At a home on Park View Drive in Carnegie VIC 3163, our team at Your Choice Plumbers was called out after the homeowner had already been through the frustration of multiple unsuccessful attempts to clear a badly blocked kitchen drain.

By the time we arrived, this was no longer a simple blocked drain job. Two other plumbing companies had already attended and the sink was still not draining properly. That immediately told the homeowner what many people already suspect in this situation: a slow-draining kitchen sink is one thing, but a drain that keeps blocking after others have already tried to clear it usually means the real obstruction has not been removed properly.

This is exactly the type of issue where homeowners start asking, “why does my kitchen sink keep blocking even after plumbers have been?” or “can grease build-up block both the kitchen pipe and the underground drain?” As an experienced plumber Carnegie, we often find that grease blockages need a much more systematic approach than simple poking, plunging, or partial clearing.

The Problem – A Heavy Grease Blockage Built Up Over Time

The property was around 15 years old, which is very consistent with the kind of long-term grease build-up we see in kitchen drainage systems that have gradually accumulated cooking oils and fats over many years.

In this case, the blockage was not limited to one small section of waste pipe. The grease had built up extensively enough to affect:

  • the 50mm kitchen drain line
  • and the 100mm underground UPVC branch drain

That is why earlier attempts had failed.

The line had not been truly cleared. Previous work had only created a small passage through the grease, allowing the water to move a little better temporarily while leaving the main mass of fat still attached inside the pipe.

That is a very common reason blocked kitchen drains return so quickly. The drain appears “better” for a short time, but the real obstruction is still sitting there waiting to catch more waste.

Why Grease Blockages Need the Right Clearing Method

Kitchen grease blockages are very different from many other drain problems.

Once oils and fats cool inside the pipe, they begin sticking to the internal walls. Over time, that residue thickens and hardens, reducing the pipe diameter until the drain cannot carry normal wastewater properly.

This type of blockage often:

  • builds slowly over years
  • affects more than one section of pipe
  • resists conventional drain snakes
  • and returns quickly if only partially cleared

That is why a severe kitchen grease blockage should be treated as a specialised hydro jet drain cleaning and CCTV drain inspection job rather than a simple generic unblock.

Why Previous Attempts Had Not Solved the Problem

By the time we assessed the drain, it was clear the issue was not that the blockage could not be reached. It was that it had not been removed thoroughly enough.

A partial opening had likely been made through the grease mass, but that is not the same as restoring the internal pipe wall properly.

If the grease remains attached to the pipe:

  • water may still trickle through
  • the sink may seem improved briefly
  • but the remaining grease catches more debris quickly
  • and the blockage returns

That is why the homeowner had already gone through repeated frustration before calling us.

Gaining Proper Access Through the Kitchen Waste

To clear the line properly, we first disconnected the 50mm S-trap waste pipe inside the under-sink cupboard.

This gave us the access point needed to attack the blockage directly through the kitchen line, which was important because the work had to be done accurately and carefully in an indoor setting.

Kitchen drain clearing inside the home requires controlled setup, proper access, and the right equipment to avoid mess while still getting enough power into the line to remove the obstruction properly.

Clearing the Grease Build-Up with High-Pressure Jetting

Once access was established, we inserted a specialised grease-breaking nozzle and began the clearing process using high-pressure jetting.

This was the right method because the blockage was dense, extensive, and affecting both the 50mm kitchen line and the connected 100mm underground branch drain.

The job required:

  • controlled indoor access
  • specialised nozzles suited to grease clearing
  • sustained high-pressure cleaning
  • and enough time to strip the pipe properly rather than simply punch another hole through the build-up

After around one hour of intensive jetting, the grease deposits were broken up and flushed away properly.

This was a much stronger and more complete approach than the homeowner had received previously.

CCTV Verification Confirmed the Drain Was Properly Clear

Once the heavy grease mass had been removed, we followed up with a CCTV drain camera inspection.

This step is critical because it allows both the plumber and the homeowner to confirm whether the line has actually been restored properly.

The camera showed that:

  • the large grease deposits had been removed
  • the kitchen waste line was clear
  • the underground branch drain was also restored
  • and the pipe was flowing properly again

That gave the homeowner the confidence of seeing the result for themselves, rather than simply being told the drain was “probably okay now.”

This is exactly why we often combine hydro jetting with a CCTV drain inspection on stubborn blocked drains. One clears the problem. The other confirms the result.

The Result – Kitchen Drain Restored Properly After Others Failed

Once the work was complete, the homeowner had:

  • the blocked kitchen sink restored properly
  • the 50mm kitchen waste line cleared
  • the 100mm underground branch drain cleared
  • visual camera confirmation that the grease was actually gone
  • and a much more reliable long-term result than previous attempts had achieved

What made this case especially valuable for the homeowner was not just that the drain was flowing again, but that they could finally see the difference between partial clearing and a proper full clean-out.

Why This Job Matters

This case is a strong example of why repeated blocked kitchen drains should not be treated as “just another sink blockage.”

Where heavy grease is involved, the real goal is not simply to get the water moving. It is to remove the obstruction from the pipe walls properly so the drain has a genuine chance of staying clear.

It also shows why the right equipment matters so much. Without proper hydro jet drain cleaning and CCTV drain inspection, this homeowner could easily have ended up paying for another temporary fix.

Our Home Plumbing Experts Approach

At Your Choice Plumbers, we do not just focus on restoring short-term flow.

On drainage jobs like this, we focus on:

  • what is actually inside the pipe
  • why the blockage keeps returning
  • what clearing method will solve it properly
  • and how to verify the result so the homeowner has confidence in the repair

That is the difference between a temporary improvement and a true blocked drain solution.

Need a Plumber in Carnegie?

If you are dealing with a blocked kitchen sink, a recurring grease blockage, or want your drain cleared properly instead of partially opened again, visit our Plumber Carnegie page to learn more about how we help local homeowners.

You can also learn more about our blocked drains Melbourne, hydro jet drain cleaning, and CCTV drain inspection services.