Grease Traps and Extraction: The Maintenance Nobody Schedules

Every café has two systems that fail in slow motion. One sits under the sink or outside the back door. The other runs above the cooking line. Neither has a warning light, neither stops working on a particular day, and both are easy to forget because nothing about them is urgent until it is. Then a sink backs up mid-service, or the kitchen fills with heat that used to go somewhere, or an inspector asks for records that nobody has been keeping. The maintenance itself is not difficult or expensive. The problem is that it belongs to nobody in particular.

What a grease trap does, and what happens when it stops

A grease trap sits between your kitchen's waste water and the drain. Fats, oils and grease that go down a sink as liquid cool on the way, and what poured easily out of a pan becomes a lining inside a pipe. The trap slows the flow enough for the fat to separate and float, so it can be pumped out instead of sent onward. That is the whole mechanism. It depends entirely on there being room in the trap for the next lot.

Once a trap is full past its working capacity it stops separating anything and simply passes grease through. You will not notice the day that happens. You notice weeks later, in stages: a sink that drains a little slower than it used to, then a sink that backs up during the rush, then a floor gully that stands full on the busiest evening of the week and a kitchen that has to stop. The cost is almost never the pump-out. It is the service you lost and the emergency rate you paid to get it back.

There is a smell version of the same story. A trap running past capacity is one of the more common reasons a café that cleans properly still smells wrong at the end of a hot day, and staff stop registering it long before customers do. It has a pest version too — a grease-heavy drain line and a waste area are the two things that keep bringing a problem back after treatment, which is the half of the job a pest control contract can't do for you.

What the rules expect of you in the UAE

Food premises that discharge to the public sewer are expected to have a grease trap built to the specification the authorities set, and to keep it working. In Dubai that sits in the emirate's sewerage rules rather than in the food code, which is part of why it gets missed: it is a plumbing obligation attached to a food business, so it doesn't arrive in the same envelope as everything else you were told to do. Waste pumped out of a trap is regulated waste as well, which means it has to be collected and disposed of through approved channels rather than by whoever answers the phone cheapest, and the documentation that comes back to you is the evidence it happened.

We are deliberately not giving you a servicing interval, a penalty or a contractor price. The interval that is right for your kitchen depends on the size of the trap and how much fat your menu actually produces — a brunch kitchen and an espresso bar with a panini press are not the same problem — and the requirement that applies to your premises is set by your own municipality. Ask them directly, get the answer in writing, and treat whatever schedule your contractor proposes as a starting position to be tested against what is actually in the trap when it is opened.

The record-keeping half is where to build the habit. Dated service reports naming what was done, with the disposal documentation attached, filed where you can produce them without a search. It belongs in the same folder as everything else you'd be asked for during a municipality food safety inspection, for the same reason: the work you can't evidence counts as work you didn't do.

Extraction: the system above the line

Extraction is four things that get treated as one: the canopy over the cooking line, the filters in it, the ductwork behind the wall, and the fan at the end of it. The filters are yours — they come out, they get washed, and in a busy kitchen that is a nightly or near-nightly job rather than a weekly one. Everything past the filters is a specialist's job, because grease that gets past a filter condenses inside the duct where nobody can see it and nobody can reach it.

Two things go wrong as that builds. The obvious one is fire: a duct lined with grease turns a small flare-up on the line into something that travels. The unglamorous one is performance. A system pulling against its own residue moves less air for more electricity, so the kitchen gets hotter, the smell starts finding the dining room instead of the roof, and the fan works harder for a worse result — which is also why extraction is worth a look when you're going through a café's electricity bill. Fire safety requirements for extraction are a civil defence matter as much as a municipality one, and again: ask what applies to your premises and get it in writing rather than working from a general rule.

Who pays — you or the landlord?

This is worth settling before you need the answer. In a standalone unit the trap and the extraction run are usually yours to service, and sometimes yours to have installed correctly in the first place. In a mall or a food court you may be connected to a shared system, serviced centrally, billed back through service charges — or you may be connected to a shared system that nobody has clearly taken responsibility for, which is the version that hurts. A shared trap that backs up closes your kitchen whether or not it was your grease.

Ask three questions of any unit before signing: who owns the trap serving this kitchen, who schedules and pays for its servicing, and what happens to my trade if it fails. The answers belong in the lease or in writing alongside it, which is one more line for the list in negotiating a café lease in the UAE. If you have already signed and don't know, find out now rather than at eight on a Thursday evening.

Building a schedule someone actually owns

Both systems give you warning if anyone is looking. Most cafés don't look, because nobody was told to. This is the whole fix, and it costs nothing:

• A name against each job, not a department. "The closing supervisor washes the filters" survives staff turnover. "The kitchen team handles it" does not.
• A date, not a season. Servicing booked for a specific week, in the same calendar you use for licence renewals, so it is scheduled rather than remembered.
• One place the records live. Service reports and disposal paperwork in the same folder as your food safety records, dated, so producing them takes a minute.
• A weekly look between services. Someone lifts the lid or checks the gully once a week and writes down what they saw. That line in a log is what turns a shut kitchen into a scheduled pump-out.

Where MidaOne fits

Honestly: this isn't a job for a point-of-sale system. MidaOne doesn't schedule maintenance, and your service reports belong wherever your inspector expects to find them. What it does give you is the money side of the picture. Servicing contracts and the emergency call-outs that replace them are expenses, and they sit in the sales summary next to revenue, cost of goods and waste rather than in a drawer — so the cost of running these systems reactively instead of on a schedule is a number you can actually see. The day you had to shut shows up too, in sales by day and by hour, which is usually the more persuasive figure of the two when you're deciding whether a service interval is worth the money.

Frequently asked questions

Neither of these systems will ever be the interesting part of running a café. But they are both cheap to look after and expensive to ignore, and the difference between the two is entirely a matter of whether one named person opens a lid once a week and writes down what they found.