JJM The Plumbers offer a professional service to both domestic and commercial customers covering all South Wales areas. A dedicated family run firm of experienced engineers offering a wealth of knowledge in all aspects of plumbing and heating work.

Gas Safe Registered

Being fully qualified and affiliated members on the Gas Safe Register ensures all work undertaken complies with UK industry regulations, for your peace of mind.

Domestic & Commercial

Service & Quality of work is our primary focus in delivering exceptional customer service to both our domestic and commercial customers base.

Our services spanning:
Plumbing | Heating | Gas Work | Bathroom Installations | Breakdowns | Maintenance & Industry Regulated Servicing.

What we do

Having served Cardiff and the South Wales area for over 20 years, we pride ourselves on exceptional customer service levels - from initial consultation through to job completion.


For projects as small as a tap washer, to new boiler installations & breakdown assistance - call us for a free, no obligation quote.


We can help install new systems or maintain traditional existing heating systems covering radiators, valves or boiler repairs. Specialising in under floor heating, JJM also offer a free design and consulation service, that can be tailored to your needs.

Bathroom Installations

We can assist with design and layouts, provide advice and support with choosing a bathroom that’s right for your home and your budget. Our installation service spans the complete project from start to finish, offering the choice of working with our partners across tiling, carpentry, any building works and floor covering finishing touches.

Gas Work

All our engineers are fully qualified and Gas Safe registered to work with both natural gas and LPG. We cover all aspects of gas work including appliance installations, pipe work repairs, gas leaks and Landlord's Safety Inspection certification.


JJM offer a prompt service to assist with breakdown and emergency call out situations. Working closely with local and national letting agents ensures a swift, reliable, efficient service is provided to their staff and client’s tenants, whenever they encounter a problem at their property.


Routine servicing and regular contracts are available, our engineers are qualified to service all domestic boiler makes and models.

Contact us now for a free, no obligation quote

From a tap washer to boiler installation, a gas safety certificate or a maintenance contract, JJM can deliver your plumbing solutions.