Boiler Losing Pressure
Boiler Losing Pressure
Boiler losing pressure in Kingston upon Thames? Constant topping up means something is leaking or the expansion vessel has failed — we find which, and fix it.
About this service
Boiler Losing Pressure in South West 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 Maxfix
Why choose Maxfix 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
How it works
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.
Trusted experts
Why choose Maxfix
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited [to be confirmed]
[accreditations to be confirmed]
Open 24 Hours, Every Day
Call any time — including nights and weekends
Fixed Price, Always
Agreed before we start — no hourly creep
Frequently asked
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 South West London do you cover for boiler losing pressure?
We provide boiler losing pressure across the whole of South West London, including Kingston upon Thames, Richmond, Wimbledon, Twickenham, Surbiton, Fulham, Putney, Teddington, New Malden, Molesey, Hounslow, Brentford, Isleworth, Long Ditton, Worcester Park, Roehampton, Raynes Park, Morden, Petersham, Motspur Park and the surrounding KT, TW and SW postcodes. Local engineers means short call-out times wherever you are.
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Boiler Losing Pressure near you
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Free quotes, fixed pricing and Gas Safe engineers across Kingston upon Thames, Richmond, Wimbledon, Twickenham and the rest of South West London.