Wong.s Engineering is an HDB plumbing firm at 10 Anson Road, #02-02 International Plaza, in Tanjong Pagar. Its website says it has an HDB renovation licence and more than 20 years of experience working in HDB flats. It clears chokes in kitchen and toilet floor traps, basins, sinks, toilet bowls and urinals. It also installs and repairs taps, sinks, toilet bowls, urinals and water heaters, and repairs concealed pipes, UPVC, copper and stainless steel pipes and pipe leaks. Tile replacement and overlaying in HDB flats is also offered. The website says customers can send a photo or video of the problem for an estimated price, and that the firm aims to arrange a same-day appointment. To reach the firm, WhatsApp 9830 7736. One customer says a plumber came within a few hours to clear a kitchen choke, cleaned up afterwards and explained how to prevent the problem. Others praise the plumber as professional, punctual, patient and reasonable. Within a kilometre there are five other plumbers on Open Locally.