Leak Detection in Harpenden

Boiler keeps losing pressure, a warm patch on the floor or a damp mark that will not go away? We trace hidden leaks in Harpenden homes and repair them, often in the same visit.

07342 171269 Get a Free Quote

Leak Detection Harpenden

Tracing Leaks in Larger and Extended Homes

Bigger homes have more places for a leak to hide. Many Harpenden houses have long heating runs, several bathrooms, underfloor heating in an extension, and an unvented hot water cylinder. The most common sign we are called about is a sealed heating system that keeps losing pressure, which usually means water is escaping from a radiator valve, a pipe under the floor or a manifold.

We work through the system logically. We check the boiler and cylinder, isolate zones and circuits to see where pressure is lost, and use moisture readings to narrow down the area before lifting a board. On underfloor heating we pressure test each loop separately so we only open the floor where we need to.

Because we are plumbers and heating engineers, we can repair the leak once we find it. If it is on the boiler, see our gas boiler repair page. Our Harpenden plumbing and heating page covers our other work locally.

Leaks We Find in Harpenden Homes

The sources we trace most often in AL5.

Heating Pressure Loss: Leaks on radiator valves, hidden pipework or the boiler itself.
Underfloor Heating Loops: Leaks on a loop or manifold, often in a kitchen or garden room extension.
En-Suite and Loft Bathrooms: Failed shower seals and wastes leaking into rooms below.
Unvented Cylinder Valves: Valves that drip or discharge and connections that weep.
Supply Pipe Leaks: Leaks between the boundary and the house, often found through the water meter.

Signs of a Hidden Leak

Call us if you notice any of these.

Boiler Pressure Keeps Dropping

You need to top the system up every few days or weeks.

Warm or Damp Floor Patches

A warm spot or damp area on a floor with heating pipes underneath.

Stains on Ceilings

Marks below a bathroom or en-suite that keep returning.

A Running Water Meter

The meter keeps turning with everything switched off.

Leak Detection Services in Harpenden

For family homes, extensions and larger properties across Harpenden.

How We Work

Our Leak Detection Process

Assess the System

We check the boiler, cylinder, meter and pressure readings.

Isolate and Locate

We isolate zones and circuits and use moisture readings to find the leak.

Repair and Test

We repair the leak and repressurise and test the system.

Why Harpenden Homeowners Use APH

We understand heating systems as well as plumbing, so we can find and fix pressure loss without guesswork.

Fast response times

Heating and plumbing in one firm.

Qualified professionals

Underfloor heating leaks traced loop by loop.

Transparent Pricing

The price agreed before work starts.

5-Star Customer Reviews

Consistently rated 5 stars by local customers.

07342 171269 Get a Free Quote

What Our Customers Say

Customers often mention how little disruption there was once the leak had been found.

      EXCELLENT  
   Based on 326 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Penny Smith 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really happy with the work carried out by Alban Plumbing and Heating. They fitted several new radiators in my home and the whole process was smooth from start to finish. They arrived on time, were friendly and professional, and took great care while working in the house.
The installation was completed to a high standard, everything was left clean and tidy, and the new radiators look fantastic and heat up perfectly. It's refreshing to find a company that is reliable, communicates well, and clearly takes pride in their work.
I wouldn't hesitate to use Alban Plumbing and Heating again and would happily recommend them to friends and family.
  
 
      Posted on Google  
   
   Inaam Mahmood 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really professional dealings, knows what he talking about does it all, wont leave you hanging like others and gave me good advice that's froom for my house and my pocket. Very hard to find people like this nowadays.
  
 
      Posted on Google  
   
   Thor Conor 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service from Alban Plumbing and Heating Ltd. I contacted them for a plumbing and heating issue at my property in St Albans, and the whole experience was excellent from start to finish.

The engineer arrived on time, quickly identified the problem, and explained everything clearly before carrying out the work. The job was completed to a high standard, and everything was left clean and tidy afterwards.

What stood out most was their professionalism, reliability, and honest approach. Communication was great throughout, and the pricing was fair with no unexpected surprises.

I would highly recommend Alban Plumbing and Heating Ltd to anyone in St Albans and the surrounding areas looking for a trustworthy plumbing and heating company. I will definitely use them again in the future.
  
 
      Posted on Google  
   
   Omar Mohammed 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service from Alban Plumbing & Heating Ltd. Very professional, reliable, and efficient from start to finish. The work was completed to a high standard and everything was left clean and tidy afterwards. Communication was great throughout, and they arrived on time as promised. I would highly recommend them to anyone looking for trustworthy plumbing and heating
  
 
      Posted on Google  
   
   Alban City Dental 
 
 
 
 Trustindex verifies that the original source of the review is Google. Asif has done a great job looking after our plumbing and heating for several years now. He also recently attended in under an hour to fix an emergency leak that he and his son sorted with great efficiency allowing us to get back to work and continue operating with minimal disruption to our business and patients. He’s reasonably priced and friendly and I’m sure we will be using him for many years to come.  His 5 star status is well deserved.
  
 
      Posted on Google  
   
   Mr Afridi 
 
 
 
 Trustindex verifies that the original source of the review is Google. So helpful and has such a good heart. Fixed the stuff with no problem at all at of course the customer service is juts really good . Very friendly very kind I would definitely recommend
  
 
      Posted on Google  
   
   Xell 
 
 
 
 Trustindex verifies that the original source of the review is Google. amazing experience beautiful people
  
 
      Posted on Google  
   
   Parsa Yamin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Fast, cheap and easy fix for my home, 100% recommend for all house problems

Trusted by Leading Brands

Leak Detection in Other Towns

We also find and repair leaks in these areas.

Call Today For Free Quote

Losing Pressure or Water in Harpenden?

07342 171269

Leak Detection Harpenden: Questions Answered

Why does my boiler keep losing pressure?

The most common cause is a leak somewhere on the heating system, such as a radiator valve or a hidden pipe. It can also be the boiler pressure relief valve or an expansion vessel that needs attention.

Can you find a leak in underfloor heating?

Yes. We pressure test each loop separately to find which one is leaking, then narrow down the area before opening the floor.

Will you need to lift floors?

Only where necessary. We use meter checks, zone isolation and moisture readings first so we open up as little as possible.

Do you repair the leak as well?

Yes. We are plumbing and heating engineers, so in most cases we repair the leak in the same visit.

How can I tell if my supply pipe is leaking?

Turn off every tap and appliance and watch the water meter. If it keeps turning, water is being lost, possibly on the supply pipe.

How much does leak detection cost?

It depends on the size of the property and the system. We agree the price before we start.

Which areas of Harpenden do you cover?

All of AL5, including the town centre, Batford, Southdown, West Common and Kinsbourne Green.

Book Leak Detection in Harpenden

If water is coming through a ceiling call 07342 171269 now. For pressure loss or a high water bill, send the form.

Leak Detection in Harpenden

Best Price Guaranteed

Same Day Service

Upfront Pricing

Tracing Leaks in Larger and Extended Homes

Leaks We Find in Harpenden Homes

Signs of a Hidden Leak

Boiler Pressure Keeps Dropping

Warm or Damp Floor Patches

Stains on Ceilings

A Running Water Meter

Leak Detection Services in Harpenden

Heating Leak Detection

Underfloor Heating Leaks

Bathroom Leak Tracing

Cylinder and Valve Leaks

Supply Pipe Testing

Repair Once Found