Are cheap bidet attachments certified?

In our search of IAPMO R&T's listing for ASME A112.4.2 / CSA B45.16 on 20 October 2026, we did not locate the popular low-cost attachments we checked (LUXE NEO 120, 185 and 320, TUSHY Classic, Brondell SimpleSpa, Bio Bidet attachments, Omigo). One low-cost attachment is listed: the Glacier Bay T3204-30 (file 11670). Not found means we could not verify an independent listing; other testing or certification is not ruled out, and it does not mean unsafe.

What is the cheapest certified bidet?

The cheapest model we found on IAPMO R&T's listing (file 11670, ASME A112.4.2-2021 / CSA B45.16-2021) was the Glacier Bay T3204-30 non-electric bidet attachment, $20.72 at Home Depot on 20 October 2026. The cheapest listed bidet seat we found was the Bio Bidet BB-300, $79 on the maker's site.

What does ASME A112.4.2 certification mean for a bidet?

ASME A112.4.2 / CSA B45.16 is the plumbing standard for bidets and other personal hygiene devices, including protection against backflow into drinking-water pipes. Certified models appear by model number on a certifier's public listing, such as IAPMO R&T's, and may carry the cUPC mark. 'Tested to' wording without a listing is a manufacturer claim.

The Bidet Math

Do Your Own Math › The Bidet Math › Certified bidets

Which bidets are actually certified?

Product pages use words like "certified", "tested to" and "meets", and they do not mean the same thing. We looked the models up in IAPMO R&T's plumbing listing on 20 October 2026. This is what we found, and what we did not find.

We did not find the $40 attachments most people buy on the listing — not the LUXE NEO, not the TUSHY Classic, not the attachments from Brondell or Bio Bidet. Other testing or certification is not ruled out.
A listed attachment costs less than those: the Glacier Bay T3204-30 was $20.72 at Home Depot on 20 October 2026. Several bidet seats from Brondell and Bio Bidet are listed too, from $79.
Not found does not mean unsafe. It means we could not find an independent listing to check, so what you have is the maker's own documentation.

What "certified" means for a bidet

A bidet sprays water close to the body and is connected to the pipe that feeds your taps. If the water pressure in the street drops, water can be pulled backwards into that pipe. That is called backflow. The 2024 International Plumbing Code (section 408.2) says a bidet's water supply must be protected against it.

The plumbing standard for bidets is ASME A112.4.2 / CSA B45.16 ("water closet personal hygiene devices"). It includes backflow protection. A certifier such as IAPMO R&T tests the exact model and puts it on a public listing; the product may then carry the cUPC mark. Electric seats also need an electrical safety listing (UL 1431).

"Tested to ASME A112.4.2" on a box or in a manual is not the same thing. It can mean only some sections were tested, by the maker itself. A certification names a certifier, a model and a listing you can look up.

Listed — confirmed on IAPMO's directory

All of these appear by model number on an active IAPMO R&T listing to ASME A112.4.2-2021 / CSA B45.16-2021. Many bidets are made by a factory and sold under a brand name; the brand then appears under "Additional company information" on the factory's listing. That is normal.

Checked on pld.iapmo.org on 20 October 2026. "File" is IAPMO's listing number. Prices are from the maker or the store named, on 20 October 2026, where we checked one.
Type	Product · listed models	Price	IAPMO file
Non-electric attachment	Glacier Bay Slim non-electric bidet attachment · T3204-30	$20.72 (Home Depot)	11670
Non-electric seat	Glacier Bay Slim non-electric bidet seat · BP0657 (elongated), BP0658 (round)	$99.77 (Home Depot, BP0657)	11670
Non-electric seat	Bio Bidet BB-300 (also BB-325E, BB-350E, BB-375E, HD-300E)	$79 (elongated)	11670
Non-electric seat	Brondell Swash CL150 (EW and RW versions)	$129.99	11670
Electric seat	Brondell Swash · SE400, SE600, CL510, CL950, DS725, IS707	—	11913
Electric seat	Brondell Swash · SE800, CL2800, IS55, CL250, EB210, S210	—	10807, 11670
Electric seat	Bio Bidet · BB-2000, BB-1700	—	7155
Electric seat	Bio Bidet · BB850E, BB900E; Bemis HV5000E, HD-6000, CR2000, HD-6500, CR2500 bidet seats	—	10807, 12518
Electric seat	Alpha Bidet · UX (UXA-EW, UX-EW, UX-RW, UX-T), iX Pure (iX-Pure-RW)	—	10008
Seat	Gerber · Essential (GC590001WH) and Advanced (GC590000WH) elongated bidet seats	—	11670

Model letters matter: "EW" is elongated white, "RW" round white. Check that the model number on the product page matches the listing.

Two popular ones we could not confirm here

TOTO Washlet C5 (model SW3084) — IAPMO's electrical directory lists it by name to UL 1431 (file E10023, checked 7 August 2026), and TOTO's manual documents a vacuum breaker and a check valve. TOTO's spec sheet also states cUPC, but we did not find the plumbing listing in IAPMO's directory on 20 October 2026.
Moen 2-Series EB500 — Moen states it is certified by Intertek to ASME A112.4.2 / CSA B45.16, and its install guide shows a check valve and a vacuum breaker. Intertek's directory would not open for us, so we have not confirmed the listing ourselves.

Not found on the listing

We searched IAPMO's directory by brand and model on 20 October 2026. We did not locate these; a listing under another name, or certification or testing elsewhere, is not ruled out:

LUXE Bidet NEO 120, NEO 185, NEO 320 — not located under the brand. For the NEO 185 and NEO 120, the manual we read lists sections of ASME A112.4.2 the product was tested to, without naming a certifier; the manual we read does not describe a backflow device.
TUSHY Classic — not located. The only TUSHY entry we found is an integrated smart toilet (model "EAU"), not an attachment.
Brondell SimpleSpa attachments and Bio Bidet's attachments (such as the SlimEdge) — not located. The seats above are.
Omigo — not located under the brand.

We found no recalls for any of these. Not found means we could not verify the backflow protection from a listing, not that it is missing; the maker's own documentation may describe it. If your local code requires it and the product does not document it, the protection has to come from your plumbing — ask a plumber before you install.

Check any bidet yourself in two minutes

Find the exact model number on the box or product page.
Search the brand on IAPMO R&T's product listing directory. Open each "Water Closet Personal Hygiene Devices" listing and look for your model, including under "Additional company information".
Check the standard: ASME A112.4.2 / CSA B45.16. For an electric seat, also look for a UL 1431 listing.
Only "tested to" or "meets" wording, and no listing? Then it is a claim, not a certification.

Which bidets are actually certified?

What "certified" means for a bidet

Listed — confirmed on IAPMO's directory

Two popular ones we could not confirm here

Not found on the listing

Check any bidet yourself in two minutes

Is a bidet worth it for you?

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