Unvented Cylinder Installation Derbyshire

High-Pressure Hot Water Systems by ISM Plumbing & Heating

If your home suffers from weak hot water pressure—or you’re planning a bathroom upgrade or extension—an unvented hot water cylinder could be the perfect solution. I’m Ross, owner of ISM Plumbing & Heating, and I’ve been installing high-performance hot water systems across Alfreton, Sutton-in-Ashfield, Ripley, and the wider region for over 15 years.

Recently, we upgraded a family home in South Normanton that had constant complaints about slow-filling baths and low-pressure showers. Their old open-vented tank system just couldn’t keep up. We installed a modern 210-litre unvented cylinder, and the difference was immediate. Strong, balanced hot water to every tap—even with two showers running at once.

Whether you're replacing a traditional cylinder, switching from a combi boiler, or preparing for a loft conversion or house extension, we’ll design and install a system that suits your home, usage, and long-term needs.

Why Choose ISM Plumbing & Heating for your Unvented Cylinder Installation?

What’s Included in Our Unvented Cylinder Installation

Our full-service installation includes everything needed for a safe, efficient upgrade:

- Free home survey and system design

- Supply and installation of a high-quality unvented cylinder

- All pipework, expansion vessels, valves, and safety components

- Integration with your existing boiler or heat source

- Full system commissioning

- Building control notification and compliance documentation

- Optional servicing plans to keep everything running smoothly

We install both standalone unvented systems and cylinders designed to work alongside system boilers or renewables like solar or heat pumps.

Why Choose an Unvented Hot Water Cylinder?

Unvented systems deliver hot water directly from the mains, offering:

- Strong, consistent pressure at all outlets

- Simultaneous supply to multiple bathrooms

- No need for loft tanks—free up space

- Improved hygiene and reduced maintenance

- Compatible with modern boilers and renewable systems

Perfect for family homes, renovations, or larger properties with growing hot water demand.

Trusted Cylinder Brands We Install

We only fit unvented cylinders from trusted manufacturers with excellent reliability and warranty support, including:

- Heatrae Sadia Megaflo – Industry-leading performance and efficiency

- Gledhill – Compact, space-saving options for all home sizes

- Telford – UK-made, renewable-ready cylinders

- Worcester Bosch – High quality with strong aftercare support

We’ll help you choose the right make, model, and capacity based on your household’s needs.

Local Installations, Built for Local Homes

We’ve installed unvented cylinders in a wide variety of properties throughout:

- Alfreton, Somercotes, and Swanwick

- Sutton-in-Ashfield, Stanton Hill, and Skegby

- Ripley, Codnor, and Heage

- South Normanton, Tibshelf, and Pinxton

Whether it’s a tight airing cupboard, a full heating upgrade, or a new extension, we’ll plan the install carefully and keep everything neat, safe, and regulation-compliant.

Certified, Compliant & Safety-Focused

You're in safe hands with ISM Plumbing & Heating:

- G3 Certified for unvented hot water systems

- Gas Safe Registered for boiler and integration work

- Fully insured and Building Regulations compliant

- Manufacturer warranties and full paperwork included

We handle all notifications to building control and provide you with full compliance documentation.

Why Choose ISM Plumbing & Heating

- Over 15 years of domestic hot water system experience
- G3-qualified to install and maintain unvented cylinders
- Fully Gas Safe Registered for boiler integration
- Local, honest, and highly rated service
- Compliance paperwork and building control notifications included

Real Stories from Local Customers

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“Having contacted Ross after finding his number on yell.com he came out within a couple of hours and fixed the problem. Very professional and reasonable price to. I would definitely recommend.”
— Zoe (via Yell)
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⭐⭐⭐⭐⭐

"Ross worked very conscientiously working to installing a new boiler and explained how the system was to be operated. I was very pleased with how the installation was undertaken and would have no hesitation in recommending Ross to anyone who was, similarly, in the need of a new boiler and a Gas Safe Installer to complete the work."
— Anonymous (via Trusted Trader)
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"Ross provided fast and friendly service at a very reasonable price for a boiler repair. We were up and running within 24 hours, including ordering the part and a follow-up visit to fit it."
— Ali (via Google)
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