Pipe Repairs & Replacement Cardiff
Copper, Plastic, Lead & Concealed Pipework
Whether you’ve got a slow leak under the kitchen floor, a burst pipe in an upstairs bathroom, or a Victorian property still running on lead supply, we handle it all.
Book an Engineer →Your Local Plumber in Cardiff
From pinhole leaks in old copper to full lead pipe replacements, our local Cardiff plumbers cover every type of pipework.
Gas Safe Registered (518700)
NJ Harkus is Gas Safe registered (518700), City & Guilds qualified and CIPHE members, with full public liability insurance for all plumbing, heating and gas work.
Highly Recommended & Reviewed
We’re trusted with pipework repairs and replacement on all types of properties, from family homes and rental properties to busy commercial premises.
Complete Pipework Services
Repairs, Replacements & Upgrades
Our team handles every type of pipework, whether you’re dealing with a sudden leak that requires an emergency plumbing call-out or planning a wider upgrade.
From copper and plastic to lead replacement and concealed repairs, we cover the full range of pipework needs across homes, rental properties, and commercial premises in Cardiff.
Our pipework services include:
- Leak detection and repair (pinhole and concealed leaks)
- Burst and frozen pipe repair
- Lead and galvanised pipe replacement
- Copper, plastic, and push-fit pipework (Speedfit, Hep2O)
- Full and partial repipes
- Pipework rerouting for kitchen and bathroom renovations
- Mains supply pipe repairs and upgrades
- Condensate, overflow, and external pipework
- Stopcock and isolation valve replacement
- Pipe insulation and lagging to prevent winter damage
Book Your Pipework Repair or Replacement
Pipework Services Across The City & Nearby
We provide pipework repairs and replacements across Cardiff and the surrounding areas, including Penarth, Sully, Barry, Cowbridge, Pontyclun, Llantrisant, and Dinas Powys. From terraced houses in Pontcanna and Roath to newer developments across the city, our team understands the pipework typically found in different property types and tailors our approach accordingly. If you’re unsure whether your area is covered, get in touch, and we’ll let you know.
Business Hours
24 Hours, 7 Days A Week
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We Are Highly Recommended in Cardiff & The Surrounding Areas
Pipework Repairs in Cardiff
From Hidden Leaks To Failed Joints
Pipework problems aren’t always obvious. A pinhole leak in copper can quietly damage a ceiling for weeks before anyone notices. By the time most customers call us, the damage, such as damp patches, low pressure, or a water bill that’s crept up, is already done.
There’s no point in cutting into a wall in the wrong place or treating the symptom instead of the cause. We always diagnose properly before we do anything. Our Cardiff plumbers will find the issue, tell you exactly what’s happened, and carry out the repair right the first time. If water is actively coming in, we stop it before we go any further.
We don’t rip up floors we don’t need to. When the repair is done, we test the pipework under pressure and show you what we did.
Currently dealing with a leak? Contact our team to book a pipework repair.
Pipework Replacement & New Installs
Repipes, Rerouting & New Pipework
Old lead supplies, badly corroded copper, and failed plastic runs in newer properties should always be replaced rather than patched up.
At NJ Harkus, we handle full and partial repipes across Cardiff, from period properties in Pontcanna and Roath still running on lead, to kitchen and bathroom renovations where the pipework needs rerouting to fit the new layout.
The process of repiping is methodical. Pipework is concealed where it should be, supported correctly, insulated where exposed to cold, and pressure tested before we sign anything off. We will always talk you through the options before we start, including where copper, plastic, or push-fit makes more sense, and as always, give you a clear price for the work rather than vague estimates.
If you’ve had repeat leaks, low pressure, or you’re planning work that means the pipework needs moving anyway, get in touch, and we’ll come and have a look.
Frequently Asked Questions
Our Pipework Service FAQs
Is it cheaper to repair or replace pipework?
It depends on the condition of the existing pipework. A single failed joint or a one-off pinhole leak is almost always cheaper to repair. But if you’ve had repeated leaks in the same area, or the pipework is old lead or badly corroded copper, repair is a short-term fix, and replacement usually offers better value over time.
Do you replace lead pipes?
Yes. Lead supply pipes are still found in older Cardiff properties, particularly Victorian and Edwardian terraces, and we replace them as part of upgrade work or where they’re causing pressure or water quality issues. We can also coordinate with Welsh Water, where the section being replaced extends to their responsibility.
What type of pipework do you use?
It depends on the job, but copper still has a place, particularly for visible runs and certain heating circuits. Push-fit and plastic systems are quicker to install and work well for concealed pipework in many properties.
We will always use what’s most appropriate for the application rather than defaulting to one material.
Can you reroute pipework for a kitchen or bathroom renovation?
Yes, rerouting pipework is a routine part of bathroom and kitchen refits, and we regularly work alongside builders, kitchen fitters, and bathroom installers. If you’re planning a project, the best time to talk to us is before any walls or floors come up.
