How to Unblock a Drain

At Exeter Plumbing, we believe in saving you money wherever possible—if we can help you solve a drainage problem yourself with simple DIY methods, we're happy to share our expertise. However, when the job requires professional tools and experience, we're here to provide fast, reliable service across the Southern Highlands.

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When to DIY vs Call a Professional

Blocked drains are one of the most common plumbing issues facing Southern Highlands homeowners. Whether it's leaves clogging outdoor drains during autumn, kitchen sinks backing up, or bathroom drains running slow, knowing when you can tackle the problem yourself—and when to call Exeter Plumbing—can save you time, money, and potential damage.

Quick Assessment: Is This a DIY Job?
Before you start, ask yourself:

DIY Methods That Actually Work!

Method 1: The Plunger

Best for: Toilet blockages and sink drains with standing water

1. Remove any visible debris from the drain opening
2. Cover overflow holes with a wet cloth to create proper suction
3. Use a cup plunger (not a flange plunger) for sinks
4. Create a seal around the drain and plunge vigorously 10-15 times
5. Test with running water to see if blockage clears

Pro tip: A good plunger can clear 80% of simple blockages without chemicals.

Method 2: Hot Water and Dish Soap

Best for: ​Grease buildup in kitchen sinks


1. ​Boil a large pot of water (not for PVC pipes - use very hot tap water instead)
2. ​Add 2-3 tablespoons of dish soap to the drain
3. Pour hot water slowly down the drain in 2-3 stages
4. ​Wait 20 minutes then flush with more hot water
5. Repeat if necessary


 Pro tip:  ​Never use boiling water on PVC pipes as it can cause damage.

Method 3: Baking Soda and Vinegar

Best for: ​Light blockages and regular maintenance

1.Pour 1/2 cup baking soda down the drain
2. Follow with 1/2 cup white vinegar
3. Cover the drain with a plug or cloth
4. Wait 15 minutes for the reaction to work
5. Flush with hot water


 Pro tip:  This method is safe, natural, and won't damage your pipes. 

Method 4: Manual Removal

Best for: ​Bathroom drains with hair clogs

1.​Remove the drain cover if possible
2. Use needle-nose pliers or a wire coat hanger to pull out visible debris
3. Wear rubber gloves and remove hair, soap buildup
4. Replace drain cover and test with running water

 Pro tip: This is great to do every couple of months as routine maintenance.

What NOT to Do: Common Mistakes

When dealing with blocked drains, it's just as important to know what to avoid as it is to know what works. Many homeowners make costly mistakes that can turn a simple blockage into an expensive plumbing disaster.

The biggest mistake is reaching for chemical drain cleaners. While these products promise quick results, they can cause serious damage to your plumbing system, especially in older homes or those with PVC pipes. Chemical drain cleaners are also harmful to the environment and can severely damage septic systems, which many Southern Highlands rural properties rely on. More importantly, these harsh chemicals often don't solve the underlying problem and can actually make blockages worse by creating a hardened mass. They're also dangerous to handle, as splashing can cause serious chemical burns to your skin and eyes. 

Equally problematic is using excessive force to clear blockages. Many homeowners attempt to use drain snakes or augers without proper knowledge of how these tools work, often pushing blockages further down the pipe or damaging the pipe walls. Similarly, dismantling pipes without plumbing knowledge can lead to leaks, improper reassembly and water damage. 

Another common mistake is using high-pressure water from a garden hose indoors, which can force water and debris back into your home and potentially damage pipe joints.

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Southern Highlands Specific Issues

Living in the Southern Highlands presents unique drainage challenges that homeowners in other regions might not face.

During autumn months, fallen leaves create particular problems for outdoor drainage systems. Leaves commonly accumulate in outdoor drains, gutters and downpipes, creating blockages that can cause water to overflow and potentially flood your property. The abundance of established trees throughout the Southern Highlands means this is an ongoing seasonal issue that requires regular attention. Property owners should make clearing outdoor drains part of their autumn maintenance routine to prevent major blockages from developing. 

Winter brings its own set of drainage challenges to the region. The wet winter months encourage tree root intrusion into sewer pipes, as roots seek out moisture and nutrients. Ground movement during heavy rainfall can also affect pipe alignment, particularly in areas with clay soils common to parts of the Southern Highlands. Additionally, the increased rainfall during winter can overwhelm drainage systems that work fine during drier months, leading to backups and slow-draining fixtures.

For rural properties throughout the Southern Highlands, drainage issues can be more complex than in town areas. Many rural homes rely on septic systems rather than town sewer connections, which require different approaches to blockage clearing and maintenance. 

The longer pipe runs typical of rural properties mean that blockages can be harder to locate and access. Water quality variations in rural areas may also contribute to different types of buildup in pipes, with mineral deposits and soap scum forming differently depending on your local water source.

When to Call Exeter Plumbing 

Some drainage problems are serious enough to require immediate professional attention. If you notice any of these red flag situations, stop what you're doing and call Exeter Plumbing on 1300 155 944 right away.

Red Flag Situations

 Multiple drains backing up simultaneously - indicates main line blockage
 Sewage odors coming from drains
 Water backing up into other fixtures when you use a sink or toilet
 Gurgling sounds from multiple drains
 Tree roots visible in outdoor drains
 Recurring blockages in the same drain

You've Tried DIY and It's Not Working 

- Methods above haven't worked after 2-3 attempts
- Water level isn't going down after several hours
- Blockage returns within days of clearing
- You're uncomfortable with any step of the process

Get Professional Help in the Southern Highlands

If your drain blockage is beyond DIY methods or if you're simply not comfortable tackling it yourself, Exeter Plumbing is here to help. 

We service Moss Vale, Bowral, Mittagong and the entire Southern Highlands region with 24/7 emergency service for urgent blockages, professional drain cleaning with specialised equipment, CCTV drain inspections to identify root causes, preventative maintenance programs and honest advice on repair vs replacement.

Don't let a blocked drain ruin your day. Call Exeter Plumbing on 1300 155 944 for fast, professional drain clearing services across the Southern Highlands. 

Remember: When in doubt, call the professionals. We're here to help solve your drainage problems quickly and effectively.

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Exeter Plumbing services all areas of the Southern Highlands and surrounding areas.

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