Updated October 2026
Narraweena is a hilltop suburb of family homes, much of it built in the postwar decades, with brick and fibro houses on sloping blocks and bushland reserves on the edges. Many of those homes are now on their second or third renovation, but the drains under them are often original. Beaches Blocked Drains connects Narraweena residents with licensed local drain plumbers.
Why Narraweena drains block
Clay pipe and clay soil are a tough combination. Sewer lines from that era were usually earthenware, laid in short jointed sections. Clay-heavy soils swell when wet and shrink in dry spells, and that seasonal movement slowly pulls joints apart. Once a joint opens, roots from gardens and reserves find it.
The slopes add stormwater problems. Water runs off the high streets quickly, and pits and lines on the low side of each block collect soil and leaves.
Common causes in Narraweena
- Roots in clay sewer joints, often worse after a wet spell
- Cracked or displaced joints from soil movement
- Old stormwater pits filled with silt and leaves
- Renovated kitchens and bathrooms adding load to an old line
- Wipes and sanitary items in toilets
How it gets fixed
The plumbers we refer usually start with a CCTV drain camera, because a joint pulled apart by soil movement needs a different fix from a simple root blockage. Jet blasting clears roots and debris. Where joints have separated or cracked, pipe relining seals them and stops roots getting back in.
What it costs
A standard clear typically runs $150 to $400. Tree roots in drains clearing typically runs $250 to $600. Relining typically costs $3,000 to $8,000 or more depending on length. You get a price before any work.
Frequently asked questions
Why does our drain block after rain and then clear?
Wet soil swells and can push joints out of line, and rain raises the water in the ground around the pipe. A camera inspection usually shows a joint that opens and closes with the seasons.
Is it the house or the soil that cracked our pipe?
Usually the soil. Reactive clay moves with moisture, and rigid clay pipe cannot flex with it. Relined pipe is jointless, so it copes better.
Can we manage roots without relining?
If the pipe is still sound, scheduled clearing can work. If joints are cracked, the roots will keep coming back and relining is usually the better long-term spend.