Plumbing and heating work in Edgware's suburban houses tends to revolve around three things: replacing narrow ageing pipework, upgrading central heating systems installed decades ago, and plumbing new bathrooms into loft conversions. The local housing stock — much of it built between the wars and just after — shapes what each job involves, so it helps to understand the buildings before considering the work.
The houses you'll find around Edgware
Much of Edgware grew along the Watling Street corridor in the 1920s and 1930s, when the Northern line extension opened up the area for housing. The result is street after street of three-bedroom semi-detached homes, typically with a bay window at the front and a kitchen extension at the rear.
Closer to the post-war estates, you find slightly later housing with similar layouts but different construction details. Both types share common plumbing traits: a single family bathroom upstairs, an airing cupboard housing a hot water cylinder, and original pipe runs that were never designed for modern demand.
Because the layouts repeat so closely from house to house, plumbers working locally tend to recognise the same quirks — the boxed-in pipework over a stairwell, the cylinder squeezed into the back bedroom cupboard, the boiler tucked into a kitchen corner.
Microbore and older pipework in interwar homes
The local housing stock — much of it built between the wars and just after — shapes what each job involves, so it helps to understand the buildings before considering the work.
A frequent issue in these houses is microbore pipework. Microbore means narrow-gauge copper pipe, usually 8mm or 10mm, often laid when central heating was retrofitted from the 1970s onwards. It was cheaper and quicker to install, but the small bore restricts flow and is prone to blockages from sludge over time.
Sludge is a build-up of corrosion and debris inside the system. In microbore it can choke a radiator entirely, leaving cold patches or rooms that never quite warm up. A power flush — forcing cleaning fluid and water through the system at pressure — can clear some of this, but heavily furred microbore sometimes needs replacing outright.
When a homeowner upgrades a central heating system, the decision often comes down to whether the existing microbore can be kept. Points commonly raised when assessing this include:
- whether radiators heat evenly or show persistent cold spots
- the age and condition of the boiler relative to a new install
- access under floors and the practicality of running larger 15mm or 22mm pipe
- whether a combi boiler, which heats water on demand, suits the household's hot water use
Swapping a conventional system with a cylinder for a combi removes the need for tanks in the loft, which can be useful if that space is being converted. It does, however, change how the pipework is configured throughout the house.
Plumbing a bathroom or en-suite into a loft conversion
Loft conversions are common in Edgware semis, often turning the roof space into a master bedroom with its own en-suite. Adding a bathroom that high in the house raises questions of water pressure and waste routing that don't apply to a ground-floor or first-floor installation.
Getting hot water to the top of the house at usable pressure can be the deciding factor. A gravity-fed system with a tank may struggle, which is one reason loft bathrooms often prompt a move to a pressurised or combi-based setup. A pump is sometimes fitted to a shower instead.
Waste pipes also need a route down to the existing soil stack — the main vertical drainage pipe — without long horizontal runs that drain poorly. Where gravity won't carry waste, a small pump for the toilet and basin may be specified. Building Regulations apply to both the structural conversion and the new drainage, so these elements are usually planned together rather than added as an afterthought.