Grease in a sink drain can cool, cling and trap food debris in Sutton Coldfield

Causes

Grease blockages usually build over time. Liquid fat poured into a sink can cool as it travels through the waste pipe and stick to the inside. Oil, sauces, butter and greasy cooking water leave residue, while food crumbs and soap can collect against it. A strainer helps catch solids but does not stop dissolved or liquid grease from entering the drain. The trap beneath the sink can also gather material and become restricted.

A slow drain is often the first clue. You might hear gurgling, notice water sitting around the plug or find that the sink clears only after a delay. If both bowls of a double sink are affected, or water backs up into another fixture, the restriction may be further along the shared pipework. Those details help distinguish a local trap blockage from a wider drainage problem.

Why it worsens

Grease can form a sticky coating that catches more debris with each use. As the opening narrows, water has less room to carry waste through, so particles settle and the blockage grows. Pouring very hot water may move some softened grease temporarily, but it can cool farther down the pipe and collect again. A plunger used without care can splash contaminated water, and repeated attempts may not reach a blockage beyond the trap.

Chemical drain products are not a reliable substitute for finding the restriction. They can be hazardous, may harm some materials and can leave caustic liquid trapped in plumbing if the sink remains blocked. Never mix drain chemicals with bleach or another cleaner. If you have already used a product, keep its packaging and tell the plumber before work begins.

How we diagnose

We ask what has gone down the sink, how quickly it drains and whether the blockage affects one bowl or more than one fixture. We look at the plug opening and accessible pipework, then assess the trap and waste connection. Where appropriate, we test the flow in a controlled way to see whether water passes freely or backs up. This helps establish whether the restriction appears local or may extend beyond the visible under-sink section.

This is the reference in the service entry, not a promise that every blockage can be cleared within exactly that time or that work on a shared or concealed drain is included. If the issue appears to be outside the sink waste, or damaged pipework is found, we explain the findings and discuss next steps before additional work.

How we fix

We choose a method suited to the obstruction and pipework. For a local blockage, that may involve clearing the trap and removing accumulated grease and debris from accessible sections. If the restriction is farther into the waste, we assess how it can be reached safely. We avoid treating every slow sink with the same chemical or tool; the location, access and condition of the pipe all matter.

After clearing the obstruction, we run water and check that the sink drains without backing up. We also inspect opened connections for leaks before leaving the area. If flow remains poor, the blockage may lie beyond the accessible pipe or another fault may be present. We will explain that rather than claim the problem is solved without a proper test.

Prevention

Let cooking fats cool in a container and put them in household waste according to local guidance, rather than tipping them into the sink. Wipe oily pans with kitchen roll before washing, and use a strainer to catch food scraps. Clean the strainer and visible plug area regularly. Do not rely on boiling water as a routine way to shift grease, since softened residue may settle again farther along the pipe.

When to call

Call if the sink remains slow after you have cleared the strainer, water rises in the bowl or the blockage returns. Seek help promptly if wastewater backs up, a nearby fixture is affected or a leak appears under the sink. Stop running water into a blocked basin to avoid overflow. If a drain chemical has been used, do not dismantle the trap yourself; tell the plumber what product was applied.

Book a call-out

For grease blocked sink clearing, let Maintenance Men know whether you have a single or double bowl, how long the problem has been present and whether any chemical cleaner has been used. If you are searching for a sink repair service, explain whether water is draining slowly or not at all so the call-out can be approached appropriately. Contact us to book an appointment. We will inspect the accessible waste, discuss the likely cause and confirm the scope before starting any additional work.