Last updated 4 October 2026 — by Adrian Tan, SDM. Marketing guidance, not legal advice. The Water Efficiency Labelling Scheme is administered by PUB, Singapore’s National Water Agency; confirm product-specific requirements with PUB before a campaign goes live.
When Singapore’s energy-label advertising rule took effect on 1 July 2026, it caught a lot of appliance retailers by surprise. Fewer noticed that a similar duty has applied to a different set of products for years. If you sell taps, mixers, toilet cisterns, flush valves, urinals, household washing machines or household dishwashers in Singapore, your advertisements — online listings included — already have to show PUB’s Water Efficiency Label, and must not suggest the product is approved by the Government.
The duty sits in the Public Utilities (Water Supply) Regulations, under the Mandatory Water Efficiency Labelling Scheme, and its current wording dates from 1 January 2024. It reaches manufacturers, importers, retailers, bathroom showrooms, marketplace sellers and, in practice, the agencies that build their ads. This guide sets out which products are covered, exactly what each ad format must show, the claims you cannot make, and how to apply the rule to the channels SME retailers actually use.
Which products the rule covers
Since 1 January 2024, the Regulations use the term “water device” (reg 40A). It replaced the older term “specified water fitting” that appears in PUB’s 2021 guidebook. A water device is any of the following:
| Group | Water devices covered | Label display duty in ads? |
|---|---|---|
| Bathroom and kitchen fittings | Taps and mixers; flushing cisterns; urinal flush valves; water-closet flush valves; waterless urinals | Yes |
| Household appliances | Household clothes washing machines; household dishwashers | Yes |
| Commercial equipment | Commercial front- and top-load washer extractors; commercial hood and undercounter dishwashers | No (reg 40AB(2B)), but must be registered |
| Cleaning equipment | High-pressure washers, other than household, steam or hot-water and equipment- or vehicle-washing types | No (reg 40AB(2B)), but must be registered |
Two common assumptions are wrong. First, showerheads are not in the mandatory scheme; PUB lists them as voluntary only, so a showerhead ad does not need the label (although a voluntary label, if used, must be used properly). Second, washing machines and dishwashers are not on the National Environment Agency’s energy-label list covered in our guide to energy label advertising rules in Singapore. For those two appliances the water label is the one that governs your ads.
PUB’s ratings differ by product. Taps, cisterns, water-closet and urinal flush valves and waterless urinals are rated on two or three ticks; household clothes washing machines on two, three or four ticks. One-tick taps, cisterns and urinal flush valves have been banned from sale since 1 April 2019, and water-closet flush valves of 4.0 litres or less entered the mandatory scheme from 1 January 2022 with a two-tick minimum.
“Advertise” and “supply” are drawn widely
The core rule is reg 40AB(1): a person must not advertise a water device for supply unless the device is registered with PUB under reg 40AE(3). “Supply” in reg 40A covers sale, lease, loan, consignment, hire and hire-purchase, and expressly includes offering to supply and displaying for supply, in the course of trade.
That definition is why there is no separate rule for online marketplaces: a product listing on a marketplace, an Instagram shop or a brand’s own website is an offer to supply, so it is caught directly. PUB’s Water Fittings page confirms the scheme covers physical retail shops and suppliers’ showrooms, including online portals and resellers, and says PUB checks online portals as well as shops. PUB’s guidebook lists the visual media in scope as including newspapers, brochures, catalogues, websites and television.
Behind the advertising rule sit three supply-side duties a marketer should know about, because they determine whether a product can be advertised at all:
- Registration. A water device cannot be supplied unless it is registered and carries the label as required, and importers and manufacturers must themselves be registered suppliers (reg 40AA).
- Testing. PUB says every water fitting must be tested to its standards and requirements before it is advertised.
- Label integrity. Only a registered supplier may affix the label it was issued; altering, forging, removing, obscuring or defacing a label without reasonable excuse is an offence (reg 40AD).
What each ad format must show
Regulation 40AB(2) sets the display rule, and it depends on the format.
Ads with a visual element, other than print
Websites, product listings, social posts, display ads, email, video and television fall here. Under reg 40AB(2)(a)(i):
- (A) the Water Efficiency Label must, as far as practicable, be shown next to the image or description of the water device; or
- (B) where that is not practicable, the ad must state all the information on the label.
PUB’s guidebook adds that each model in an ad must carry its own label, and that labels must be shown with prominence. A banner showing four mixer taps needs four labels, not one in the footer.
Print ads
Under reg 40AB(2)(a)(ii), a print ad can either comply with the same rule as above, or state the four items listed in reg 40AB(2A): the tick rating, the brand, the model number and the PUB registration number. This print option has applied since 1 April 2019 and is designed for newspaper inserts and catalogues where small label artwork reproduces badly.
Every ad, whatever the format
Regulation 40AB(2)(b) is the rule most likely to catch copywriters: the ad must not claim or imply that the water device is tested, certified or approved by the Government or PUB. The label shows that a device is registered and rated; it is not an endorsement. “PUB-approved tap”, “Government-certified water saving” and a headline built around the label as a seal of approval all breach it. “3-tick water efficiency rating” is a factual statement of the rating and is the safer way to say the same thing.
Who carries the duty
Regulation 40AB is addressed to “a person” who advertises, not only to the registered supplier. That matters because water devices are often advertised by several people at once: the brand or its distributor, the importer, a bathroom showroom, independent marketplace resellers, and renovation companies that bundle fittings into package prices.
- Registered suppliers hold the registration and the label artwork, so they are best placed to supply both to every reseller. Making labelled images and the four print items part of the dealer pack prevents most problems downstream.
- Resellers and marketplace sellers advertise in their own right when they list a device for sale. A listing copied from a supplier’s catalogue without the label is the reseller’s breach, not only the supplier’s.
- Renovation and design-and-build firms fall in scope when an ad offers named devices as part of what the customer buys. A portfolio photo of a finished bathroom is a different thing from a package ad naming the tap model and price.
Unlike NEA’s energy-label rules, which our energy-label guide explains include a specific carve-out, we found no express exemption in the water regulations for publishers or agencies. The prudent reading is that anyone who creates or places an ad offering a water device should treat the display rule as their own duty, and agencies should build the label check into their creative sign-off.
Penalties and enforcement
Breaching reg 40AB(1) or (2) is an offence (reg 40AB(3)). The general penalty in reg 47 is a fine of up to $10,000, imprisonment of up to 12 months, or both, and for a continuing offence a further fine of up to $250 for every day the offence continues after conviction. Supplying an unregistered or unlabelled device, and tampering with labels, are separate offences.
PUB also has a recall power: under reg 40AH it can order a supplier to recall non-compliant devices at the supplier’s own cost, and failing to comply is an offence unless the person shows due diligence. For a retailer, a recall of stock it has already advertised is a far bigger cost than the fine.
We found no published prosecution specifically for a non-compliant water-device ad, so we cannot point to a benchmark case. What PUB does say is that it checks online portals as well as shops — which in practice means marketplace listings are where enforcement starts.
How the rule got here
The scheme has been tightened in steps rather than introduced in one go, which is why older guidance and supplier templates are often out of date.
Applying it channel by channel
Marketplace and webstore listings
The product page is the ad, so the label belongs beside the main product image or in the image set itself, for every model and every variant that has its own registration. Where a listing bundles variants — a basin mixer in chrome, matte black and brushed gold — check whether they share one registration or have separate ones, and show the right label against each. Put the tick rating and registration number in the product attributes as well; it costs nothing and helps if a label image fails to load.
Social posts and short video
A product reel or carousel that offers a specific tap or washing machine for sale is a visual ad. Put the label on the frame or slide where the product appears; where a fast-cut video makes that impracticable, state all the label information in the post. A brand-awareness post that shows a bathroom without offering a device for supply is less clearly in scope, but the moment the caption names a model and a price, treat it as an ad.
Search and shopping ads
Text search ads rarely show an image of the device, and a shopping ad’s image is the product feed image. The practical approach is to make the feed image the labelled one where the platform’s image policies allow it, and to make sure the landing page carries the label beside the product. Our guide to Google Shopping in Singapore covers feed images and attributes. If you cannot see how to comply in a given ad format, PUB’s guidebook (clause 21) lets vendors send a draft ad to PUB for clearance before publishing — use it.
Email and catalogues
A promotional email is a visual, non-print ad: one label per model, beside its image. A printed catalogue or newspaper insert can use the four-item option instead — tick rating, brand, model number and registration number under each product — which is usually cleaner than reproducing small label artwork.
Showrooms and point of sale
The display rules for physical showrooms sit in the labelling and supply duties rather than the ad rule, but the same principle applies: every displayed model must carry its label. If your digital ads drive showroom visits, the in-store label should match what the ad said.
Five ads, checked
- A marketplace listing for a kitchen mixer with “PUB certified water-saving” in the title. Fails reg 40AB(2)(b) whatever else it gets right. Replace with “3-tick water efficiency rating” (if that is the rating) and add the label beside the main image.
- A newspaper insert from a bathroom retailer showing 20 fittings. Compliant if each product shows its label, or lists its tick rating, brand, model number and PUB registration number. One shared label at the bottom fails.
- An Instagram carousel for a washing machine promotion. A visual ad: the label goes on the slide that shows each machine. Washing machines are rated up to four ticks, so the rating is a selling point worth putting in the copy as well.
- A showerhead brand’s “most water-efficient shower in Singapore” campaign. Showerheads are outside the mandatory scheme, so no label duty applies — but the superlative is still a claim that must be substantiated under general consumer protection law. See our guide to green claims marketing in Singapore.
- A new import of mixer taps, advertised for pre-order before PUB registration. Fails reg 40AB(1): an unregistered water device cannot be advertised for supply, and a pre-order is an offer to supply. Register first, then launch.
A compliance checklist for water device ads
- Confirm each product is a “water device” and not one of the exempt or voluntary categories.
- Confirm each model is registered with PUB, and that the importer or manufacturer is a registered supplier.
- For each visual ad, place the right label next to each model’s image or description; if impracticable, state all the label information.
- For print, either show the label or state tick rating, brand, model number and PUB registration number.
- Remove any wording or imagery implying PUB or Government testing, certification or approval.
- Check marketplace listings and feeds, not only brand-owned ads; PUB checks online portals.
- Replace supplier templates written before January 2024.
- For appliances that are also energy-labelled products, check the NEA duty separately.
- When in doubt, send the draft ad to PUB for clearance before publishing.
In the e-commerce accounts we manage, labelling problems almost never come from the brand’s own campaigns. They come from listings copied by resellers, feeds built from old supplier data, and creative resized until the label falls off. A quarterly sweep of every live listing, using the checklist above, catches most of it. For the wider rules that apply to product descriptions, see our guide to the Trade Descriptions Act for marketers, and for measurement claims on packaging and listings, weights and measures rules for marketing.
Frequently asked questions
Do online listings for taps in Singapore need the water efficiency label?
Yes. A listing is an offer to supply, so it is an advertisement for supply under the Public Utilities (Water Supply) Regulations. The Water Efficiency Label must appear next to the image or description of each model where practicable, or the listing must state all the label information. PUB says it checks online portals as well as shops.
Which products need the PUB water efficiency label in ads?
Taps and mixers, flushing cisterns, urinal and water-closet flush valves, waterless urinals, household clothes washing machines and household dishwashers. Commercial washer extractors, commercial dishwashers and covered high-pressure washers must be registered but are exempt from the label display duty. Showerheads are voluntary only.
What must a print ad for a water fitting show?
A print ad can show the label next to each product, or state four items for each: the tick rating, brand, model number and PUB registration number.
Can I say a tap is PUB approved?
No. Regulation 40AB(2)(b) prohibits any ad from claiming or implying that a water device is tested, certified or approved by the Government or PUB. State the tick rating instead.
What is the penalty for not showing the water efficiency label?
It is an offence under regulation 40AB(3). The general penalty in regulation 47 is a fine of up to $10,000, imprisonment of up to 12 months, or both, plus up to $250 a day for a continuing offence. PUB can also order a recall at the supplier’s cost.
Do showerhead ads need a water efficiency label?
No. PUB lists showerheads as voluntary under the Water Efficiency Labelling Scheme, so the mandatory advertising duty does not apply. Any efficiency claim in the ad must still be accurate.
The takeaway
The Water Efficiency Label rule is short and specific: register before you advertise; put the label beside every model in every visual ad, or the full label information where you cannot; use the four-item option in print if it suits; and never present the label as PUB’s approval. Because “supply” includes offering and displaying, it reaches every marketplace listing, social post and email that sells a tap, cistern, washing machine or dishwasher — the places where labels most often go missing. The fine is significant, but a recall of stock you have already sold is the bigger risk.
If you sell regulated household products online and want campaigns and listings built with the labelling layer designed in, that is what our performance marketing team in Singapore does; see our client case studies. Start with our complete guide to performance marketing in Singapore, then digital marketing for e-commerce in Singapore.
