How to Find a Leak Under Your Bathroom Sink

At Aquatrade Plumbing, we often receive calls from concerned homeowners about potential leaks under their bathroom sinks. Knowing how to find and identify these leaks can save you from unexpected costs and unnecessary stress. In this all-inclusive guide, we’re going to journey together through the ins and outs of unearthing a leak lurking beneath your bathroom sink. With every step, we’ll shed light on the hiding spots and tell-tale signs of these sneaky leaks. Let’s get started!

Table of Contents
    Add a header to begin generating the table of contents
    Scroll to Top

    Don’t worry if you’re not a plumbing pro, these tips are designed to help anyone tackle the issue head on.

    The Importance of Detecting Leaks Early

    Here’s a surprising stat for you – did you know that the Australian Bureau of Statistics reports about a tenth of all Aussie homes have had to wrestle with plumbing leaks? It seems like these pesky leaks are more common than we think, mate!

    It’s a surprisingly common issue down under.

    Early detection can save you not only on potential costly repairs, but also on your water bills. As per the guidelines of the Department of Agriculture, Water and the Environment, even the tiniest drip can be a real water guzzler, draining up to a whopping 20,000 litres in a year! A sobering thought, isn’t it?

    How to Detect a Leak Under the Bathroom Sink

    Step 1: Preliminary Inspection

    Initially, remove all items from under your sink. Then, wipe the area with a dry towel. This will help you identify new droplets that could indicate a leak. Keep your senses on high alert for any telltale signs of water’s mischievous deeds – discolouration, paint that’s started to peel, or even a lingering musty odour. These could all point to a pesky leak hiding out under your sink.

    Step 2: Identify the Source

    The main parts to inspect are the sink drain, the P-trap, and the water supply lines. Using a torch, look for any droplets or moisture around these areas.

    Step 3: The Dye Test

    If you’re still struggling to find the leak, a common trick is the dye test. Fill the sink with water, add a few drops of food colouring, and wait. If there’s a leak, the coloured water will make it easier to spot.

    What to Do if You Find a Leak

    Spotted a leak beneath your bathroom sink? That’s your cue to roll up your sleeves and dive right into action. There’s no time like the present to kick that leak to the kerb!

    Small leaks may be manageable with a DIY approach, but for anything larger or more complex, we strongly recommend seeking professional assistance. Visit our services page to see how we can help.

    When to Call a Professional

    Sometimes a leak might be too complex for a DIY solution. If the leak is persistent, you’re unable to identify the source, or you feel uncomfortable attempting repairs, it’s best to call in a professional. Aquatrade Plumbing’s skilled team is always ready to assist you with any plumbing emergencies. Book your free onsite quote!

    Preventive Measures

    When it comes to plumbing, an ounce of prevention is worth a pound of cure. Heading off a problem before it starts can save you a heap of time, not to mention the headache of dealing with a full-blown plumbing predicament.

    Regular maintenance and inspections can help prevent leaks from occurring in the first place.

    Consider incorporating the following preventative measures:

    Regularly Inspect Your Sink and Plumbing

    It’s a good practice to check your sink and associated plumbing regularly. This includes checking for any loose connections or signs of wear and tear. A routine visual inspection can go a long way in preventing leaks. You should also look out for decreased water pressure, as it may indicate a potential leak.

    Replace Aged Components

    Like any other household items, the components of your sink and plumbing also have a lifespan. The average lifespan of sink components varies from 5 to 15 years, depending on the quality and maintenance. Make it a habit to replace these components before they wear out.

    Professional Inspection

    A professional inspection by a licensed plumber can help identify potential issues before they turn into costly repairs. They can assess the overall health of your plumbing system and suggest necessary repairs or replacements.

    Handling the Leak: Step-by-Step Guide

    Let’s tackle that tricky bathroom sink leak, one step at a time.

    Step 1: Stop the Flow

    The moment you spot that unwelcome leak, it’s time to halt the water in its tracks. Your first task is to turn off the water supply. Look for the shut-off valve – it’s typically tucked away on the wall underneath your sink. No time to waste – let’s stop that leak from becoming a waterfall!

    Step 2: Place a Bucket Underneath

    Place a bucket or container underneath the leak to prevent water from spreading and causing more damage.

    Step 3: Tighten Connections

    If the leak is coming from a loose connection, try tightening it with a wrench. Be careful not to over-tighten, as this can cause more harm than good.

    Step 4: Replace Damaged Components

    Stumbled upon a worn-out washer or a corroded pipe? If you’ve discovered a faulty component, it’s time for a bit of a swap. Don’t fret about finding replacement parts. Just pop into your nearby hardware store where you’ll find aisles chock-full of the bits and bobs you need. It’s like a treasure hunt, but instead of a pirate’s gold, you’ll be nabbing the tools to conquer that irksome leak!

    Be prepared to wave goodbye to that pesky leak!

    Step 5: Test the Sink

    Once you’ve made the necessary repairs, turn the water supply back on and test your sink. If the leak persists, it’s best to seek help from a professional plumber.

    While these steps may help with minor leaks, a larger or more complex leak will likely require professional assistance. Here at Aquatrade Plumbing, we are always ready to assist with any plumbing issue.

    Leaky taps and pipes might seem small-time offenders, but if left unchecked, they can quickly escalate into major culprits causing water damage, compromising structural integrity, and even triggering nasty mould growth. The moment you spot a leak, it’s crucial to leap into action. Don’t let a drip become a deluge!


    Detecting and nipping leaks in the bud is critical to stave off further damage and sidestep hefty repair bills. Stumbled upon a leak lurking beneath your bathroom sink? It’s time to swing into action immediately.

    Whether you’re ready to don your DIY hat or reckon it’s time to enlist the big guns for some professional prowess, you’ve got a steadfast ally in Aquatrade Plumbing. No matter what plumbing curveball comes your way, we’re with you at every twist and turn.

    Remember, help is just a call or a click away. Need a little assistance? Please don’t hesitate to give us a shout. Check out the Australian Government’s Home Improvement Tips and Water Efficiency Guide for more information on dealing with leaks. We’re always here for you, ready to lend a hand when you need it.

    Frequently Asked Questions

    The most common reasons are a loose connection, corrosion, or a damaged component in the sink drain or the water supply lines.

    Absolutely. A leaking pipe can lead to water damage, structural damage, and potentially harmful mould growth if not addressed promptly.

    The cost can vary depending on the cause and extent of the leak. For a professional quote, visit our quote request page.

    Got a wee leak on your hands? You might be able to tackle it yourself with a spot of DIY. But if you’re dealing with something more substantial or intricate, it’s wise to hang up your tool belt and call in the pros. They’ll have that leak sorted in a jiffy!

    Scroll to Top