostatic Valve Standards for Walk-In Tubs treats scald protection as a safety question rather than a comfort one.

How to Tell Whether Your Tub Has a TCV

1. Look on the deck for a separate temperature handle with its own governor beside the faucet. If it is there, you have a TCV.
2. Check your order confirmation, which shows the faucet package the tub was built with.
3. If you are still unsure, open a ticket at ellasbubbles.com/support with your model and serial number.

Two faucets are easy to rule out on sight. The dual-lever 5-piece fast-fill set has a red handle for hot, a blue handle for cold and a middle lever that diverts water to the hand shower. The 2-piece fast-fill set has a single lever that swings left for hot and right for cold, with a diverter button under the spout. Neither is thermostatic, and on either one the maximum temperature is simply whatever you set by hand.

What the Valve Does and Where It Is Set

The TCV leaves the factory set at 100.4 F, the temperature Ella's owner manuals name as the point above which bathing water may be harmful, so the factory setting is the safe bathing ceiling. The handle turns down freely for a cooler bath. Inside the handle is a spring-loaded locking pin that rests against a locking collar, and that pin is the anti-scald mechanism: turning toward warmer water requires pushing the button, and the button springs back into place when the handle reaches the 100.4 F setting. Raising the maximum above the factory position is an internal adjustment in which the set screw cover comes off, the set screw is loosened with an Allen wrench and the handle is reseated a quarter turn counterclockwise on the brass fitting. The first video on this page shows that sequence on the valve itself. Ella's published guidance is that the valve can be adjusted downward and that turning it above the factory setting is not recommended. The full procedure is in How Do I Adjust the Maximum Temperature on a Walk-In Tub Thermostatic Valve?.

The valve carries a 1-year limited warranty, and cartridge fouling from calcium, iron or other heavy particles in the water is not covered, so protect it with an inline filter or mesh on the supply lines and have it cleaned periodically. If a tub with a TCV runs hotter than its setting, the usual cause is a fouled cartridge, and Why Is the Water in My Walk-In Tub Too Hot? walks through what to check in order.

Holding the Bath Warm Is a Different Feature

Shoppers sometimes read the in-line water heater as a temperature control, and in one sense it is, but it is not scald protection. The second video on this page explains it: when you fill the tub with the 5-piece or 2-piece fast-fill faucet you set a comfortable temperature yourself, and when you engage the hydro massage the in-line heater, working with the water pump, maintains that temperature so you stay warm. The heater keeps the water you already chose from cooling. It does not limit how hot the incoming water can be, which is the TCV's job.

What a Plumbing Inspector May Ask About

Inspectors most often mention ASSE 1016, which covers automatic compensating valves for individual showers and tub-shower combinations; ASSE 1070, which covers water temperature limiting devices at a single fixture such as a bathtub; and ASSE 1017, which covers temperature-actuated mixing valves at the water heater. The Consumer Product Safety Commission recommends a 120 F water heater setting to reduce tap-water scald risk, and model plumbing codes such as the International Plumbing Code limit the hot water supplied to bathtubs and whirlpool bathtubs to 120 F through a device conforming to ASSE 1070. Your state and local plumbing inspector decide which code and edition applies. If you need documentation on the valve for an inspector, send a photo of the faucet and valve and your order details to your Ella dealer or the team at (800) 480-6850.

Watch: Ella's Bubbles: In-line Water Heater Maintains Comfortable Water Temperature with chapters and a full transcript.

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