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Why Professional Hot Water & Cylinder Work Matters
- Correct installation keeps pressurised hot water systems safe
- G3-qualified engineers required by law for unvented cylinder work
- Proper sizing delivers strong showers without wasting energy
- Well-maintained cylinders reduce leaks, faults and emergency callouts
Our Hot Water & Cylinder Process
Get in Touch
Call us or get in touch. Tell us about your hot water problem, Megaflo upgrade or cylinder replacement and we will answer any questions before arranging a visit.
Survey & Assessment
We inspect your existing cylinder, pipework and hot water demand, then explain whether repair, replacement or a vented-to-unvented change is the best option.
Professional Installation or Repair
Cylinder work is completed with regulation-compliant pipework, safety valves, insulation and neat routing — whether vented, unvented, Megaflo or immersion-related.
Testing, Commissioning & Handover
Safety devices are tested, temperatures are set correctly and you receive clear advice on operating and maintaining your hot water system — with G3 documentation on unvented installs.
Hot Water & Cylinder Services
Unvented cylinder installation
G3-compliant unvented cylinder installation for mains-pressure hot water — safety valves, expansion vessels and discharge pipework to current standards.
Megaflo installation & replacement
Megaflo supply, installation and replacement for stronger showers and multi-bathroom homes across Berkshire.
Vented hot water cylinders
Traditional vented cylinders and header tanks — replacement, relocation and pipework upgrades for dependable gravity-fed hot water.
Immersion heaters & dual-coil setups
Immersion heater replacement, thermostat upgrades and dual-coil or dual-element configurations for electric backup and boiler-fed cylinders.
Hot water cylinder installation & replacement
New cylinder installations and like-for-like replacements — sized for your property, integrated with your boiler or heat pump where required.
Hot water cylinder repairs & faults
No hot water, leaks, pressure faults, immersion failures and tundish issues diagnosed and resolved professionally.
Annual G3 cylinder servicing
G3 safety checks, valve testing and compliance servicing for unvented and Megaflo systems.
Don't see what you're looking for?
Looking for something else? APS provides a full range of plumbing services across Berkshire.
Call us on 01635 269888 or get in touch and we'll be happy to help.
Common Hot Water Problems
Hot water faults are frustrating and often worsen if left. APS diagnoses cylinder, Megaflo and immersion problems promptly across Berkshire — with repair or replacement advice you can trust.
- No hot water
- Cylinder leaks
- Poor shower pressure
- Faulty immersion heaters
- Lukewarm or intermittent hot water
- Unvented cylinder pressure faults
- Megaflo tundish dripping
- Expansion vessel or valve problems
- Noisy hot water systems
For major leaks or complete loss of hot water in winter, our emergency plumbing team is available 24/7 across Berkshire to make your property safe and restore supply where possible.
Replacing Your Cylinder? Upgrade Your Heating Controls Too
Replacing or upgrading a hot water cylinder is a practical time to modernise your heating controls. Smart thermostats and TRVs improve comfort and give you room-by-room control.
- Room-by-room control
- Control from your phone
Hot water cylinder & G3 unvented specialists
No hot water is often the cylinder, immersion or a safety valve — not the boiler. APS G3-qualified engineers install and repair vented and unvented cylinders, including Megaflo, across Newbury and Berkshire, with tundish faults diagnosed properly and the paperwork left behind.
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Related Plumbing & Heating Services
Hot Water Cylinders in Newbury & Berkshire — FAQs
Do you install both vented and unvented hot water cylinders?
Yes. APS installs and replaces vented cylinders with header tanks and mains-pressure unvented cylinders such as Megaflo — with clear advice on which system suits your property and hot water demand. Unvented cylinders run at mains pressure without a loft tank, giving stronger showers, and require G3-qualified installation plus annual safety checks.
Are your engineers qualified for unvented cylinder and Megaflo work?
Yes. Unvented hot water cylinder installation and servicing requires G3-qualified engineers. APS completes Megaflo and other unvented work to current safety standards with full testing on commissioning.
Can you replace a Megaflo cylinder in Berkshire?
Yes. We supply and install Megaflo and other unvented cylinders, including expansion vessel and safety valve testing on commissioning — covering Megaflo installation and Megaflo replacement across Newbury, Thatcham and Berkshire.
Can you replace immersion heaters?
Yes. We replace faulty immersion heaters, thermostats and elements on vented and unvented cylinders — restoring reliable electric hot water backup where required.