Unvented Cylinder Servicing (G3)
Unvented Cylinder Servicing (G3)
Annual unvented cylinder servicing (G3) across North London — safety checks, expansion vessel recharge and documentation for your warranty.
Unvented Cylinder Servicing (G3) in North London, done properly the first time
An unvented cylinder is a pressure vessel, and its safety devices need annual attention. We check and recharge the expansion vessel, test the pressure and temperature relief valve, inspect the tundish and discharge route and verify the thermostat and immersion operation.
Skipping the service is the usual reason a warranty claim is refused, and a failed expansion vessel is the usual reason a tundish starts dripping.
Service records are issued in writing — useful for landlords and essential when you come to sell.
Why choose Norvex for unvented cylinder servicing (g3)
Premium workmanship, fixed pricing and a service experience built around you.
G3-qualified engineers
Expansion vessel checked and recharged
Relief valves tested
Tundish and discharge inspected
Written service record issued
Keeps manufacturer warranty valid
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 unvented cylinder servicing (g3)
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
Why is water dripping from my tundish?
Most often a failed expansion vessel charge or a passing relief valve. Both are routine repairs, but should not be ignored.
How often should it be serviced?
Every 12 months, and most manufacturers make it a warranty condition.
Are your unvented cylinder servicing (g3) engineers Gas Safe registered?
Yes — every engineer working on unvented cylinder servicing (g3) in North London is Gas Safe registered, manufacturer-trained and fully insured to £5m public liability. We'll show our ID on arrival.
Do you offer a free quote for unvented cylinder servicing (g3)?
Yes. We provide a free, no-obligation written quote with fixed pricing, so you know exactly what your unvented cylinder servicing (g3) will cost before any work starts.
Which areas of North London do you cover for unvented cylinder servicing (g3)?
We provide unvented cylinder servicing (g3) 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 unvented cylinder servicing (g3) with a Gas Safe engineer — fixed pricing, same-week appointments.
Book unvented cylinder servicing (g3) today
Free quotes, fixed pricing and Gas Safe engineers across Barnet, Finchley, Muswell Hill, Hampstead and the rest of North London.