Cylinder Installation
London Specialists
Unvented and vented hot water cylinder installations across London. Megaflo specialists — our work was recognised by Megaflo's own installer campaign.
Unvented cylinder specialists
Recognised by Megaflo
themselves
Featured in the Megaflo Installer Campaign
Megaflo is the UK's leading unvented cylinder brand — part of the Baxi group. DGN GAS was selected to feature in their own installer campaign. This reflects the standard of our cylinder installation work across London.
Hot water that never
runs out
A modern unvented hot water cylinder transforms the hot water experience in your home. Unlike a combi boiler, a cylinder stores a large volume of hot water — delivering powerful mains-pressure hot water to every tap and shower simultaneously.
It's the preferred choice for larger homes, homes with multiple bathrooms, or any household where hot water demand is high.
Which cylinder is
right for you?
Unvented Cylinder
Connected directly to the mains. Delivers hot water at mains pressure — powerful showers, fast-filling baths, multiple outlets simultaneously. No loft tank needed. Megaflo is the market leader.
Vented Cylinder
Works with a cold water storage tank in the loft. Reliable and cost-effective — often the right choice for older properties with gravity-fed systems.
Heat Pump Cylinder
Designed to work with air source heat pumps. If you're moving away from gas, a heat pump cylinder is an essential part of the system.
Not Sure?
Call us to discuss your options — we'll advise based on your property, existing setup and hot water needs.
What to expect from
your installation
Assessment & Recommendation
We assess your property, existing system and hot water requirements and recommend the right cylinder type and size.
Quote & Scheduling
A clear, itemised quote with no hidden costs. Scheduled at a time convenient for you.
Installation
Engineers install the cylinder and make all necessary connections to your heating system, cold mains and hot water outlets.
Testing & Safety Checks
Full test of all safety devices, pressure settings and thermostatic controls before sign-off.
Building Regulations & Documentation
All unvented cylinder installations require a Building Regulations notification. We handle this and provide all documentation.
Get in Touch
Free, no-obligation quote
Common questions about
Megaflo & cylinders
What is a Megaflo / unvented cylinder, and do I need one?
Will an unvented cylinder improve my water pressure?
How much does a Megaflo installation cost?
What size cylinder do I need?
Do unvented cylinders need servicing?
Can you install a cylinder in a large home with several bathrooms?
"The guys from DGN Gas were great. We needed them to replace a Megaflo. They were very courteous and respectful as well as being clean and tidy. They completed the job as requested and made sure everything was working well afterwards. Highly recommend."
"I have had a heating system including a Vaillant boiler, Megaflo and underfloor heating installed by DGN GAS. A very professional service and am extremely happy. I especially like the after sales care. Would highly recommend."
Interested in a cylinder installation?
Call us for honest advice and a no-obligation quote. London-wide coverage for all installation work.
Get a Quote 07813 474638