Boiler Losing Pressure
Boiler Losing Pressure
Boiler losing pressure in Barnet? Constant topping up means something is leaking or the expansion vessel has failed — we find which, and fix it.
Boiler Losing Pressure in North London, done properly the first time
A sealed heating system should hold its pressure for months. If you are re-pressurising every week, water is leaving the system or the expansion vessel is no longer absorbing expansion.
The common causes are a weeping radiator valve or towel rail, a pinhole in buried pipework, a leaking auto air vent, a failed pressure relief valve discharging outside, or a flat expansion vessel with a perished diaphragm.
We pressure-test, check the PRV discharge outside, recharge or replace the vessel and trace hidden leaks without pulling up floors unnecessarily.
Why choose Norvex for boiler losing pressure
Premium workmanship, fixed pricing and a service experience built around you.
Leak tracing without unnecessary damage
Expansion vessel recharge or replacement
Pressure relief valve testing and renewal
Radiator valve and towel rail leaks fixed
Fixed price agreed up front
12-month workmanship guarantee
A calm, four-step process
From the first call to a tidy handover — no surprises, no jargon, no mess.
Get in touch
Call us or send a quick enquiry — we'll respond within an hour during working hours.
Free survey & quote
An engineer assesses the work and gives you a clear, written, fixed-price quote.
Book a date that suits you
Choose a slot that fits around your schedule — we work evenings and weekends.
Work completed cleanly
Uniformed engineers carry out the work, tidy up fully and walk you through everything before leaving.
Get a fast quote for boiler losing pressure
Free, no-obligation quotes. Most calls answered within 30 seconds.
Why choose Norvex
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited
Worcester, Vaillant, Ideal & more
Same-week Appointments
Most jobs booked within 48 hours
5★ Reviewed
Hundreds of verified reviews
Your questions, answered
What pressure should my boiler be at?
Most domestic systems sit around 1 to 1.5 bar cold, rising when hot. Check the manufacturer figure on your appliance — some differ.
Is it safe to keep topping up?
Short term yes, but repeatedly adding fresh water introduces oxygen and accelerates internal corrosion and sludge. It is worth fixing the cause.
How do you find a hidden leak?
Pressure testing, thermal imaging and acoustic tracing where needed, so we open up one small area rather than a whole floor.
Could it be the expansion vessel?
Very often, especially if the pressure swings widely between cold and hot. We test the charge and recharge or replace it.
Which areas of North London do you cover for boiler losing pressure?
We provide boiler losing pressure across the whole of North London, including Barnet, Finchley, Muswell Hill, Hampstead, Highgate, Enfield and the surrounding N, NW and EN postcodes. Local engineers means short call-out times wherever you are.
What our customers say
"Quoted, fitted and gone in a day. New boiler, no fuss, new smart thermostat thrown in. Best tradespeople we've had in years."
Sarah, Barnet
"Emergency call at 9pm — engineer on site by 10:30. Sorted the leak that night. Highly recommend."
Michael, Finchley
"Total bathroom renovation. Beautiful job, on budget, finished early. We'll be using Norvex for the kitchen next."
Priya, Highgate
Ready when you are
Book boiler losing pressure with a Gas Safe engineer — fixed pricing, same-week appointments.
Boiler Losing Pressure near you
Book boiler losing pressure today
Free quotes, fixed pricing and Gas Safe engineers across Barnet, Finchley, Muswell Hill, Hampstead and the rest of North London.