Where was it made? Reading the country-of-origin mark on a tub or shower kit

By the Aging Safely Baths team. Published October 22, 2026. Laws and rulings checked October 22, 2026.

Our other guides explain the American side of the label. This one covers the other side: the "Made in" mark that imported tubs, shower pans and parts must carry, what that mark does and does not tell you, and how to check it before a tub is installed and the carton goes to the curb.

What does the law require on an imported tub or shower?

The rule comes from section 304 of the Tariff Act of 1930, codified at 19 U.S.C. 1304. Unless an exception applies, every article of foreign origin must be marked "in a conspicuous place as legibly, indelibly, and permanently as the nature of the article" allows, so that the "ultimate purchaser in the United States" can see the English name of the country of origin. U.S. Customs and Border Protection (CBP) enforces it through 19 CFR Part 134.

The regulations go further on what "conspicuous" means. The mark must survive normal distribution and handling, and "the ultimate purchaser in the United States must be able to find the marking easily and read it without strain" (19 CFR 134.41). CBP suggests that the best marks are worked into the article when it is made, such as molded in or etched.

The law has teeth. An article that reaches the market unmarked owes an extra duty of 10 percent of its value (19 U.S.C. 1304(i)). Removing or covering a required mark with intent to conceal it can bring a fine of up to $100,000 and up to a year in prison for a first offense, and up to $250,000 for later offenses (19 U.S.C. 1304(l)).

Who counts as the "ultimate purchaser"?

This is the key idea, and it explains why some parts of a tub carry no foreign mark at all. CBP defines the ultimate purchaser as "generally the last person in the United States who will receive the article in the form in which it was imported" (19 CFR 134.1(d)).

• A finished imported tub or shower kit that arrives ready to install usually reaches you in the form in which it was imported. The mark is meant for you, so it should be on the product or its container.
• An imported part that a U.S. factory turns into something new, such as a pump built into a tub, can make the factory the ultimate purchaser. If the factory's work is a "substantial transformation," the part no longer needs to tell you where it came from.
• A minor process that leaves the imported item's identity intact does not change anything. In that case the consumer who gets the item afterwards is still the ultimate purchaser (19 CFR 134.1(d)(2)).

This is why a tub built in an American plant can contain imported pumps, valves or door seals with no foreign marks on them, and still be marked or sold honestly, as long as any U.S. claim matches the facts.

What counts as a "substantial transformation"?

CBP's test is whether an article "emerges from a process with a new name, character, or use different from that possessed by the article prior to processing." A recent bathroom example shows how strict that can be. In ruling N347088 (April 23, 2025), CBP looked at shower trim kits whose handles were die-cast and machined in one country, then coated and polished in a second country and packed with parts made there. CBP found that the coating and polishing were not "complex and meaningful," so the handles kept the origin of the country where they were cast.

The lesson for a buyer: final packing, polishing or putting parts in a box in one country does not make that country the origin. The FTC takes a similar line on U.S. claims: it says a simple "screwdriver" assembly usually does not qualify for an "Assembled in USA" claim.

How do customs marks and "Made in USA" claims fit together?

Two different agencies govern two sides of the same label. CBP decides foreign-origin marking for imports. The Federal Trade Commission decides whether a U.S.-origin claim is truthful. The FTC says plainly that a customs decision "doesn't necessarily mean it's permissible to promote that product as Made in USA" (FTC, Complying with the Made in USA Standard).

One more point from the FTC rule: the "Made in USA" standard applies to online listings and mail-order catalogs as well as physical labels (16 CFR 323.3). A web page that calls a tub American-made is held to the same standard as the sticker on the shell.

Check the wording you found

Pick the phrase closest to what you see on the tub, the carton, the spec sheet or the website. You will get a plain-English reading and the question to ask next. Nothing is sent anywhere.

The wording I found Choose a phrase "Made in USA" / "Built in USA" / "Manufactured in USA" "Assembled in USA" "Made in USA of U.S. and imported parts" "Designed in USA" / "Engineered in USA" "Made in [another country]" / "Product of [country]" "Distributed by" or "Imported by" a U.S. company A U.S. flag or map, with no words No origin wording anywhere

Where I saw it On the tub or shower itself On the shipping carton On a website, brochure or quote

Choose a phrase to see what it means.

How has customs treated walk-in tubs?

CBP rulings show how customs sees these products. They do not say where any brand is made, but they show that imported walk-in tubs exist and how they are classified.

Two cautions. First, both rulings say duty rates are "subject to change," and trade rules have changed many times since, so do not read today's tariff into them. Second, a duty classification is about what a product is, not where it was made. A duty-free tub still has to tell you its country of origin unless a specific exception applies.

Where should you look for the mark?

1. The product Look for a molded, etched or printed mark, a sticker or a data plate anywhere on the shell or pan, including spots you will not see once it is installed. CBP prefers marks worked in at manufacture, so check before installation day.
2. The carton Check every box before it is thrown away. For some items the container can carry the mark. Take a photo of the label.
3. The spec sheet and warranty Many makers name the plant on the spec sheet or warranty card. Keep both with your receipt.
4. The listing and the quote Origin claims on a website or in a quote are covered by the same FTC standard as the label. Save a screenshot of the page you bought from.
5. Ask in writing If you still cannot tell, ask the seller to write down where the shell, door, pumps and faucet are made. Our dealer question checklist has the wording.

What should you ask about each part?

A walk-in tub is a shell, a door and seal, a frame, a drain, valves and a faucet, and often pumps, a blower and an inline heater. A shower package is a pan, walls and usually a valve, seat, hand shower and grab bars. Ask about the parts that matter most to you:

• Where is the shell or pan molded, and by whom?
• Where are the door, the seal and the hinge made? These are the parts most likely to need service.
• Where are the pumps, blower and heater made, and are spare parts stocked in the U.S.?
• Is the faucet or valve a standard U.S. plumbing part that any local plumber can replace?
• If the seller says "Made in USA," which parts, if any, are imported?

The answers do not have to be "all American" to be good answers. A clear, written answer is the sign of a seller you can trust. For walk-in tubs, compare them with the statements on our manufacturer list. For showers, see our guide to American-made roll-in showers.

Common questions

Do imported walk-in tubs have to say where they were made?

Yes, unless an exception applies. 19 U.S.C. 1304 requires every article of foreign origin to be marked conspicuously, legibly, indelibly and permanently with the English name of its country of origin, so the ultimate purchaser in the U.S. can see it. Sometimes the container carries the mark instead.

Can an American-made tub contain imported parts?

Yes. When a U.S. factory substantially transforms an imported part, the factory is treated as the ultimate purchaser, so the part does not need a foreign mark. An unqualified "Made in USA" claim still requires all or virtually all of the tub to be made and sourced in the U.S.

Is "Assembled in USA" a warning sign?

No. It is an honest claim when the principal assembly in the U.S. is substantial. It tells you the factory work happened here, but the parts may come from elsewhere, so ask about the parts you care about.

Does a duty-free walk-in tub have to be marked with its origin?

A duty classification decides how much duty is owed, not where a product was made. In ruling N243682, CBP gave an imported walk-in tub a duty-free secondary classification for articles designed for people with disabilities. The country-of-origin marking law is a separate requirement.

Who do I contact if a tub's origin label seems false?

Ask the seller for a written explanation first. False U.S.-origin claims can be reported to the Federal Trade Commission. Questions about foreign-origin marking on imports belong to U.S. Customs and Border Protection.