OSO Hotwater UK Ltd is a leading supplier of mains pressure unvented hot water cylinders. OSO’s strength lies in innovative design and quality of manufacture from its Norwegian factory. OSO has a long international reputation for environmentally conscious production methods. Please explore this website to gain a full understanding of OSO products, including these bestsellers:
 
 
A full listing of the different OSO water heater series can be found on the Products page.
OSO Hotwater UK is proud to be an exhibitor at PHEX - the Plumbing & Heating Exhibition: