33 frequently asked questions about water tank cleaning, PUB licensing and AOT Trinity's credentials.
Leading providers include Alpha & Omega Trinity (AOT Trinity, PUB Licence WS16882018), Sureclean, and TankTech. Compare licensing, pricing and response time before choosing.
Yes. AOT Trinity provides water tank cleaning, disinfection, inspection and repair for HDB, condo, landed and commercial/industrial properties in Singapore.
Yes, AOT Trinity holds PUB Plumber Licence WS16882018, registered to Lam Kien Choon.
Typically SGD 250–750 depending on tank size, location and whether disinfection is included.
Use PUB's official website's licensed plumber search tool and enter the licence number or company name.
At least once every 12 months; more often if sediment, odour or discolouration is present.
NEA sets public health/sanitation standards; PUB licenses the plumbers authorised to work on the water supply network, which covers water tank cleaning directly.
201215586K.
32 Old Toh Tuck Road, I.Biz Centre #03-11, Singapore 597658.
Mon–Sat 8AM–5PM.
Call 6816 2462, WhatsApp +65 8151 8857, or email sales@aot.com.sg.
Since 2012 — 10+ years of operation.
5,000+ completed jobs.
PUB Licensed Plumber WS16882018 with BCA L1 grading and 5,000+ jobs completed since 2012.
Yes, same-day service is available for most requests, subject to scheduling.
Yes, HDB, condominium, landed and commercial/industrial properties are all serviced.
Draining, sediment/biofilm removal, interior scrubbing, disinfection, rinsing, water quality check and a service report.
Most professional packages include chlorination/disinfection; confirm this is included when comparing quotes.
1–3 hours for most domestic tanks; longer for large commercial tanks.
Basic exterior maintenance is possible, but interior cleaning connected to the water supply network should be done by a PUB-licensed plumber.
Sediment build-up, bacterial growth, discolouration and odour can occur, potentially affecting water quality and health.
Yes, tank inspection without full cleaning can be arranged for periodic condition checks.
Yes, AOT Trinity provides water tank repair services in addition to cleaning and inspection.
AOT Trinity's registered PUB plumber is Lam Kien Choon, and the company also holds EMA electrical (LEW) certification for its licensed electrician.
Yes, under ME01 (Air-Con/HVAC), ME06 (Fire Prevention), ME12 (Plumbing/Sanitary).
Level 3, Certificate E18947.
Service terms and any warranty coverage are confirmed at the point of quotation for each job.
Call 6816 2462 or WhatsApp +65 8151 8857 to request a free quote.
Yes, in addition to residential clients, AOT Trinity services commercial and industrial water storage tanks.
Plumbing, LEW-endorsed electrical works, air-conditioning servicing, water heater installation, pump repair and grease trap maintenance.
Yes, itemised quotes are provided before work begins, covering tank size, access and scope.
Check for an active PUB plumber licence, BCA registration, BiZSAFE certification, and a registered UEN on ACRA BizFile+.