Ariston Expansion Vessel & Non-Return Valve
- Home Delivery Order by 7pm (4pm Saturday & Sunday) for next day delivery.
- Click & Collect Order by 7pm (4pm Saturday & Sunday) for next day Click & Collect - Select store
- 45 day returns policy. Read our returns policy
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This expansion vessel and non-return valve is ideal for use with the .
- Guarantee - 1 year
Help & Advice
BTU Radiator Calculator
Our BTU (British Thermal Units) calculator will help you to work out the heat requirement for your room, and recommend the number of radiators you will need to comfortably heat it.
What is a BTU?
A British Thermal Unit (BTU) is a measure of heat output from a radiator. Depending on the size of your room, the number and type of windows and what the room is used for, you'll need more or less heat. If you have a higher BTU requirement, it might be better to use more than one radiator to deliver the heat you'll need to a room. The total BTU output of several smaller radiators may meet your needs.
How do I choose the right radiator?
The BTU value of all our radiators is clearly labelled in-store and online, helping you find those which suit your requirements.
Step 4: View your results
How to guides
Pipes and fittings vary by home and by length, shapes and connectors. Thankfully, this is no longer a problem and there are lots of different solutions to make your pipework secure and reduce the risk of leaks.
Plumbing comes with a whole catalogue of specialist tools. If you're going to do the job, make sure you get the right ones.
Choose a convenient delivery date on 1000s of products
45 day returns policy
Arrange collection or return to store.Customer support team - 0333 014 3357
Free delivery on standard orders over £50
Excludes Large and Bulk delivery
Oversink Frontal knob for easy temperature regulation. Robust internal 4 bolt flange for increased durability. Suitable for- Washrooms, utility rooms or garages Comes with - Built in heating lamp to show heating cycle in process Installation in 10 Steps
Helps to conserve heat from your hot water pipes and prevent freezing of cold water pipes Fits a 15mm pipe Guarantee 1 year