Tap repairs, toilet replacements, pipe work, bathroom renovations and everyday plumbing maintenance across Northern Sydney. Licensed, insured, and guaranteed.
General plumbing is the broad category of everyday plumbing work that keeps residential and commercial properties functioning. It includes everything from a dripping tap to a full bathroom renovation — any work on water supply pipes, drainage, fixtures, fittings, and appliances that is not classified as specialist (gas fitting, roofing, or fire services).
In Northern Sydney, the most common general plumbing jobs we attend are leaking taps, running toilets, burst pipes, blocked fixtures, tap and mixer replacements, toilet replacements, water pressure issues, pipe repairs, washing machine and dishwasher connections, and bathroom/laundry/kitchen plumbing fit-offs during renovations.
A dripping tap wastes up to 20,000 litres of water per year and increases your water bill by $50–$100+ annually. More importantly, a drip that is ignored often indicates a failing valve seat or worn cartridge that will eventually fail completely — turning a $120 repair into a $300+ emergency.
We repair all tap types: traditional washer taps (compression), ceramic disc taps, quarter-turn taps, and single-lever mixer cartridges. Where the tap body is corroded, seized, or obsolete (parts no longer available), we recommend replacement with a quality unit that will last 15–20 years.
Common mixer brands we service and install in Northern Sydney include Caroma, Dorf, Methven, Phoenix, Grohe, and Moen. We carry the most common washers, O-rings, cartridges and spindles on the van for same-visit repair.
A running toilet can waste 60,000–90,000 litres per year — far more than a dripping tap. The most common causes are a worn inlet valve (fill valve), a degraded outlet valve (flush valve seal), or a faulty cistern button mechanism. All are repairable in a single visit.
Where the toilet suite is cracked, heavily stained, or uses an obsolete cistern mechanism (common in pre-2000 homes across Wahroonga, Turramurra and Gordon), replacement is more cost-effective than ongoing repairs. We supply and install Caroma, Duravit, and Villeroy & Boch suites — including back-to-wall, wall-hung, and close-coupled configurations — with WELS 4-star water efficiency ratings.
Northern Sydney's established suburbs — Wahroonga, Turramurra, Gordon, Pymble, Killara — contain many homes built in the 1950s–1970s with galvanised steel water supply pipes that corrode internally over time. Homes from the 1970s–1990s may have copper pipes with pinhole corrosion, particularly where water chemistry is aggressive.
We repair individual pipe failures (burst sections, pinhole leaks, corroded fittings) and provide full or partial repiping where the system is beyond economic repair. Repiping typically uses cross-linked polyethylene (PEX) or copper — PEX is faster to install, corrosion-resistant, and carries a 25-year product warranty.
| Pipe Material | Common in Homes Built | Typical Lifespan | Common Failure Mode |
|---|---|---|---|
| Galvanised Steel | Pre-1980 | 30–50 years | Internal corrosion, rust, restricted flow |
| Copper | 1960–2000 | 40–70 years | Pinhole corrosion, joint failures |
| PEX (Cross-linked Polyethylene) | 2000–present | 50+ years | UV degradation if exposed (rare) |
| PVC/uPVC (drainage only) | 1970–present | 50–100 years | Joint failures, tree root intrusion |
Whether you are renovating a bathroom, upgrading a laundry, or fitting off a new kitchen, the plumbing rough-in and fit-off must be done correctly the first time. Incorrect pipe sizing, inadequate fall on drainage, or poorly positioned outlets create problems that are expensive to fix once tiling and cabinetry are complete.
We work with builders, bathroom designers and homeowners in Northern Sydney to provide plumbing rough-in (first fix — pipe runs before lining), and plumbing fit-off (second fix — connecting fixtures, mixers, toilets, vanities, baths, showers, dishwashers and washing machines after tiling).
Low water pressure is a common complaint in Northern Sydney — particularly in elevated suburbs like Wahroonga, Mt Colah and Berowra where gravity-fed supply from Sydney Water reservoirs can result in marginal pressure. Causes include corroded galvanised pipes restricting flow, a partially closed main stopcock, a faulty pressure-limiting valve (PLV), or issues with the Sydney Water main.
We diagnose pressure issues by testing at the meter, at the PLV, and at individual fixtures to isolate whether the problem is on the Sydney Water side or within your property. Solutions range from adjusting or replacing the PLV ($180–$350) to partial repiping of corroded sections.
Typical cost ranges for common general plumbing jobs in Northern Sydney (GST-inclusive estimates):
| Service | Cost Range | What's Included |
|---|---|---|
| Leaking tap repair | $120 – $250+ | Diagnosis, washer/cartridge/spindle replacement, test |
| Mixer tap replacement (supply + install) | $250 – $500+ | New mixer, removal of old, connection, leak test |
| Running toilet repair | $120 – $250+ | Inlet valve, outlet valve or button mechanism replacement |
| Toilet suite replacement (supply + install) | $550 – $1,200+ | New suite, removal of old, connection, seal, test |
| Burst pipe repair | $250 – $600+ | Isolation, pipe repair/replacement, pressure test |
| Pressure-limiting valve replacement | $180 – $350+ | New PLV, adjustment to correct pressure, test |
| Bathroom plumbing rough-in | $2,000 – $5,000+ | All pipe runs, drainage, venting — ready for lining |
| Plumbing maintenance inspection (residential) | $180 – $350+ | Full property inspection, hot water, taps, toilets, drainage check, written report |
Source: O'Brien Plumbing cost guide (obrien.com.au). On-site diagnostic included. Fixed prices confirmed before any work starts. 7-year workmanship warranty on all labour.
Our general plumbing process is designed to be thorough, efficient and respectful of Northern Sydney homes — whether it’s a Federation bungalow in Wahroonga, a 1960s brick in Thornleigh or a high-density unit in Hornsby. We combine proven diagnostic methods, specialist equipment and a clear communication process so you know what’s happening at each step.
Call our Hornsby office on (02) 9477 1519 or use our online booking. Our team will gather details about the problem, the property type (residential or strata), access constraints (steep driveways, gated properties, heritage considerations) and any immediate hazards (gas smell, ongoing leaks, burst pipe). We operate 24/7 for emergencies.
When we arrive we charge a standard diagnostic/attendance fee of $180 (inc GST). This covers travel from our Hornsby base, a full-site safety review, standard leakage detection and a professional assessment. We document existing conditions with photos where appropriate and explain initial findings on-site.
Safety is central. Our plumbers are licensed and insured, carry a gas-fitting licence where needed, and follow our 17 Safe Work Method Statements (SWMS). On arrival we install dust mats, use drop sheets, isolate services safely and establish work zones to protect heritage finishes, mature gardens and valuable landscaping common across Northern Sydney.
We use targeted tools to get to the root cause with minimal disruption:
Once we diagnose the problem we provide a clear scope of work and an upfront fixed price before any repair begins. For more complex jobs (strata approvals, heritage-safe work, deep excavation) we outline staged options with estimated timeframes and any additional permits required.
Most general plumbing repairs are completed same-visit provided parts are available and no specialised approvals are required. Only once you authorise the work do we proceed — we never start without your sign-off.
Repairs are completed using the appropriate technique for the asset:
We tidy the work area, remove waste materials and provide a written invoice and a clear summary of the work done, parts used and any follow-up recommendations. For recurring issues we offer a maintenance plan tailored to Northern Sydney properties.
We stand behind our work. Where a manufacturer’s warranty applies for supplied parts we document that for you. We also explain ongoing care and advise on any future preservation work — for example, root barriers or planned replacement of ageing galvanised piping in 1950s–1970s homes.
Knowing the early warning signs helps prevent costly damage — particularly in Northern Sydney where mature gardens, older pipework and steep, sandstone blocks create specific vulnerabilities. Watch for the following:
Steady drips may seem minor but waste water and eventually wear seals. A dripping kitchen mixer or laundry tap is a common call-out — left unattended it can lead to corrosion, staining and higher bills.
A running cistern can indicate a faulty flapper, worn inlet valve or sediment in older systems. In heritage and older homes, replacement parts can be non-standard; professional diagnosis prevents repeated fixes.
Low pressure can be caused by blocked aerators, failing pressure regulators, corroded supply lines or mains issues. In Northern Sydney, root ingress into older pipes and partial blockages from sediment are common causes.
Slow drainage often signals a partial obstruction in the kitchen sink or sewer main. Gurgling toilets indicate air trapped behind blockages — in properties with large trees, root invasion of sewer lines is frequent.
Sub-surface leaks can saturate garden beds or driveways and cause structural issues on steep sandstone blocks. A rising bill without visible cause needs immediate attention — it may be an underground leak or a hidden burst pipe.
Pipes at the end of their life (copper or galvanised pipework in mid‑20th century homes) are more likely to fail. Sudden temperature changes and ground movement on sloping blocks can cause splits.
Strong vibration or banging when taps are turned off usually indicates water hammer — caused by air or unsupported pipework. This is more common where hot and cold runs are long, such as large Northern Sydney properties.
If you smell sewage or suspect water contamination after storms, your backflow prevention device may have failed. Properties on steep blocks and those with irrigation systems or pool connections require validated backflow protection.
Failed isolation valves are a common problem in older plumbing systems. If you can’t isolate water to a zone, it makes repairs more invasive and costly — replacing isolation valves proactively avoids emergency shutdowns.
We believe transparent pricing begins with a clear diagnostic step. Our standard diagnostic and attendance fee is $180 (inc GST). This fee covers the initial site inspection, a safety check, basic leak detection and an on-site professional assessment.
Beyond the diagnostic fee, pricing for the repair or maintenance work depends on a small set of predictable factors. We always provide a fixed, upfront price once we’ve diagnosed the issue — you approve before work begins.
After diagnosis we will give you:
If you need a written quote for strata or insurance claims, we supply a formal quotation and photographic evidence of the fault and rectification works.
General plumbing services share core techniques across residential and commercial work, but the approach, regulations and scope often differ substantially — especially in Northern Sydney where residential heritage homes sit beside commercial strata buildings.
Whether you’re a homeowner with a leaking tap or a strata manager managing multiple sites across Hornsby and surrounding suburbs, our team adapts the scope, communication and documentation to the client’s needs.
Northern Sydney properties face unique challenges: mature trees with aggressive roots, older pipework in homes built during the 1950–1970 period, and steep sandstone blocks that complicate drainage. These targeted prevention measures reduce emergency calls and extend the life of your plumbing.
Annual checks catch early corrosion, partial blockages and failing isolation valves. For older homes consider twice-yearly inspections to monitor pipes approaching end-of-life.
Have sewer lines camera-inspected if you have large trees near sewer runs. Early installation of root barriers, targeted pruning and, if necessary, root removal treatments reduce repeated excavation repairs.
Heavily treed properties collect leaf litter quickly. Keep gutters and downpipes clear to prevent overflow and erosion on sloping blocks — this reduces water pooling near foundations and keeps stormwater lines clear.
Properties built in the mid-20th century often have pipework nearing the end of service life. Planned replacement prevents sudden bursts; upgrade to modern materials in stages if budget requires.
Long runs in large Northern Sydney properties can develop water hammer. Installing arrestors and securing loose pipework prevents damage and noise.
If you have irrigation systems, pools or commercial cross-connections, arrange certified backflow testing to protect your potable water — our team uses calibrated backflow test kits and issues compliant reports.
When planning gardens, avoid planting large root‑structure species near sewer and stormwater mains. Where planting is unavoidable, install physical root barriers during planting.
Clearly labelling your home’s isolation valves and testing them annually makes it easier to isolate leaks quickly. Replace stiff or seized valves before an emergency occurs.
For older or heritage-listed properties in areas like Wahroonga or Hornsby, consult a plumber experienced with sympathetic repair techniques so replacement work blends with original fabric and approvals are met.
We use a curated set of specialist tools aligned with modern plumbing practice and the demands of Northern Sydney properties. Each piece of equipment is chosen to increase diagnostic accuracy, reduce disruption and deliver durable repairs.
CCTV inspection lets us see the inside of your sewer and stormwater pipes without excavation. It’s essential for diagnosing root intrusion, collapsed sections and sediment build-up. This non‑destructive approach saves time and costs by targeting repairs precisely.
For durable connections and rapid on-site assembly, we use threading and pressing tools appropriate to the material. Press systems are particularly effective for copper and stainless steel, providing strong, leak-free joints quickly.
Accurate pressure measurement is the first step in diagnosing low-pressure complaints or water hammer. Gauges allow us to determine if a regulator needs replacement or if there’s a supply-side issue.
Certified backflow test equipment lets us confirm protection against contamination and issue compliant test reports for strata and council requirements.
Pipe freezing allows us to isolate a short section of pipe for repair without shutting the building’s entire water supply. This is particularly useful in multi‑unit buildings or where a single service shutdown would cause major disruption.
For permanent joins on copper systems we carry professional soldering and brazing gear to deliver high-integrity joints that meet plumbing standards.
All equipment is maintained to trade standards and operated by licensed technicians. Using specialist diagnostics and repairs reduces repeated call-backs and produces longer-lasting outcomes — a practical benefit for properties with steep access and mature landscaping.
Choosing an experienced partner matters in Northern Sydney where the geography, trees and older building stock create unique plumbing challenges. Here’s what sets O'Brien apart:
We are both a plumbing and roofing contractor. Many plumbing issues are linked to roof and stormwater performance — blocked gutters, downpipe failures and stormwater overflow. Our ability to diagnose and repair across both disciplines means one contractor can manage linked problems efficiently and safely.
Our tradespeople are fully licensed and insured. We hold gas fitting qualifications for gas appliance connections and service work.
We follow 17 Safe Work Method Statements which cover the common high-risk tasks we encounter on Northern Sydney sites — from steep roof access to confined-space sewer works. This reduces risk to your property and our team.
Plumbing emergencies don’t wait for business hours. We operate around the clock from our Hornsby base to respond promptly.
Our diagnostic/attendance fee of $180 (inc GST) provides a clear starting point for any job. After diagnosis we give an upfront quote — no surprises and no work without your approval.
We know the area — from Wahroonga’s heritage homes to Hornsby’s strata buildings and Brooklyn’s riverside sites. That local knowledge informs practical solutions that respect gardens, sandstone blocks and access constraints.
We are actively pursuing ISO 9001 certification which reflects our commitment to continual improvement and consistent service delivery.
Most general plumbing repairs are completed the same visit, with our trades carrying commonly required parts and the tools needed for a durable fix.
We charge a diagnostic/attendance fee of $180 (inc GST) for the initial assessment. After diagnosing the problem we provide an upfront fixed quote for the repair. Final cost depends on access, parts and regulatory requirements. We never begin work without your authorisation.
Yes. We have experience working sensitively on heritage-listed and older Northern Sydney homes. We adopt methods that minimise disturbance to original materials and provide documented repair plans where required for council or heritage approvals.
Isolate the water supply at the nearest practical isolation valve if safe to do so, turn off the mains if you cannot locate a local isolator, and call our emergency line. We provide 24/7 response and will advise temporary measures over the phone until we attend.
Backflow devices typically require annual testing, though local council or strata rules may set different intervals. We use calibrated backflow test kits and provide compliant certificates for your records.
Yes. We diagnose using water pressure gauges to determine whether the issue is a local fixture, pressure regulator, supply mains or partial blockage. Once identified we recommend the least disruptive and most reliable fix.
Not always. We use pipe cameras to pinpoint faults and pursue trenchless options where practical. However, when structural repair or replacement of sections is required, excavation may be necessary. We explain all options and restoration approaches beforehand.
Pipe freezing forms a temporary ice plug in a pipe so a small section can be isolated for repair without shutting the entire system. It’s useful for multi-unit buildings or where shutting the mains is impractical. We use this technique when it’s the safest and most efficient option.
We inspect the line with a camera to determine the extent of intrusion. For minor root ingress we can remove roots and apply targeted root control. For severe or recurring problems we recommend repair or replacement of the affected pipe section and installing root barriers or re-routing lines where possible.
Yes. We offer planned maintenance tailored to Northern Sydney properties — covering regular inspections, backflow testing, gutter and downpipe checks and priority emergency response. Regular maintenance reduces the likelihood of disruptive failures, especially on steep and heavily treed blocks.
Our team is fully licensed and insured. We hold a gas fitting licence for relevant works, operate under 17 SWMS for high-risk tasks and are actively pursuing ISO 9001 certification to formalise our quality systems.
Based in Hornsby, our team provides general plumbing services across Northern Sydney with local knowledge of the specific challenges each suburb presents. Call (02) 9477 1519 to book an inspection.
Local base with quick response times. We handle everything from routine tap repairs to complex strata systems in Hornsby’s mixed residential and commercial precincts.
Large blocks and bushland proximity mean root issues and access considerations are common — we plan works to protect mature gardens and manage water runoff on sloping sites.
Mature treed lots and older home stock make proactive sewer checks and gutter maintenance important in Mt Colah.
Steeper blocks and sandstone outcrops are common. We design drainage solutions that respect the site and minimise erosion.
From apartment complexes to detached homes, we provide residential and strata plumbing support with documented reporting for building managers.
Older houses in well-established gardens often need staged pipe replacement or targeted root management — we help plan long-term asset renewal.
Thornleigh’s varied terrain requires careful access planning for larger repairs — we assess logistics as part of our diagnostic visit.
Steep blocks and extensive stormwater systems demand robust maintenance; we implement effective guttering, downpipe and stormwater solutions.
Heritage homes and high-value gardens call for sensitive plumbing interventions — we balance modern standards with preservation of original fabric.
Properties near waterways require careful management of stormwater and sewer systems; we assess tidal or flood implications when relevant.
If your suburb is nearby and not listed, we likely still service your property from Hornsby. Contact us on (02) 9477 1519 for confirmation and rapid response.
O'Brien Plumbing & Roofing combines plumbing and roofing expertise, a commitment to safety and a practical, local approach to Northern Sydney plumbing challenges. For reliable diagnosis and upfront pricing, call (02) 9477 1519 to book a $180 (inc GST) diagnostic and get the problem identified and fixed the right way.
A leaking tap repair typically costs $120–$250+ depending on the tap type and whether parts need to be sourced. We carry common washers, cartridges and spindles on the van for same-visit repair.
We send a qualified technician to diagnose the issue on site. You receive a fixed-price quote before any work begins — no surprises. Our diagnostic process identifies the exact cause so you can make an informed decision.
Yes. We provide full and partial repiping using PEX (cross-linked polyethylene). PEX is corrosion-resistant, faster to install than copper, and carries a 25-year product warranty.
We provide the plumbing component of bathroom renovations — rough-in (first fix pipe runs) and fit-off (second fix fixture connections). We work alongside your builder or can recommend trusted renovation partners in Northern Sydney.
We cover Hornsby, Wahroonga, Turramurra, Gordon, Pymble, Killara, Lindfield, Roseville, Asquith, Mt Colah, Berowra, Thornleigh, Pennant Hills, Normanhurst, Waitara, Cherrybrook and surrounding areas.
Need a Plumber in Northern Sydney?
Same-day service for most repairs. Fixed-price quotes before work begins. Call (02) 9477 1519 or book online.