Is your central heating system dropping pressure? You might have a hidden leak!

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What happens if my boiler pressure is too low?

Boiler pressure too high? Here’s how to fix it

How do I find a water leak under concrete?

Why Choose Us

From the first phone call to the last and throughout the entire visit the level of customer service was excellent. It was a relief to have a technician with so much experience and expertise attend the house to find our mysterious leak. Will definitely call-on again if and when we experience any more problems.

Harry M
Berkshire

Harmuns really led the way on a 10-bedroom property that had bamboozled other firms. Despite the complexity, they clearly and concisely worked out what was wrong and planned out a successful course of action. They are our go to when we need specialist leak detection.

Chris Fraser
Coombe Residential specialises in the luxury residential market across south west London.

We found Harmuns on line and were so glad we did. We had a suspected leak under the tiles in our hallway/kitchen floor. The team were friendly and efficient; the issue was investigated thoroughly, located and repaired promptly. Highly recommend this company.

Rose A
Fulham, London

I was very impressed with the end to end customer service of this job. From the fast and attentive service from David initially to discuss the work and then Pete’s diligent hard work across 1 and a half days to identify and then fix the leak. Pete was respectful of our working from home and facilitated conversations when it was convenient to do so. He explained his findings every step of the way and tidied up well after the work was completed. I hope never to need their services again (!) but I can at least have the confidence that if we get a leak in the future we are in excellent hands.

Adam S
Berkshire

I couldn’t recommend Harmuns more highly. We had damp issue which pointed towards a burst or leaking pipe and we engaged Harmuns to carry out a water leak survey and possible fix. Stephen the engineer who carried out our trace and access investigation could not have been more thorough; he went above and beyond to find the cause of our issue. From start to finish Harmuns team were friendly, professional and extremely knowledgeable. We will be using them for any similar issues going forward.

Sean H.
Brixton, London

Excellent service. The engineer was prompt and thorough and was very reassuring. He located the leak and was able to access and fix it with the very minimum of damage, leaving the house clean and tidy and advising us how to dry the affected area. He checked the heating system was working properly and there were no further leaks before leaving.

Judith H.
Surrey

Contact us for hidden
leak detection!

We fix the leaks
that you can't find

We are not an emergency plumber. If you have a visible leak, please contact your local plumber.

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