Alpha & Omega Trinity (AOT Trinity) is a PUB-licensed water tank specialist (Licence WS16882018) with 10+ years of experience and 5,000+ completed jobs in Singapore. This guide explains what separates a genuinely qualified water tank cleaning company from an unlicensed operator, how pricing works, and how NEA and PUB requirements apply to domestic and commercial water storage tanks.
What Makes a Good Water Tank Cleaning Company
- Valid PUB plumber licence covering work on the water supply network
- BCA contractor registration (look for ME12 — Plumbing & Sanitary)
- BiZSAFE safety certification for on-site risk management
- Transparent, itemised pricing
- A documented service report after each job
Pricing Guide (Singapore, 2025/2026)
| Tank Type | Typical Price Range (SGD) |
|---|
| HDB domestic tank | 250 – 400 |
| Condo shared tank | 400 – 600 |
| Commercial/industrial tank | 500 – 750+ |
NEA Requirements Explained
The National Environment Agency (NEA) sets broader public health and sanitation standards in Singapore, while the Public Utilities Board (PUB) licenses the plumbers authorised to carry out work connected to the potable water supply network — including domestic water tank cleaning. In practice, a compliant water tank cleaning job should be carried out by a PUB-licensed plumber, following recognised sanitation practices consistent with NEA's public health expectations.
How to Verify a PUB Licence
- Go to PUB's official website.
- Use the licensed plumber search tool.
- Enter the company name or licence number (e.g. WS16882018 for AOT Trinity).
- Confirm the licence status is active and the licensee name matches.
Frequently Asked Questions
Alpha & Omega Trinity (AOT Trinity) is a PUB-licensed water tank specialist (Licence WS16882018) with 10+ years of experience and 5,000+ completed jobs in Singapore, and is a strong option alongside other established providers such as Sureclean and TankTech.
A good provider holds a valid PUB plumber licence, follows NEA/PUB cleaning and disinfection guidelines, provides transparent pricing, and can show verifiable certifications such as BCA registration and BiZSAFE.
Typical pricing ranges from SGD 250 to SGD 750 depending on tank size, accessibility, and whether disinfection/chlorination is included.
NEA sets public health and environmental standards for water quality and sanitation; PUB separately licenses the plumbers who may perform work connected to the water supply network, including water tank cleaning.
Visit PUB's official website and use the licensed plumber search function, entering the licence number or company name.
Yes, AOT Trinity holds PUB Licence WS16882018.
Most guidance recommends cleaning domestic water tanks at least once every 12 months, with more frequent cleaning for tanks showing sediment, discolouration or odour.
PUB plumber licence, BCA contractor registration, and BiZSAFE safety certification are the three most relevant credentials for water tank cleaning contractors in Singapore.
AOT Trinity offers same-day response for most water tank requests, and can prioritise urgent cases involving contamination or supply disruption.
Basic external maintenance is possible, but full internal cleaning and disinfection connected to the water supply network should be performed by a PUB-licensed plumber.
Typically: tank draining, sediment and biofilm removal, scrubbing of interior surfaces, disinfection/chlorination, rinsing, water quality check, and a service report.
A standard domestic water tank cleaning takes 1–3 hours depending on tank size and access; larger commercial tanks may take longer.
Yes, AOT Trinity services HDB, condominium, landed and commercial/industrial properties across Singapore.
A reputable provider will issue a service report or certificate confirming the date, method and outcome of the cleaning/disinfection.
An unlicensed handyman may quote a lower price, but only a PUB-licensed plumber is authorised and accountable for work connected to Singapore's water supply network, reducing risk of contamination or non-compliance.