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40L 400 (16") x 450 (18") Copper Header Tank

Price: (Inc VAT)
£287.59 (inc VAT) £239.66 (exc VAT)
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Product Description

Great value 400 x 450 copper header tank with capacity of 40 litres - height and diameter measurement does not take lagging into account (see below).

Complies with current building regulations (Part L), is ERP band C and included in the price is a 2 year guarantee. 

The cylinder price includes VAT and is available to ship ASAP

A header tank (or feed and expansion tank) is common to all vented hot water and central heating systems. It can be used to keep the system topped up with water and it can take up any expansion in system fluid as a result of water heating up.

Copper header tanks are arguably better suited for use on systems where the water can become very hot - such as in thermal stores, solid fuel systems or in systems where the heat source is hard to control.

Often, boiler stoves used in open vented systems require these high temperature header tanks. The vent pipe from the boiler stove goes into the top of the feed and expansion tank. If, for some reason, the system overheats, the resulting steam vents safely into the header tank. The tank can potentially get very hot, in some cases above 100ºC. Should a plastic tank become soft and potentially spill the contents this would be extremely dangerous, so why take the risk? We can supply header tanks with a high temperature tolerance, made from copper, which are insulated as well to decrease the chance of them freezing in a loft. The header tank comes with a lid as well as a fitted copper ball valve and brass arm.

  • Includes lid plus copper ball valve and brass arm (not fitted)
  • Cold out connection is 1inch BSP female 
  • 2 Year Manufacturer Guarantee
  • Delivery approx 5 working days (call 0113 871 5 871 if you need it more quickly)
  • Manufactured by Gledhill.
  • Capacity of 40 litres
  • Cylinder includes FlexiLag Insulation - 35mm comes as standard making the overall diameter approximately 520mm. 
  • Part L Compliant
  • Produced under BS EN ISO 9001:2000 Quality Systems
  • Please note, overflow fitting is not included with this cylinder. 


Please note: this cylinder is unavailable for return due to it being a rare size and shape.

Customising Your Cylinder

If you’re replacing a hot water cylinder we can make the job a little easier by creating a customised size cylinder and where the location of the connections should be. Click here to download our custom cylinder form and mark on as much information as possible. Once this is complete you can email it to sales@coppercylinder.co.uk for a quote.


At coppercylinder.co.uk we keep our prices low by manufacturing all orders received through our store rather than keeping stock of vented copper cylinders. Every cylinder is tailor-made specifically to your requirement therefore we do not accept returns of any incorrectly ordered cylinders. If there is anything you are unsure of please don't hesitate to contact us 0113 871 5 871 or sales@coppercylinder.co.uk. See terms and conditions for further info.

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