Hair, cooking grease, food scraps, wet wipes, tree roots and outdoor debris are common causes of blocked drains. Damaged or poorly installed pipework can also restrict flow, which means some recurring blockages need repairs rather than another round of cleaning.
The best prevention starts with keeping unsuitable materials out of your drains and investigating changes before water stops flowing altogether. At Maxey Plumbing and Gas, we help Wellington homeowners identify what is causing a blockage and work out how to reduce the chance of it returning.
Hair and Soap Build-Up in Bathroom Drains
Hair can collect around shower wastes, bath outlets and basin fittings. As strands become tangled with soap residue and other debris, they can form a blockage that gradually slows drainage. You might first notice water pooling around your feet in the shower or taking longer to leave the basin.
Use a suitable hair catcher and empty it regularly. Remove visible hair from accessible drain covers before it washes further into the pipe, and wipe shaving hair into the rubbish rather than rinsing it down the basin.
If cleaning the accessible cover does not improve drainage, the blockage may be further along the pipe. Avoid forcing improvised tools into the opening, as you could damage fittings or push material deeper. A shower that repeatedly blocks needs its underlying cause investigated rather than relying on surface cleaning alone.
Cooking Grease and Food Scraps in Kitchen Drains
Cooking fat, oil and grease can coat the inside of wastewater pipes and bind with other material. Over time, this build-up restricts the space available for water to pass through. Running hot water or adding dishwashing liquid does not make pouring grease down the sink a reliable disposal method.
Let leftover cooking fat cool, then collect it in a suitable container for disposal according to your local waste guidance. Wipe greasy pans and plates with a paper towel before washing them. Do not pour oil onto the lawn or into an outdoor drain.
A sink strainer also helps catch food scraps before they enter the pipe. Empty it into the appropriate waste bin, and keep coffee grounds, rice and other food waste out of the sink. Even small amounts can contribute to build-up when they repeatedly enter a drain containing grease.
If your kitchen sink keeps draining slowly despite these habits, arrange an assessment. The problem could involve an existing accumulation further down the line rather than material caught directly beneath the sink.
Wet Wipes and Other Items Flushed Down Toilets
Toilets are designed to carry human waste and toilet paper. Wet wipes, nappies, sanitary products, cotton buds, dental floss and paper towels belong in the rubbish.
Wipes marketed as “flushable” can still contribute to blockages because they do not break down like toilet paper. They may catch on rough pipe surfaces or combine with grease and other debris further along the wastewater system.
Keep a rubbish bin beside the toilet so everyone has a convenient alternative. Explain the rule to children and visitors, and avoid flushing large quantities of toilet paper at once. Toilet paper is suitable for flushing, but that does not mean a toilet can handle unlimited amounts.
If the water level rises unusually high after flushing, do not keep flushing to see whether it clears. You could cause an overflow. Stop using the affected toilet and seek advice if the blockage does not resolve.
Dealing with a slow sink, blocked toilet or recurring backup? Ask about our blocked drain services in Wellington or call 04 390 0135 for urgent problems.
Tree Roots in Underground Drains
Tree roots can enter underground drains through cracks, faulty joints or other openings. Once inside, they can restrict flow and catch material travelling through the pipe.
Root intrusion is one possible explanation for a drain that repeatedly blocks after being cleared. However, a wet patch on the lawn does not prove roots are responsible. Surface drainage problems, leaking water pipes and other faults can produce similar symptoms.
Where roots or pipe damage are suspected, a CCTV inspection can help establish what is happening inside the drain. Clearing roots may restore flow, but an opening in the pipe can allow them to return. Depending on the findings, further repair may be needed.
Before planting trees near known drainage routes, consider their mature size and root growth. If you already have a recurring problem near established trees, get the drain assessed before deciding that tree removal is the answer.
Leaves, Silt and Stormwater Debris
Outdoor stormwater drains can become obstructed by leaves, soil, twigs and other debris. When rain arrives, restricted inlets or pipes may leave water pooling on paths, driveways or near the house.
Keep accessible grates clear and remove collected leaves rather than washing them into the drain. Check these areas after windy weather and before forecast heavy rain, provided conditions are safe. Gutters and downpipes also need attention, as debris from the roof can contribute to drainage problems.
Stormwater and wastewater serve different purposes. Stormwater drainage carries rainwater, while wastewater drainage takes water from toilets, sinks and other household fixtures. Downpipes should not be diverted into wastewater gully traps.
If clearing surface debris does not resolve pooling, there may be a blockage further along the pipe or another drainage issue.
Damaged or Poorly Installed Pipework
Some blockages happen because the pipe itself is no longer functioning properly. Cracks, displaced joints, collapsed sections or an unsuitable gradient can create places where waste collects.
These problems cannot be prevented simply by changing what goes down the drain. If the same line repeatedly blocks, explain its history when booking a visit, including previous clearing work and how quickly the symptoms returned.
An assessment can help distinguish between a removable obstruction and a structural fault. The aim is to address the cause rather than repeatedly paying to clear the same symptoms.
When Should You Call a Plumber?
Arrange a visit when drainage stays slow, blockages keep returning, or several fixtures are affected together. Gurgling, unpleasant smells and water backing up elsewhere in the house are also worth investigating, although none identifies the cause on its own.
If wastewater is overflowing, stop using the affected fixtures, keep people and pets away from the area, and call promptly. Avoid mixing drain-cleaning products. If you have already used one, tell the plumber what it was before work begins.
For help identifying and resolving a blocked drain, call Maxey Plumbing and Gas on 04 390 0135 or request a service online. Tell us which fixtures are affected, when the problem started and whether it has happened before.
