Hot water cylinders, vented & unvented

Cylinder installation and replacement, servicing and repair, immersion heaters and controls. Sized around how much hot water the house needs at once.

Covering North & Northwest London and the Hertfordshire borders, from our base in Colindale.

A scaled immersion heater lifted from a hot water cylinder

When people call us about this

  • Hot water runs out faster than it used to
  • Water is lukewarm however long you wait
  • The cylinder is leaking or the immersion has failed
  • The pressure relief valve keeps discharging
  • You're adding a bathroom and want to know if the system will cope

How the job runs

  1. 01

    Size it around the house

    How many bathrooms, how many people, how often at the same time. A cylinder sized on the actual demand is the difference between enough hot water and a bigger bill for the same problem.

  2. 02

    Install or repair

    Vented and unvented, installation through to servicing and repair, including immersion heaters and controls.

  3. 03

    Service annually

    Unvented cylinders are pressurised and need an annual check by someone qualified to work on them. It isn't optional maintenance.

From real jobs

“No job is too small”

Over the years he has done boiler servicing, power flushing, toilet repair and refurbishing, even a single tap fitting — no job is too small. Most recently he installed a new boiler and water softener for us. He is prompt, courteous, meticulous and his work is of the highest quality.
Jim Wharmby · Google

Questions we get asked

What's the difference between vented and unvented?
A vented cylinder is fed from a tank in the loft and relies on gravity for pressure. An unvented one is fed straight from the mains, so it delivers mains pressure to every outlet, but it's a pressurised vessel and needs annual servicing.
Why does my hot water run out so quickly now?
Usually limescale. North London is a hard water area, and scale builds on the coil inside the cylinder until it can't transfer heat properly. It's gradual, so most people don't notice until it's bad.
Can anyone service an unvented cylinder?
No. It requires a specific qualification on top of Gas Safe registration, because an unvented cylinder is a pressurised system.

Areas we cover

We cover 17 areas in total. See every area we cover.

Other things we do

24/7 emergency callout

Hot water cylinders, priced before we start.

Gas Safe registered, 12 years in, and rated 4.8–5 stars on Google and Checkatrade.

07525 379063Request a callback