Unvented Cylinders

Unvented Cylinders

We can provide you with a qualified unvented cylinder engineer to service your unvented hot water cylinder or Megaflo. Our expert technicians will provide a thorough service to ensure your system is running efficiently at our fixed price.

As a result, the service is both efficient and affordable. We also provide fault diagnosis and repair services for unvented hot water cylinder problems such as hot water pressure drops, lukewarm water, boiler on but no hot water, short-lived hot water, and water escaping through the tundish or when not in use. In addition, our technicians can diagnose and repair problems with the electric heating element. We stand behind our work and guarantee that you will be satisfied with our services.

Our boiler engineers can repair the following unvented hot water cylinder faults:

  • Low hot water pressure
  • Lukewarm water
  • Boiler turned on but no hot water
  • Only a few minutes of hot water
  • Water escaping through tundish
  • Water escaping when not in use
  • Water failing to heat up when the electric element is turned on

Friday’s Plumbing provides a variety of plumbing services to keep your plumbing system in good working order. From minor repairs and installations to complex plumbing projects, our experienced plumbers can handle it all. We only use the best materials and equipment to ensure that every job is done correctly, so you can rest assured that your plumbing system is in good hands with us.


Friday’s Plumbing has a team of Gas Safe registered engineers who can provide expert boiler and gas services. We provide a full range of boiler installation, repair, and maintenance services, as well as gas safety inspections. With our expert knowledge and cutting-edge equipment, you can be confident that your boiler and gas systems are in good hands.


Friday’s Plumbing provides expert heating installation services if you need a new heating system. Whether you need a new boiler, a complete central heating system, or any other type of heating installation, our team of experienced technicians can recommend the best options for your needs and budget. We only use high-quality materials and equipment to ensure that your heating system is properly installed and runs smoothly.


We specialise in the installation, repair, and maintenance of both vented and unvented cylinders at Friday’s Plumbing. Our experienced technicians can recommend the best option for your needs and budget, as well as ensure that your cylinder is properly installed and running efficiently. We also provide repair and maintenance services to ensure that your cylinder is always operating at peak performance.


Friday’s Plumbing provides underfloor heating installation services for a comfortable and efficient heating system. Our skilled technicians can advise you on the best underfloor heating system for your home or business and ensure that it is properly installed and running smoothly. Underfloor heating provides a warm and comfortable environment without the use of bulky radiators or heaters.


Keep your hot water flowing with Friday's Plumbing's unbeatable unvented cylinder services.

Don’t let a broken unvented hot water cylinder ruin your day. Our qualified engineers at Friday’s Plumbing provide expert servicing and repairs for all types of unvented cylinders. Our fixed-price service ensures that your system will run efficiently and efficiently, saving you money on energy bills. We’ll keep your hot water flowing at all times, from fault diagnosis to repairs.

Specialists in plumbing & heating installation & maintenance.

Customer satisfaction is our top priority at our Friday’s Plumbing & Heating Services. We are dedicated to providing plumbing services that meet the needs and expectations of our customers in their neighbourhood. We are committed to providing a friendly and professional service every step of the way, whether you require a large-scale installation or a minor repair.

Our expert plumbers are equipped with the knowledge and experience to handle any plumbing project, from routine maintenance to complex installations. We take pride in our work, ensuring that every job is completed to the highest quality and efficiency standards. You can be confident that when you use our plumbing service, your needs will be met with care and attention to detail.

Frequently Asked Questions

An unvented hot water cylinder is a type of water storage system that uses the mains water supply to provide high-pressure hot water. Unvented cylinders, as opposed to traditional vented cylinders, which use gravity to distribute hot water, use pressure to supply hot water to your home’s taps and showers. This makes them an excellent choice for households with high water demands because they can supply hot water at high flow rates to multiple outlets at the same time.

Because they do not require a header tank in the loft, which can lose heat through the roof, unvented cylinders are typically more energy-efficient than vented cylinders. They are also frequently outfitted with safety features such as pressure relief valves to prevent dangerous system over-pressurisation. If you’re thinking about installing an unvented hot water cylinder in your home, you should consult with a qualified plumber or heating engineer to ensure the system is installed safely and efficiently.

Yes, your unvented cylinder should be serviced annually by a qualified engineer. Regular servicing ensures that the system is running efficiently and helps to prevent potential problems such as leaks or overheating from occurring.

Unvented hot water cylinders have a number of advantages over vented cylinders. Because they are directly connected to the mains water supply, they provide higher water pressure and flow rates, resulting in a more satisfying showering experience. Furthermore, they provide faster heat-up times, ensuring that hot water is always available when you need it.

Unvented cylinders can also supply hot water to multiple outlets at the same time, making them ideal for larger households. They are also more energy-efficient because they do not require a header tank in the loft, reducing heat loss through the roof and lowering your energy bills. You can enjoy a more convenient, energy-efficient, and cost-effective hot water solution for your home by selecting an unvented hot water cylinder.

Unvented hot water cylinders, like any other heating system, can develop problems that necessitate professional intervention. Leaks, overheating, low water pressure or flow rates, and expansion vessel or pressure relief valve faults are all common issues. If you notice any unusual behaviour with your system, such as strange noises or odors, decreased hot water availability, or increased energy bills, you should contact a qualified engineer as soon as possible to diagnose and resolve the problem.

Attempting to repair problems on your own can be dangerous and result in further damage or injury. You can ensure that your unvented hot water cylinder operates efficiently and reliably by scheduling regular maintenance and addressing issues as soon as they arise.