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In the UAE, what matters is not a personal plumbing licence but the company behind the technician. A legitimate plumbing outfit holds an economic licence from the emirate's licensing authority — the Department of Economy and Tourism in Dubai, ADDED in Abu Dhabi, the economic development departments elsewhere — with an activity such as plumbing and sanitary installation or building maintenance listed on it. The person in your bathroom should be a sponsored employee of that company, and when work goes wrong — a joint fails inside a wall three weeks later, a heater connection drips into the flat below — your recourse runs through that company, its licence and its insurance.

A freelancer moonlighting from an unrelated job has no licence, no insurance and, practically speaking, no address. If his joint floods the apartment beneath yours, the claim lands on you as the person who hired him. The gap between a licensed company and an unlicensed handyman on a mixer swap might be AED 50–150; the gap when a concealed connection fails is a collapsed gypsum ceiling, warped wardrobes and a five-figure bill in dirhams. Compliance is the cheapest insurance you will ever buy.

Verification takes five minutes and most people never do it. Ask for the trade licence number and check it on the issuing emirate's public lookup — Dubai's DET and Abu Dhabi's ADDED both offer online searches, and the other emirates have equivalents. Confirm the licence is current and the listed activity actually covers plumbing or sanitary works. Then ask two questions in writing: do you carry public liability insurance, and what workmanship warranty applies. Serious maintenance firms answer both without hesitation; vague answers here predict vague accountability later.

Booking through a platform changes the picture. tamam, the UAE super-app for home, car and health services, lists multiple verified vendors for plumbing work with transparent AED price ranges rather than a single take-it-or-leave-it figure, and keeps booking, payment and the job record in the app. That record matters for compliance, not just convenience: if a repair fails, you hold a documented trail of who did what and when — precisely what a WhatsApp number that stops answering can never give you.

Every summer, complaints about sewage smells spike, and most involve nothing broken at all. Under every floor drain and fixture sits a trap — a bend holding a plug of water that blocks sewer gas. In a UAE summer, with air conditioning drying the indoor air and guest bathrooms unused for weeks, that water plug evaporates, and the building's drainage stack breathes into your home. The first fix costs nothing: pour a jug of water into every floor drain and run rarely used taps for a minute, once every week or two. A spoon of vegetable oil on top slows evaporation in bathrooms you rarely enter.

If the smell survives recharged traps, pay for a professional look, because the remaining causes are real defects: a failed wax seal under a toilet, a cracked or badly joined vent line, or a floor trap installed without a proper seal — not unheard of in fast-built stock. There is a compliance angle even here: persistent odour in a tower can indicate a shared stack or vent problem, which is common-area infrastructure and the building's responsibility. A technician who traces the smell to the stack should say so and stop, not sell you repeated deodorising visits. Keep the visit report as evidence when you push facilities management to act.