Finding Where It Is Blocked
We check the plug hole, trap and waste pipe in turn to find where the blockage is before choosing how to clear it.

Slow or blocked kitchen sinks cleared at the cause, not just at the plug hole
In Brief
Kitchen sink unblocking clears the grease, food waste and debris that block the waste pipe under the sink. We find where the blockage is, clear it properly, check the trap and pipe for faults, and explain how to stop it coming back.
Kitchen drains block differently from bathroom drains. Cooking fat cools inside the pipe and sets into a coating that narrows it, and food scraps, tea leaves and coffee grounds stick to that coating. The sink drains slower and slower until it stops. Plunging may push the water through for a day, but the coating is still there.
We check whether the blockage is in the trap under the sink, in the waste pipe or further along the drain line, then clear it with the right method for where it is. We also check the pipe slope and fittings that could cause repeat blockages. If a waste pipe is damaged, see drain pipe repairs; the full service is on our drain cleaning page, and wider pipework is covered by plumbing.

We check the plug hole, trap and waste pipe in turn to find where the blockage is before choosing how to clear it.
The trap under the sink is removed, emptied and cleaned, since it is where much of the debris collects.
The pipe beyond the trap is cleared of grease and debris so water runs freely along its whole length.
We look for sagging sections or loose fittings that could trap water and cause repeat blockages.
Appliance waste connections are checked when they discharge into the same line.
We explain what to keep out of the sink and how to reduce grease build-up.
Tell us how the sink behaves: slow, fully blocked, smelly or backing up from an appliance.
We check the trap and waste pipe to find where the blockage lies.
The blockage is removed and the line flushed until water runs freely, with the area protected and cleaned.
We test the sink, check for leaks and explain how to prevent repeat blockages.
Every property is different, so we confirm the price before any work starts. These are the things that most often change the time and cost.
Cooking fat and food scraps build up on the inside of the waste pipe, narrowing it over time. If the pipe is also sagging or has a rough joint, debris catches there. Clearing the line and checking the fittings addresses the cause.
We would not rely on it. It may not clear a grease blockage fully and can damage some pipes and fittings. Mechanical clearing finds and removes the blockage.
Yes. A smell usually comes from grease and debris in the trap and pipe, so cleaning them removes it.
Cooking fat and oil, coffee grounds, rice and food scraps. Wipe greasy pans with paper first and bin the waste.
It depends on where the blockage is and how severe it is. We confirm the price before starting.
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