Toilet Repair & Installation Cardiff
New Toilets Fitted & Existing Ones Repaired
We install and repair toilets of every type, from standard close-coupled units to wall-hung toilets with concealed cisterns.
Book an Engineer →Your Local Plumber in Cardiff
We’re local plumbers handling toilet installations, replacements and repairs across every type of toilet and bathroom setup.
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 toilet work across Cardiff, from single replacements to full bathroom refits and faulty cistern repairs.
Complete Toilet Services Across Cardiff
Installation, Replacement & Repair
We install and repair toilets in every room of the house, whether it’s a single-cistern toilet that’s stopped working or a brand-new wall-hung toilet fitted as part of a bathroom refit. Our Cardiff plumbers handle everything, from standard close-coupled units to modern concealed cistern systems from Geberit and other top brands.
Our toilet services include:
- New toilet installation and replacement
- Close-coupled, back-to-wall and wall-hung toilet fitting
- Concealed cistern installation and repair (Geberit and similar)
- Cistern repairs, including running and slow-filling toilets
- Inlet valve and flush valve replacement
- Repairs to leaks at the base, behind the cistern, or from the inlet pipe
- Soft-close toilet seat replacement
- Dual-flush mechanism repair and replacement
- Cracked toilet pan or cistern replacement
Need A Toilet Fitted or A Faulty One Sorted?
Toilet Installation & Repair Across Cardiff & Nearby
We install and repair toilets across Cardiff and the surrounding areas, including Penarth, Sully, Barry, Cowbridge, Pontyclun, Llantrisant, and Dinas Powys. From cloakroom toilets in city-centre flats to full bathroom installations in larger Vale properties, our team handles the work properly, whatever the property.
Business Hours
24 Hours, 7 Days A Week
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We Are Highly Recommended in Cardiff & The Surrounding Areas
New Toilet Installation
From Standard Suites To Wall-Hung Concealed Cisterns
A new toilet is rarely just bolting it down and connecting the water. The waste seal at the floor has to be perfect, the cistern needs the right inlet and flush valves, and the unit has to sit square without rocking. Get any of those wrong, and you’ll have leaks, smells, or a loose toilet within months.
We install toilets across every type of bathroom setup, including close-coupled suites in family bathrooms, back-to-wall units in modern fitouts, wall-hung toilets on concealed cisterns, and cloakroom units in the smallest of downstairs WCs. Whether you’ve already chosen the toilet or you’d like advice on what’ll work with your existing plumbing, we’ll handle the installation properly from start to finish.
Planning a new toilet? Get in touch, and we’ll come and have a look.
Toilet Repairs Cardiff
Faulty Cisterns & Leaks Put Right
Most toilet problems are simpler than they look. Constantly running toilets usually indicate a worn valve in the cistern, and slow-filling toilets usually indicate a blockage or a worn fill mechanism. Either way, the parts are cheap, and the repair is straightforward.
We repair leaks at the base of the toilet, leaks from the cistern, faulty flush mechanisms, dual-flush button issues, and wobbly fittings that worsen the longer they’re left. Where the toilet itself is cracked or beyond economical repair, we’ll let you know honestly and recommend a like-for-like replacement.
Got a toilet that needs fixing? Get in touch, and we’ll come and put it right.
Frequently Asked Questions
Our Toilet Service FAQs
My toilet won't stop running. Can it be fixed?
Almost always, yes. A constantly running toilet is usually a failed inlet valve or a worn flush valve seal. Both are inexpensive parts, and the repair is usually done within an hour. We’ll diagnose the cause before recommending any replacement.
Do you fit wall-hung toilets with concealed cisterns?
Yes. Wall-hung toilets with concealed cisterns, such as Geberit, are more complex to install than standard toilets because the cistern is built into a frame inside the wall. We handle the full job, including the frame, plumbing connections, and final fitting.
Can you fix a leaking cistern?
Yes. Leaks from a cistern usually come from the inlet valve, the flush valve, or the seal between the cistern and the pan. All are repairable in most cases, and we’ll let you know if any parts need to be replaced before the work starts.
Can you replace a toilet as part of a bathroom renovation?
Yes. A lot of our toilet installations happen during wider bathroom refurbishments, where we coordinate with the bathroom fitter or kitchen installer doing the broader work. The best time to bring us in is at the planning stage.
