Leak Detection & Plumbing · Northwood
Plumber and Leak Detection in NorthwoodFound Fast, Fixed Properly
Hidden leak, boiler fault or new bathroom in Northwood? Specialist leak detection and 24-hour plumbing from nearby Pinner, no call-out charge.
★ 4.8 from 94 Google reviews · Open 24 hours · No call-out charge
Local to Northwood
Your local plumber in Northwood
Northwood is next door to our Pinner base, and we cover Northwood, Northwood Hills and Moor Park regularly. For emergencies in Northwood we aim to reach you within 3 hours, 24 hours a day.
Response times to Northwood
We're open 24 hours, every day of the year. For emergency jobs in Northwood, burst pipes, water coming through ceilings, no heating, blocked toilets or suspected gas leaks, we aim to be with you within 3 hours. For planned work such as boiler servicing, installations and bathrooms, we'll arrange a time that suits you and turn up when we say we will.
Homes in Northwood
Northwood has many large detached and semi-detached homes, often from the early 20th century and inter-war years, along with Northwood Hills' Metroland semis and modern apartment developments near the station.
What Northwood customers call us for
In Northwood we're often asked for specialist leak detection, boiler installations and servicing, bathroom installations, hot water cylinder work and power flushing.
Services in Northwood
Everything plumbing and heating in Northwood

Emergency Plumber in Northwood
24-hour call-outs. We aim to be with you within 3 hours, with no call-out charge.
Free quote →
Leak Detection in Northwood
Acoustic, thermal imaging and gas detection to find leaks fast with minimal disruption.
Free quote →
Boiler Installation in Northwood
Approved installer for Vaillant, Worcester Bosch, Navien, Ideal and Main. Warranties up to 10 years.
Free quote →
Boiler Repair in Northwood
No heating or hot water? Honest diagnosis and repair, with no call-out charge.
Free quote →
Boiler Servicing in Northwood
Keep your boiler safe, efficient and within warranty.
from £100 →
Central Heating & Power Flushing in Northwood
Central heating installs, radiators and power flushing for cold spots and sludge.
Free quote →
Gas Safety Certificates (CP12) in Northwood
Gas safety and landlord CP12 certificates, plus gas leak detection.
from £80 →
Drainage & Drain Jetting in Northwood
Blocked drains cleared with high-pressure jetting, plus drain surveys.
Free quote →
Bathroom Installation in Northwood
Bathroom suites fitted, plus soil stack and waste pipe replacement.
Free quote →
Toilet Repairs & Unblocking in Northwood
Blocked, leaking or running toilets fixed quickly.
Free quote →
Taps, Showers & Kitchen Plumbing in Northwood
Taps, showers and water filters supplied and fitted, plus general plumbing repairs.
Free quote →
Hot Water Cylinders in Northwood
Hot water cylinder repairs and replacements.
Free quote →Why choose J&L
Why Northwood homeowners choose us
J&L is owner-run and based in Pinner, led by Jack Webster, who has 24 years of experience in the plumbing trade. That experience covers the kinds of homes you find in Northwood, from older properties with pipework added over many decades to modern flats with compact systems.
There's no call-out charge anywhere in Northwood, and every job is quoted free on site, so you decide with the price in front of you. We aim to reach emergencies within 3 hours, we're fully insured with public liability cover, and we accept card, cash and bank transfer.
We hold a 4.8★ rating from 94 Google reviews. The same things come up again and again: fast response, honest advice, fair pricing, punctuality and leaving homes clean and tidy. Many customers use us repeatedly, one for over seven years.
Local issues
Common plumbing and heating problems in Northwood
Hidden leaks in large homes
Big houses have long pipe runs under floors and behind walls. Acoustic and thermal imaging detection pinpoints leaks without lifting whole rooms.
Heating balance
Extended homes often have radiators that never quite get hot. Power flushing and rebalancing restores even heat.
Hot water demand
Several bathrooms need a system boiler and properly sized cylinder. We'll advise honestly on the best setup.
Ageing boilers
Many boilers in Northwood are due for replacement. We fit Vaillant, Worcester Bosch, Navien, Ideal and Main, mostly with warranties of up to 10 years.
Winters around Northwood and the wider London Borough of Hillingdon area bring regular cold snaps, when boiler condensate pipes freeze and exposed pipework in lofts and outbuildings can split. If your boiler stops on a frosty morning, it's often a frozen condensate pipe, something we can thaw and protect so it doesn't happen again.
Our process
How it works in Northwood
- 1
Call or request a quote
Tell us what's wrong. For emergencies we'll talk you through making things safe.
- 2
We come to you
Emergency jobs: we aim to be with you within 3 hours. No call-out charge.
- 3
Diagnose and quote
We find the real cause and give you a free quote on site.
- 4
Do the work
Repaired or installed properly, with the area protected.
- 5
Test and tidy
Everything tested, area left clean. Pay by card, cash or transfer.
Looking after your plumbing and heating in Northwood
Most emergencies we attend in Northwood start as small problems: a dripping joint, a boiler that keeps losing pressure, a radiator that is cold at the bottom, or a drain that empties slowly. Dealing with these early is almost always cheaper and less disruptive than waiting for a breakdown. If you notice a damp patch, a rising water bill, a hissing sound when taps are off or a boiler showing a fault code, it's worth a call.
An annual boiler service, from £100, is the simplest way to keep your heating reliable through winter. It checks the boiler is burning safely, cleans key parts and keeps most manufacturer warranties valid. For landlords in Northwood, an annual gas safety certificate, from £80, is a legal requirement, and it makes sense to book both at the same visit.
If your boiler is getting older, parts are hard to find or it keeps breaking down, a replacement may cost less over time than repeated repairs. We'll give you an honest view on site. As an approved installer for Vaillant, Worcester Bosch, Navien, Ideal and Main, we can fit a boiler matched to your home and hot water needs, with warranties of up to 10 years on most models.
In a plumbing emergency, turn off the water at the stopcock (often under the kitchen sink), switch off the electrics if water is near sockets or lights, and call us on 07845 967854. If you smell gas, turn off the supply at the meter, open windows, don't use switches, leave the property and call the National Gas Emergency line on 0800 111 999.
Whether you're in Northwood itself or one of the neighbouring areas, you'll deal directly with Jack Webster, get a clear price before any work begins, and have your home left clean and tidy afterwards.
Yes. We're based in nearby Pinner and cover all of Northwood for plumbing, heating, boilers, gas and drainage.
For emergency jobs in Northwood, we aim to be with you within 3 hours, 24 hours a day.
There's no call-out charge in Northwood. We quote every job free on site. Boiler servicing starts from £100 and gas safety certificates from £80.
Yes. We're open 24 hours, every day, including nights, weekends and bank holidays.
Yes. We use acoustic, thermal imaging and gas detection equipment to find leaks with minimal disruption.
Yes, along with Northwood and Moor Park.
We're an approved installer for Vaillant, Worcester Bosch, Navien, Ideal and Main. Most new boilers come with warranties of up to 10 years.
Card, cash or bank transfer.
Nearby areas we cover
As well as Northwood, we cover the neighbouring areas below and the wider North West London and South West Hertfordshire region from our Pinner base.
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Need a plumber in Northwood today?
Open 24 hours. No call-out charge. Free quote on site. Rated 4.8★ on Google.
