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Unvented Cylinders
Unvented Cylinders

Unvented Cylinders

Browse our extensive collection of unvented cylinders designed to efficiently cater to your hot water needs. From unvented direct to indirect cylinders and expansion vessels to mounting brackets, enjoy exceptional quality and value when shopping with BES.

Take advantage of competitive prices and efficient delivery options when shopping online with us. With free next-day delivery available on qualifying orders, getting the unvented cylinders you need promptly has never been easier.

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A Comprehensive Range Of Unvented Cylinders

Our range of unvented cylinders includes products from top manufacturers such as King Span, Pump House, Tesla, RM Cylinders, Zilmet and Eres:

Unvented Direct Cylinders

Explore our range of Ultrasteel Unvented Direct Electric Cylinders, renowned for their reliability and efficiency. Popular models include the Ultrasteel Unvented Direct Electric Cylinder with a 180-litre capacity, perfect for households with moderate hot water demands.

Unvented Indirect Cylinders

Opt for the Ultrasteel Unvented Indirect Cylinder series for superior performance and energy efficiency. Our range includes models like the Ultrasteel Solar Unvented Indirect Cylinder, which are available in various capacities to suit your requirements.

Stelflow Direct

Experience the reliability of Stelflow Direct cylinders, known for their robust construction and longevity. Choose from a range of capacities, including the Stelflow Direct - 90 Litre and the Stelflow Direct - 250 Litre.

Stelflow Indirect

Achieve optimum hot water supply with Stelflow Indirect cylinders designed to deliver consistent performance. Consider options like the Stelflow Indirect - 180 Litre for a reliable hot water supply in your home.

Expansion Vessels

Ensure the proper functioning of your unvented hot water system with our selection of expansion vessels. Choose from reputable brands like Zilmet and Eres, available in various capacities to accommodate your system's needs.

Immersion Heaters

Enhance the heating efficiency of your unvented cylinder with our range of immersion heaters. Explore options like the Immersion Heater 14" Incoloy for reliable and consistent heating performance.

Mounting Brackets

Simplify installation and ensure proper support for your expansion vessel with our range of mounting brackets. Choose from different sizes to accommodate vessels of various capacities.

PRV Assembly

Ensure safety and functionality with our Caleffi PRV & Monobloc Manifold Assembly, designed to regulate pressure and maintain optimal performance in your hot water system.

Pressure Relief Valves

Maintain optimal pressure levels and prevent damage to your system with our selection of temperature and pressure relief valves. Choose from various pressure ratings to suit your system's requirements.

Service Valves

Facilitate maintenance and servicing of your expansion vessel with our range of service valves. Choose from different sizes and configurations for ease of use.

T&P Relief Pumps

Ensure safety and prevent pressure build-up with our High Temperature & Pressure Relief Pump, designed to maintain optimal conditions in your hot water system.


Complete your hot water system with our Dry Trap Tundish, designed to safely discharge excess water and prevent potential hazards.

Why Choose BES for Unvented Cylinders

At BES, we pride ourselves on offering a wide selection of high-quality unvented cylinders that meet industry standards for performance and durability. With a commitment to excellence and over 45 years of industry experience, we provide a seamless shopping experience, efficient shipping options, click and collect and exceptional customer service.

We also recommend checking out all our vented and unvented cylinders, flanges and immersion heaters before heading to checkout.

Unvented Cylinders Delivered In A Hurry

With free delivery on qualifying mainland UK orders and over 15,000 products in stock, we make sure your order gets shipped directly to your door promptly.

If you need assistance or help finding the right products, contact us at 0800 801090 – our team is here to help you every step of the way.

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