Business Details
Emergency
services
Expert Plumbing and Heating Services in Cardiff
Established over 15 years ago, NJ Harkus Plumbing and Heating has built a reputation as one of Cardiff's most trusted plumbing and heating specialists. Our Gas Safe registered engineers deliver 24/7 emergency services alongside comprehensive boiler installations, repairs, and maintenance. With City and Guilds qualified professionals and a fleet of fully equipped vehicles, we handle everything from minor leaks to complete system overhauls. Our commitment to quality is evidenced by our extensive Google Reviews and partnerships with leading boiler brands.We prioritise customer satisfaction through transparent communication, competitive pricing, and guaranteed workmanship. Our team's technical expertise extends to unvented hot water systems, LPG installations, and legionella risk assessments. As a family-run business, we combine local knowledge with industry-leading standards to serve residential and commercial clients across South Wales.
Services
Boiler Installation
Emergency Plumbing
Central Heating
Landlord Certificates
LPG Systems
Unvented Cylinders
Legionella Testing
Bathroom Fitting
Highlights and features
- We have over 15 years of local plumbing experience in Cardiff
- Our engineers are Gas Safe registered (518700) and City & Guilds qualified
- We provide guaranteed 1-hour response times for emergencies
- We offer free boiler installation quotations with no obligation
- We maintain 100% transparency with no hidden fees
Associations and certifications
- Gas Safe Registered
- City and Guilds Qualifications
What people say
Professional, efficient team
Highly recommend
Completed job quickly
Excellent communication
Thorough workmanship
Services
Boiler Installation
Professional boiler installations for combi, system, and regular boilers. We work with leading brands including Vaillant, Worcester, and Baxi. Our engineers ensure efficient operation and full compliance with building regulations. All installations include warranty registration and commissioning on the same day.
Emergency Repairs
24/7 emergency plumbing and heating repairs. Specialising in boiler breakdowns, gas leaks, and water leaks. Our rapid response team arrives within an hour with fully equipped vehicles. We prioritise safety and provide temporary solutions when permanent repairs require additional parts.
Landlord Certificates
Gas Safe registered safety assessments for landlords. Includes comprehensive boiler and gas appliance inspections. We provide official Landlord Gas Safety Records valid for 12 months. Our engineers ensure compliance with current safety regulations and documentation requirements.
Central Heating
Complete central heating system services including installations, repairs, and powerflushing. We install radiators, thermostatic valves, and smart controls. Our team optimises system efficiency and provides annual servicing to maintain performance and warranty validity.
LPG Systems
Specialist LPG boiler installations and maintenance for rural properties. We service tanks, regulators, and gas appliances. Our engineers handle conversions from mains gas to LPG systems. We ensure compliance with safety standards for off-grid gas installations.
Questions
Do you offer 24/7 emergency plumbing services?
Yes, we provide 24/7 emergency plumbing and heating services across Cardiff with a guaranteed 1-hour response time.
Are your engineers Gas Safe registered?
All our gas engineers hold current Gas Safe registration (518700) and City & Guilds qualifications.
What payment methods do you accept?
We accept all major credit cards alongside cash and bank transfers for completed plumbing and heating work.
Do you provide free boiler quotations?
Yes, we offer free, no-obligation boiler installation quotations with site visits available for accurate assessments.
What areas do you cover?
We serve Cardiff and surrounding areas including Penarth, Sully, Llantrisant, and Caerphilly.
Can you service LPG boiler systems?
Our engineers specialise in LPG boiler installations, repairs, and maintenance for rural properties without mains gas access.
