Signs Your Drain Is About to Block (Sunbury Plumbing Advice)

5 Warning Signs Your Drain Is About to Block (Sunbury Plumbing Advice)

If you’re living in Sunbury or the surrounding suburbs, you’ll know our older sewer systems and tree-heavy backyards are a recipe for blocked drains.

The good news? Your drain usually gives you plenty of warning signs before it fully blocks — if you know what to look for. Here are the top 5 red flags we see on jobs every week:

1. Toilet Slow to Flush

If your toilet takes longer than usual to flush, or it doesn’t clear with one go, there could be a partial blockage in the waste pipe. Don’t wait until it backs up onto the floor — this is often the first sign of trouble.

2. Gurgling Sounds in Sinks, Baths or Showers

Hearing gurgling after using the sink or when the washing machine drains? That’s air struggling to escape because something downstream is starting to clog.

It’s not just annoying — it’s your system yelling for help.

3. Water Pooling Outside

Stormwater pooling near your gully trap, sewer lid or in the lawn is a classic sign of a blocked main drain. It usually means the water has nowhere to go and is coming up the path of least resistance.

4. Bad Smells Coming from Drains

That foul, sulphuric smell around the kitchen sink, laundry or bathroom? It’s often a sign of decaying waste, food or sewerage trapped in a pipe that isn’t draining properly.

5. Overflowing Gully Trap

If your outdoor drain is overflowing during normal use (not just a downpour), it’s a clear sign of a serious sewer blockage. You’ll usually need jetting and CCTV to clear it properly.

Don’t Wait for It to Block Completely

Most blocked drains start small. If caught early, they’re cheaper and easier to clear. Wait too long, and you could be dealing with dig-ups, pipe replacement, or sewer damage.

If you’ve noticed any of the signs above, don’t risk it.

Call Rosco’s Plumbing for Fast Blocked Drain Service in Sunbury

We clear sewer and stormwater drains fast using:

• High-pressure jetting
• CCTV camera inspections
• Honest advice — no upselling, no band-aid fixes

Click here to learn more about our blocked drain services in Sunbury

Or call 0408 545 412 to book a local plumber today.

We Also Service:

Gisborne, Diggers Rest, Melton, Caroline Springs, Romsey and nearby areas.