When to Call a Plumber: Warning Signs to Watch Out For

Unusual Noises Coming from Your Pipes? It Could Be More Than Air

It might be tempting to ignore a gurgle here or a bang there, but unusual sounds in your plumbing system shouldn’t be dismissed. Gurgling often points to venting problems or air trapped in the system. Banging, also known as water hammer, can suggest high pressure or loose pipe fittings, which can damage your plumbing over time.

Calling a plumber at this stage could help you avoid more serious issues. 

Common noises to listen for include:



• Gurgling from drains or toilets
• Banging or hammering on pipes when taps are turned off
• Whistling or hissing noises around pipework
  

Recurring Drain Blockages Can Signal a Bigger Problem

A one-off slow drain might just be a build-up of hair or soap, but when it happens repeatedly, you could be dealing with something more serious. Frequent blockages are often a sign of larger issues within the sewer line or drain pipes, like tree root invasion or a partial collapse of the line.



A qualified plumber can investigate the system thoroughly and identify the underlying issue. 

Watch for:

• Toilets that don’t flush properly, even after plunging
• Shower or sink drains that bubble or empty slowly
• Water is backing up from one drain when another is used
  

Water Pressure Drops Aren’t Just Annoying—They May Signal a Leak

If your once-strong shower is now more of a dribble or your kitchen tap struggles to rinse dishes, don’t just blame the tapware. Sudden or gradual drops in water pressure can indicate pipe leaks, mineral buildup, or even broken valves.

Water pressure issues can stem from:

• Hidden leaks behind walls or under slabs
• Rusted or corroded galvanised pipes
• Problems with your pressure-reducing valve (PRV)

Left unchecked, these issues can damage appliances, reduce plumbing efficiency, and contribute to mould growth from unnoticed leaks.

Don’t Ignore Water Stains or Damp Patches on Walls & Ceilings

Damp patches aren’t just cosmetic—they signal that water is finding its way where it shouldn’t. Leaks from pipes inside walls or ceilings often appear as yellowish or brown marks, flaking paint, or soft, spongy drywall.

This can be an early indicator of a burst pipe or a leaking joint. Don’t wait until water starts dripping through the ceiling—call a plumber as soon as you spot:



• Peeling paint or blistering plaster
• Musty smells near the area
• Water stains on the ceiling or high on the walls

Identifying and repairing internal leaks quickly helps prevent structural damage and costly remediation later.

Unpleasant Odours from Sinks or Drains Are a Red Flag

Persistent smells coming from your drains are more than a nuisance. They often indicate a blockage or a broken seal in your plumbing. If it smells like sewage, chances are it’s just that—sewer gas backing up into your home due to a dry trap or a damaged vent pipe.



Common odour-related concerns include:

• Rotten egg or sulphur smells near sinks or floor drains
• Gassy smells in bathrooms or laundries
• Whiffs of mildew, particularly near wet areas

A licensed plumber can inspect for leaks, check ventilation, and restore proper drainage flow to eliminate the source of the smell.

The Sounds of Running Water When No Taps Are On

The sound of water flowing when no taps are used is an unmistakable sign that you may have a hidden leak. Often, this means water is running somewhere within your walls or under the floor. Left alone, these leaks can lead to foundation issues, rot, or even high water bills.



What to check:

• Your water meter for unexpected activity
• Hot water system hissing or running intermittently
• Toilet cisterns are constantly filling without being flushed

These signals shouldn’t be ignored. Hidden leaks waste water and can cause extensive damage over time if not located and repaired.

Visible Corrosion or Rust on Pipes & Fixtures

Corrosion clearly indicates that your plumbing is ageing and likely to fail soon. Rust and white mineral deposits typically form where leaks or condensation persist, often at pipe joints or around tapware.

If you spot corrosion, you should:

• Inspect under sinks and behind appliances regularly
• Look at outdoor taps and garden hose connections
• Note any green, blue, or orange residue around joints

Corroded pipes reduce water quality and are more prone to rupture. A plumber can assess whether repair or full replacement is the best course of action.

Your Hot Water System Acts Up: What It Means & Who to Call

Sudden loss of hot water or inconsistent water temperatures often suggest problems with your hot water system. Whether electric or gas, these systems need regular maintenance—and occasional replacement—to continue functioning properly.



Warning signs your hot water system needs a plumber include:

• Discoloured or rusty water from hot taps
• Water that’s too hot or not hot enough
• Leaks or pooling around the system base

Ignoring these issues could result in no hot water at all, often at the worst time. A licensed plumber can inspect the unit, test the valves, and advise whether repair or replacement is necessary.

Get Reliable Help from Trusted Plumbers in the Southern Highlands

At The Plumbing & Drainage Co., we know how important it is to catch plumbing problems early—before they escalate into emergencies. If you’ve noticed any of the signs above, don’t wait. Get in touch via our contact page or give us a call for more information or to book a consultation. Whether you’re dealing with a noisy pipe, a faulty hot water system, or a hidden leak, our team is ready to help homes and businesses across Mittagong and the Southern Highlands with reliable, professional plumbing services.