Unvented Cylinder Installation: Benefits & Upgrades in Southwater & Horsham

July 2026 Mend Your Home Installations

Tired of weak showers and waiting forever for the bath to fill? If your home still relies on an old gravity-fed system with tanks in the loft, it's time for an upgrade. Unvented hot water cylinders (like Megaflo) are revolutionizing hot water delivery in homes across Southwater, Horsham, and West Sussex.

What is an Unvented Cylinder?

Unlike traditional "vented" systems that rely on gravity from a cold water tank in your loft to push water down to your taps, an unvented cylinder takes its water supply directly from the cold water mains.

Because the water is heated under mains pressure, it delivers hot water to your taps and showers at an incredibly high flow rate, completely eliminating the need for noisy, expensive shower pumps.

Top 4 Benefits of Upgrading

Mains Pressure Showers

Say goodbye to weak dribbles of hot water. You will enjoy high-performance, mains-pressure showers across multiple bathrooms simultaneously without flow drops.

Free Up Loft Space

Unvented cylinders don't require cold water storage tanks or expansion tanks in the loft. Removing these tanks frees up massive amounts of storage space or allows for a loft conversion.

Cleaner, Safer Water

Loft tanks can become contaminated with dust, debris, and insects over time. Unvented systems are completely sealed, meaning your hot water comes directly from the clean mains supply.

Silent Operation

No more noisy loft tanks filling up in the middle of the night, and no more loud shower booster pumps buzzing every time someone turns on a tap.

Do You Need a G3 Qualified Installer?

Yes, absolutely. Because unvented cylinders operate under highly pressurized conditions, it is a legal requirement in the UK that they are installed and serviced exclusively by plumbers holding a G3 Unvented Hot Water qualification.

At Mend Your Home, we are fully G3 qualified and Gas Safe registered. We safely install, service, and repair Megaflo and other leading unvented cylinders across West Sussex.

Ready for Better Hot Water?

If you live in Southwater, Horsham, or the surrounding areas and want to upgrade your home's hot water system, contact us for a free, no-obligation quote.

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