Several drains in the flat are slow at once and one gurgles — is it a main-line blockage?

Question

This started as one slow sink and I ignored it. Now it's multiple fixtures at once — the kitchen sink, the bathroom basin and the shower all drain slowly, and here's the odd part: when the washing machine empties, the toilet gurgles and the shower drain bubbles.

I've plunged the sink and poured the usual stuff down it; it helps for a day then goes back to slow. Because it's a small café flat, a backed-up drain isn't just annoying — it's a hygiene problem I can't have.

My question: does several drains struggling at the same time (plus that gurgle) mean the blockage is further down the main/shared line, not in the individual traps under each fixture? And if so, how is that actually cleared — is it a job for rods, or the high-pressure jetting I keep seeing advertised? Trying to understand what I'm actually dealing with before I call someone.

Yusuf T. · Accepted Answer

You've diagnosed it yourself, and correctly. Here's the rule worth remembering: one slow fixture is a local trap problem; several fixtures slow at once — plus a toilet that gurgles when something else drains — is a blockage further down the shared branch or main line. The gurgle is air being pulled through the water traps because the water can't get away fast enough past the obstruction downstream. A plunger on one sink can't fix a blockage that's past the point where all those pipes join.

What's usually down there in a UAE flat: built-up grease and food (kitchen line), hair and soap scum (bathroom), sometimes wipes or scale narrowing the pipe over years. It accumulates at the low points and bends until the bore is half its size.

How it's cleared — and why jetting beats rodding here: rods can punch a hole through a soft blockage (temporary — it closes again, which is exactly your "better for a day" pattern). High-pressure water jetting scours the full bore of the pipe wall clean, so it actually removes the grease/scale layer rather than poking through it — that's why the fix lasts. A good plumber will often camera the line first to find the spot and confirm it's not a collapsed or shared-stack issue.

One check first (free): if you're in a building, ask whether neighbours have the same problem — if the whole stack is backing up, it's a building-management job, not yours. If it's just your flat, a plumber with drain-jetting gear is what clears it properly. Stop the chemical drain cleaners meanwhile — they rarely shift a solid blockage and they sit on it corroding the pipe.

Jason S. · Answer

The neighbour check Yusuf mentions is the big one — had exactly this and it turned out the whole ground-floor stack was blocked, which made it the building's cost, not mine. Ten minutes of asking around saved me a call-out fee. If it IS just your unit, insist they jet rather than just rod it; I paid twice because the first guy rodded a hole through grease and it closed up within a fortnight.

DubaiFix Team · Answer

For a food business specifically: recurring kitchen-line blockages usually trace to grease going down the sink. Once it's jetted clean, a simple grease trap / strainer and never pouring oil down the drain keeps it clear and keeps you on the right side of a hygiene inspection. Worth building the fix into a small preventive routine rather than waiting for the next backup mid-service.

Several drains in the flat are slow at once and one gurgles — is it a main-line blockage?

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