Plumbing Basics
Plumbing issues are among the most common headaches for homeowners, but they don’t always require an expensive service call. Many plumbing systems in residential homes operate on simple principles of pressure, gravity, and water flow. Understanding these basics can empower you to handle minor repairs confidently.
Common problems like a dripping tap, a running toilet, or a slow drain are often caused by small, inexpensive parts wearing out—like a rubber washer or a plastic flapper. With the right guidance, these fixes are straightforward, safe, and satisfying.
However, plumbing also involves water, which can cause significant damage if mishandled. Our guides are designed to help you distinguish between a simple DIY fix and a situation that demands a professional. By tackling the basics yourself, you save money and maintain your home’s value, while knowing exactly when to pick up the phone for expert help.
Common Plumbing Problems
Leaky Tap
Easy
A dripping tap is one of the most common and annoying plumbing issues. It wastes water and increases utility bills. This is typically caused by worn-out internal parts like washers, O-rings, or seals that degrade over time.
When to Call a Pro:
Call a professional if the tap body is cracked, if you cannot isolate the water supply, or if replacing the internal components does not stop the leak.
Running Toilet
Easy
If your toilet tank constantly refills or hisses, it’s wasting huge amounts of water. The culprit is often a faulty flapper valve that doesn’t seal properly, a float that is set too high, or a refill tube that is too long.
When to Call a Pro:
Call a plumber if the toilet continues to run after replacing the flapper and fill valve, or if you notice water leaking from the base of the toilet onto the floor.
Clogged Drain
Easy
Sinks and tubs often drain slowly due to hair, soap scum, and debris buildup. Before using harsh chemicals, manual methods like plunging or using a drain snake are safer for your pipes and often more effective.
When to Call a Pro:
Call a pro if the clog is persistent after multiple attempts, if multiple fixtures are clogged simultaneously (indicating a main line issue), or if water backs up into other fixtures.
Low Water Pressure
Easy
Weak flow from a specific tap usually indicates a clogged aerator due to mineral deposits. Cleaning or replacing the aerator is a simple fix. If it affects the whole house, it could be a regulator issue.
When to Call a Pro:
Call a plumber if low pressure affects the entire house, if it occurs suddenly, or if you suspect a hidden leak or issue with the main water supply line.
Dripping Pipes
Medium
Pipes under sinks can drip at the joints if connections are loose or if the plumber’s tape has worn out. Tightening the nut or replacing the seal often resolves this.
When to Call a Pro:
Call a professional immediately if the pipe itself is corroded or cracked, or if tightening the fittings does not stop the leak.
Leaky Sink Cabinet
Medium
Water pooling inside your sink cabinet can damage wood and encourage mould. This often comes from a loose drain connection, a faulty basket strainer seal, or a supply line leak.
When to Call a Pro:
Call a plumber if you cannot locate the source of the leak, or if the cabinet wood is rotting significantly and requires structural repair.
Slow Shower Drain
Easy
Standing in ankle-deep water during a shower is unpleasant. Hair and soap accumulation in the trap is the usual suspect. A specialised zip-it tool or a snake can pull out the blockage.
When to Call a Pro:
Call a pro if cleaning the trap doesn’t work, as the blockage might be further down the branch line or in the main stack.
Water Hammer Noise
Medium
Loud banging noises when you shut off a tap (water hammer) happen when fast-moving water stops suddenly. Installing water hammer arrestors or securing loose pipes can help dampen the shock.
When to Call a Pro:
Call a professional if the banging is severe and constant, as it can damage pipe joints and lead to leaks over time.
Frozen Pipes
Medium
In cold weather, water in pipes can freeze and expand, risking a burst pipe. Prevention involves insulation, but if they freeze, careful thawing with a hair dryer (never an open flame) is required.
When to Call a Pro:
Call a plumber immediately if a pipe has already burst, if you cannot access the frozen section, or if you are unsure how to safely thaw them.
Burst Hose Connections
Easy
Washing machine or garden hoses can burst under pressure if they are old or kinked. Replacing rubber hoses with braided steel hoses is a proactive safety upgrade.
When to Call a Pro:
Call a pro if the shut-off valve behind the appliance is stuck or leaking, preventing you from safely changing the hose.
Toilet Running Constantly
Easy
A “phantom flush” or constant running can be caused by a slow leak from the tank to the bowl. This is different from a running refill valve and usually points to a warped flapper seat.
When to Call a Pro:
Call a plumber if the porcelain tank is cracked or if replacing the entire flush valve mechanism seems too complex.
Aerator Cleaning
Easy
If your tap sprays water erratically, the aerator screen is likely blocked with sediment. Unscrewing it and soaking it in vinegar is a quick and satisfying maintenance task.
When to Call a Pro:
Call a pro if the aerator is seized and won’t unscrew, as excessive force can damage the tap spout.
P-Trap Issues
Easy
The U-shaped pipe under the sink traps sewer gases but can also trap debris or leak. Removing and cleaning it is a standard fix for clogs and retrieving dropped items.
When to Call a Pro:
Call a plumber if the P-trap metal is corroded through, or if the wall arm (pipe going into the wall) breaks off.
Water Stains Under Sink
Medium
Old stains might indicate a past leak, but wet spots mean an active one. Trace the water path—it could be a supply line, the drain seal, or the tap base.
When to Call a Pro:
Call a pro if the leak originates from behind the wall or if mould growth is extensive.
Tools You’ll Often Need
Plunger (Cup & Flange)
Essential for clearing clogs. A cup plunger is for sinks, while a flange plunger is designed for toilets.
Adjustable Wrench
Used for tightening and loosening hexagonal nuts on supply lines and compression fittings.
Pipe Wrench
Heavy-duty tool with serrated teeth for gripping round iron or galvanised steel pipes.
Drain Snake (Auger)
A flexible coil that reaches deep into pipes to physically break up or retrieve tough clogs.
Plumber’s Tape
Also known as PTFE tape, it seals threaded pipe connections to prevent leaks.
Bucket & Towels
Never start a plumbing job without these to catch residual water and clean up spills immediately.
Safety Notes: Read Before You Start
Plumbing safety begins with one golden rule: Turn off the water supply. Before you unscrew a single nut, ensure the water is shut off at the fixture valve or the main house valve. Test the tap to confirm the flow has stopped.
Know your limits with gas and sewage. We do not cover gas line repairs because they carry a risk of explosion and carbon monoxide poisoning. If your water heater is gas-powered, exercise extreme caution or hire a professional for pilot light or burner issues. Similarly, main sewer line backups involving raw sewage are biohazards that require professional equipment.
Digging risks. If your plumbing issue requires digging outside (like a main line leak), you must check for underground utility lines first. Hitting a gas or power line can be fatal.
When to call a pro: If you see rapid flooding, suspect a gas leak (smell of rotten eggs), or notice signs of structural damage (sagging floors around a leak), stop immediately and call a licensed professional.