MegaFlo Repairs London

A White Glove Service For Your Home

Megaflow is an Unvented Cylinder. As part of your home's central heating system, Megaflow stores hot water and supplies hot water, whenever you need it.
MegaFlo Repairs London
Their exceptional quality and reliability has made MegaFlows a popular choice.

MegaFlo  Repairs in London

Megaflo is a well-known and respected brand in the heating and plumbing industry. It is important to know what to expect if you require repairs or services. In this blog post, we will provide you with information about Megaflo repairs and services. We will discuss the different types of repairs and services available and the benefits of choosing Megaflo.

What Is Megaflo?

Megaflo is a brand of heating and plumbing products, including boilers, radiators, and water heaters. It has been in business for over 50 years and has a solid reputation in the industry.

Megaflo is an unvented hot water cylinder used in an unvented hot water system. Because the boiler is fed directly from the mains, there is no need for a cold water storage tank. Megaflo cylinders are available in a variety of sizes.

You've probably got one if your cylinder is labelled on the front with a Megaflo. Although there are minor variations between models, our heating professionals are well-versed in reading the manufacturer's instructions for each model to ensure that they do not overlook any crucial distinctions. To receive the services of an expert, you don't need to know what kind of system you have. 

What Are the Advantages of Megaflo?

The major benefit of this boiler type is that it generates excellent hot water pressure; there should be little variation in the hot and cold lines in this respect. Another advantage of Megaflo units compared to other unvented cylinders is that they all need to include space for the water to expand after heating. Even so, Megaflo employs an internal expansion vessel which takes up less space than a separate, external expansion tank. 

This also has the advantage of being able to be sited away from the boiler so that you can place it in a more convenient location. Megaflo cylinders come with a ten-year warranty as standard.

What Are the Disadvantages of Megaflo?

Even though Megaflo is a well-respected and reliable brand, there are some disadvantages to using this boiler. Here are some of the common faults that can occur:

  • Leaking from the expansion vessel. This can cause water to drip from the bottom of the cylinder and over-pressurise the system, leading to a dangerous situation.
  • Faulty immersion heater. This can cause the cylinder to overheat and potentially explode.
  • Leaking from the temperature and pressure relief valve. This can cause water to drip from the top of the cylinder.
  • Leaking from the drain tap. This can cause water to drip from the side of the cylinder.
  • A clogged line strainer/filter. It slows down or interrupts the water flow.
  • The water pressure has dropped below the required level, forcing the pressure-reducing valve to open and release the trapped air.

If you notice any of these faults, it is important to call a qualified heating engineer to repair your boiler as soon as possible.

Megaflo Repairs and Services

To ensure that your Megaflo boiler runs efficiently and safely, it is important to have it serviced regularly. Megaflo recommends that you have your boiler serviced every 12 months by a qualified heating engineer. During a service, the engineer will check for any potential problems and carry out any necessary repairs.

The annual service usually includes:

  • Check and reset the cylinder thermostat.
  • Cleaning the mains water line strainer/filter
  • Check the function of the pressure/temperature relief valve.
  • Re-pressurise the expansion vessel or replace it if needed.
  • Check to see whether the pressure-reducing valve is working.
  • Take the temperature of the water at each outlet and calculate its hot water flow rate.
  • To preserve a warranty, you must certify your service history.

The technician will inspect the condition of all system components, such as the tubing, electrical housing, thermostat, and safety valves. During this operation, they'll also re-pressurise the unit's air to stabilise the expansion chamber. They may do various checks while they're doing this work.

Techs may also inquire about strange occurrences with your Megaflo or hot water systems. The things you tell them will allow them to determine if any issues require their attention. Your technician will take the time to inform you of anything they discovered during the service process, what repairs are needed and how much those repairs will cost.

Who Can Service My Megaflo?

You must use a qualified technician to service your Megaflo. Only someone with the proper credentials and training can carry out this work correctly. The best way to find a qualified technician is to ask friends or family for recommendations.

What Happened If I Ignore the Service?

Your Megaflo boiler must have an annual service to maintain the warranty. If you ignore the service, you void the warranty. You may face any of the following hot water issues if you don't keep up with your maintenance responsibilities:

  • When you need hot water, it isn't easy to access it.
  • When the hot water is used, there isn't enough pressure to fill your sink.
  • Don't let the water run out of your hot tub when you first turn it on.
  • Sounds emanating from your pipes or heating system are unusual.

In some cases, you may also be putting your family at risk. A faulty boiler can lead to carbon monoxide poisoning, fires, and explosions. To avoid these risks, it is best to have your boiler serviced annually.

Megaflo offers a wide range of services. It includes repairs, replacements, and installations. Megaflo also provides maintenance contracts. This allows customers to have their boilers serviced regularly. If you need a Megaflo repair or service, you can contact Megaflo directly or find a qualified heating engineer in your area.

Final Thought

Having your Megaflo boiler serviced regularly is important to ensure it runs efficiently and safely. Megaflo recommends that you have your Unvented cylinder serviced every 12 months by a qualified engineer. During a service, the engineer will check for any potential problems and carry out any necessary repairs. If you have any questions about Megaflo repairs or services, please feel free to comment below. Thanks for reading!


By submitting this form you agree that RARE Plumbing and Heating Services may use your information in accordance with its Privacy Policy

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Schedule a repair service

We are available 24/7 for heating and plumbing repairs.

Schedule a Repair


What's our RARE process?


Call our main phone number on the contact page or get in touch with us via email.


We will offer you advice on the phone and if required arrange for someone to visit your property, typically in the next few hours.


We will visit your home and take every effort to cover furniture and valuables to ensure nothing is damaged.


After agreement of the works we will send you an invoice and arrange for payment only after you are completely happy.


RARE Heating and Plumbing Services is the leading provider of plumbing and heating services in London. We employ a team of talented tradesmen with the skills and experience necessary to tackle heating and plumbing projects of any size.


Monday - Friday

8am - 5pm

5pm - 8am

Saturday - Sunday


Plumbing, Heating




Boiler Service




Gas Safety Certificate




**Fixed Price
Our Rates: We charge a minimum of one hour on all jobs, thereafter work is charged in 15-minute increments (most other companies charge in half hours). Rates exclude materials and are subject to VAT.

* Boiler Service
All Boiler service is subject to parts as some boilers require parts as part of the service this will be charged at a extra cost depending on the boiler.

Download our Free

Download NOW
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
RARE Heating and Plumbing Services brochure - Exclusive Membership Service.

Happy Customers

Have a look at our outstanding reviews to see how we treat our customers and their homes.

We had a problem with our boiler and complex heating system that other plumbers refused to touch. Paresh took it on, and fixed it very quickly. The visit was swift and easy, and he was very sensitive to our shielding requirements.
Michael Quicke
Having previously used Rare to do a full system installation, including new heaters, storage tank, new boiler install, bathroom fit & kitchen appliance install and new piping throughout the home, I called upon them again to service our boiler this winter. Pareshs engineers were punctual, they called 15 mins before arriving and methodically explained the work they work going to carry out, serviced the boiler, drained the radiotors and also treated them. They ensured everything was fine and more importantly assured us the system was in perfect order for the winter and made a few adjustments. More importantly then that the engineers completely cleaned up and washed down the working areas leaving our home spotless. Highly recommend this company for all your plumbing needs.
Amit Halai
Paresh is unusual for a London tradesman -- he comes when he says he will come, he charges what he says he will charge, and the workmanship is always first class. I cannot recommend him highly enough.
James Robertson
Helped me with underfloor heating issue - I am so lucky to have found them! Great customer service, so knowledgeable - can't recommend them highly enough.
Becky B
I called Rare on Christmas Day with an urgent boiler problem. The team was very responsive, professional and polite - the issue was fixed quickly and fortunately they saved us from spending Christmas in a cold home with no warm water! Thanks again!
Yorick Duizendstraal
Paresh of RARE Heating & Plumbing Services leaning on the company van.

A White Glove Service for Your Home.

RARE Heating & Plumbing Services van. Find us at RAREPLUMBING.LONDON on the door.