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OSO Cylinders

Heating Hot Water Cylinders

Hot water cylinders for heat only and system boilers

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Many of our products are unique in their compact design, ease of installation, performance and energy efficiency, we can provide cylinders for domestic hot water to suit all requirements either as stand-alone electric direct water heaters or to work in combination with a gas boiler, ASHP or renewable heat source.

Our DELTA COIL cylinder is the only fully A Rated efficient range of cylinders available in the UK and can provide a saving of up to 400kW/h per annum on utility costs, and our SUPER SERIES range is a pre-plumbed cylinder, with virtually all components, pipework and cabling concealed it also incorporates an internal blending valve meaning a smaller more compact cylinder can be used to provide the equivalent output of larger cylinders. Super Series is a low maintenance, easy to install product that is reliable and compact, we can also provide washing machine frames to maximise the use of space in apartments and smaller properties that have been tested for use with our SUPER SERIES range.

OSO ensure that our products surpass safety and performance requirements set out in The Building Regulations and Standards. Stress and performance tests on all products safeguard the integrity and life cycle of our products. The end result is well-known OSO quality, which has shown outstanding product life expectancy.

Hold Your Horses!

Some information on this page is just for members – it might include pricing, contact information and other sensitive details that we need to keep to ourselves.

Please log in or sign up as an LNPG member to continue.

Buying Instructions

Special contract rates have been set up with Wolseley UK for LNPG members only, meaning that they can purchase our products cheaper through the LNPG arrangements with Wolseley UK cheaper than non members. Our LNPG rates are also more competitive than standard merchant or consumer buying.

For more information and pricing, head to our Wolseley page here.

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Prices can be found on the full Wolseley price list on their page of the website.

Contact Information

You can contact the Wolseley National Plumbing & Heating Support Contacts here.

Webinar Library New Feature

Fancy catching up on what OSO Cylinders are up to? Well you’re in luck.

The videos below are edited clips from our Lock-In series, where we sit down with the people behind the scenes and discuss hot topics and upcoming updates.

If you want to view our library of past episodes with all our partners, click here.