Can I use a 220V smart toilet in the US with a plug adapter?

No. A plug adapter only changes the plug shape; it does not change the voltage. A smart toilet built for 220–240 V will not run correctly on a North American 120 V circuit, and a transformer is not a realistic or safe solution for a toilet. Order the 110–120 V variant for North America.

Is 110V the same as 120V?

In practice, "110V" and "120V" both refer to the North American nominal 120 V supply. The standard defines an acceptable range around 120 V for 60 Hz systems, so a unit rated 110–120 V is designed for that supply.

How do I know which voltage variant I am buying?

Voltage is specified at the variant level. Name the exact model and configuration, state the destination, and require the quotation to list voltage, frequency and plug. A spec sheet that does not state voltage is incomplete.

Does one certificate cover both 110V and 220V versions of a model?

Not automatically. Certification is tied to the exact model and variant. Check the certificate's covered model/variant list to confirm it includes the voltage variant you are ordering before you treat it as certified.

110V vs 220V Smart Toilets: Wiring Facts for US Importers

If you are buying smart toilets for the US or Canadian market, the first spec to lock down is not the seat or the flush — it is the voltage. North American homes supply 120 V at 60 Hz, while many export markets run 220–240 V at 50 Hz. Order the wrong electrical variant and the unit will not run, or it can be damaged at first power-up. This guide covers the voltage facts, the plug and frequency checks, and the exact questions to put into an RFQ.

The short answer: match the destination, not the model name

The same smart toilet model can be built for different electrical markets. In North America the residential standard is a 120 V, 60 Hz supply delivered through a three-prong grounded outlet (NEMA 5-15, plug type B). In most of Europe, Asia, Australia and New Zealand the supply is 220–240 V, commonly at 50 Hz. A unit built for 220–240 V will not operate correctly on a North American 120 V circuit, and a 120 V unit connected to a 220–240 V circuit can be damaged.

United States mains voltage and plug types: worldstandards.eu — USA
Nominal voltage ratings for 60 Hz systems: ANSI C84.1-2020 (NEMA)

Why a smart toilet is an electrical appliance, not just ceramic

A smart toilet is a ceramic fixture plus an electrical appliance: heated seat, warm-water wash, warm-air dryer, deodoriser, automatic lid, sensors and a remote. These systems are designed around a specific input voltage. That is why voltage appears as a variant on the spec sheet — and why it should be confirmed before a container leaves the factory.

The two electrical worlds

Region	Nominal supply	Frequency	Typical plug
United States / Canada	120 V (range ~110–126 V)	60 Hz	NEMA 5-15, three-prong grounded
Most other export markets	220–240 V	50 Hz (some 60 Hz)	Varies by country

The 220–240 V / 50 Hz configuration is the common build for bidet and smart-toilet units sold outside North America. Brondell — International Purchasing & Shipping Policy

What happens with the wrong voltage

A 220–240 V unit on a 120 V circuit does not receive enough power. Functions such as the seat heater and warm-water wash may run weak or not at all.
A 120 V unit on a 220–240 V circuit is overdriven and can be damaged. Do not test it "to see if it works."
Frequency also matters. Some electronics accept both 50 Hz and 60 Hz; others are tuned for one. Confirm frequency as well as voltage.

Voltage is a variant-level spec, so name the exact model

In the OTOL catalog, each smart-toilet model such as the T1 smart toilet and the T6 smart toilet is configured at the variant level: configuration and electrical variant are separate options. A buyer who writes only "smart toilet" in an RFQ leaves the most important electrical decision open. Name the exact model, configuration and destination, and the quotation should state the voltage, frequency and plug for that variant.

Certifications follow the exact variant

Electrical-safety and plumbing certifications are granted to a specific model and voltage variant, with a defined scope. A certificate for one variant or market does not automatically cover another voltage. For the US and Canada, the marks importers typically ask about are cUPC for the plumbing side and ETL/UL for electrical safety — but coverage must be verified against the exact model, variant and certificate scope. Ask for the certificate number, holder, validity, and the covered model/variant list, and check that the list includes the voltage variant you are ordering. If the supplier cannot show that scope, treat the coverage as unverified.

RFQ checklist for a voltage-matched smart toilet

Destination country and expected outlet (example: US, 120 V / 60 Hz, NEMA 5-15).
Exact model and configuration you want.
Electrical variant for that destination: voltage, frequency and plug.
Certification scope for that exact variant: number, holder, validity, covered model/variant list.
Power connection style: plug-in or hard-wired, and any local code requirement such as a GFCI-protected receptacle in the bathroom.
Sample voltage verification: if you order samples, confirm they are the same variant as the production order.

How OTOL confirms voltage before production

For every order, OTOL matches the product to the destination and confirms the exact electrical variant — voltage, frequency and plug — in the written quotation before production. If the exact model, variant or destination has an open compliance question, it is raised before the order is confirmed, not discovered in the container. That is the evidence-first check we run for every market.

Need a smart toilet matched to your market's voltage? Send your destination and quantity — Nicole will confirm the exact variant, plug and document scope before quotation. See the full smart toilet range or browse the product catalog.