Megaflo & Unvented Cylinder Servicing in Merton Park
Covering SW19, SW20 and surrounding streets
An unvented hot water cylinder — Megaflo, Santon, Range Tribune, Gledhill Stainless — must be serviced annually by a G3 qualified engineer to stay safe and hold its warranty. Kingston Heating services unvented cylinders across Merton Park (SW19, SW20) with the correct expansion-vessel, T&P valve and tundish checks.
Gas Safe registered · Local engineers in Merton Park · Same-day availability where possible
Every service includes discharge testing on the pressure-relief and temperature-relief valves, expansion-vessel recharge or replacement where charge has dropped, and immersion-heater and thermostat testing. You leave with a Benchmark record for warranty and future property sales.
What our Megaflo and unvented cylinder servicing service covers in Merton Park
- Full G3 annual service on Megaflo, Santon, Gledhill and Range cylinders
- Expansion vessel recharge or replacement
- T&P and PRV discharge test through the tundish
- Immersion element and thermostat testing
- Descaling on hard-water systems
- Benchmark service record for warranty
No heating or hot water? Emergency callouts prioritised across KT & TW postcodes.
Common problems we fix in Merton Park
- Cylinder discharging water through the tundish
- Hot water pressure has dropped or fluctuates
- Cylinder overheating or making banging noises
- Cylinder never had a G3 service since installation
- Warranty at risk without an annual service record
When to call an engineer
- It's been 12 months since your last unvented service
- You've bought a property with no cylinder service history
- You can hear water dripping down the tundish or through the wall
- Hot water pressure has dropped or flow has slowed
Local knowledge in Merton Park
Our engineers regularly work across Kingston Road, Morden Road and surrounding streets in SW19, SW20. We know the housing stock — from period properties needing careful pipework routing to modern flats with combi boilers — and price every job clearly upfront.
Pricing
Fixed-price unvented cylinder service. Expansion vessel replacement, PRV replacement and immersion swaps are quoted separately if required.
Why choose Kingston Heating?
Gas Safe Registered
Qualified & certified engineers
Highly Rated Locally
Reviews from KT & TW customers
Genuinely Local
Engineers based in the area
Same-Day Availability
Where possible, for urgent jobs
What customers say
"Boiler died on a Friday evening — engineer arrived Saturday morning and had it running within the hour. Clear pricing, no fuss. Exactly what you want."
"Used Kingston Heating for our annual service and landlord certificates across three flats. They dealt with the tenants directly and emailed everything over the same day."
Megaflo & Unvented Cylinder Servicing in Merton Park — FAQs
How often should a Megaflo be serviced in Merton Park?
Every 12 months. Annual G3 servicing is a warranty condition on Megaflo, Santon, Range and Gledhill unvented cylinders in Merton Park (SW19, SW20) and across the UK.
Why is my Megaflo dripping through the tundish?
The most common cause is a discharged expansion vessel — as hot water expands it has nowhere to go, so pressure lifts the expansion-relief valve. We recharge the vessel or replace it and check the PRV to confirm the cylinder is safe.
Are you G3 qualified?
Yes — G3 is a legal requirement for unvented cylinder work under Building Regulations Part G3, and every unvented job is carried out by a G3 qualified engineer.
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Book Megaflo and unvented cylinder servicing in Merton Park
Local Gas Safe engineers covering SW19, SW20. Same-day availability where possible.