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900 (36") x 450 (18") Combination Hotwater Cylinder

Price: (Inc VAT)
£285.87 (inc VAT) £238.22 (exc VAT)
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Product Description

Great value 900 x 450 direct combination copper tank (36x18 approx inch measurement) 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

  • All connections 1inch BSP for 22mm pipe, except immersion boss which is 2.25inch BSP. 
  • 2 Year Manufacturer Guarantee (Mannley Cylinders)
  • Price Includes VAT
  • Manufactured in West Yorkshire, UK.
  • Suitable for 10m working head. Higher pressure/working head may require a different grade of cylinder which affects cost, please call 0113 871 5 871 or email sales@coppercylinder.co.uk to discuss.
  • Holds 85 litres of hot and 20 litres of cold water.
  • Cylinder includes FlexiLag Insulation - 35mm comes as standard making the overall diameter 520mm. Thicker (50mm) lagging is available on the checklist.
  • Part L Compliant
  • Produced under BS EN ISO 9001:2000 Quality Systems
  • 36 x 18 inches
  • Drain off boss at 100mm
  • Boiler connections at 100mm and 300mm (these can be blanked off if you wish to heat solely by immersion heater)
  • Height of hot cylinder approximately 610mm, height of cold cylinder approximately 275mm
  • Side entry immersion boss at 150mm
  • An extra immersion boss can be added to this order (see checklist above) so it can be powered by two immersion heaters
  • Please note, overflow and ball balve fittings are not included with this cylinder. It is possible for us to make holes for the 15mm balve valve and 22mm overflow on request but we need to know where they are on the cylinder so please email over a filled in bespoke cylinder sheet with the order (click here) if this is what you need.


Please see diagram (schematic may differ slightly to cylinder, all measurements +/- 10mm) and chart below for more information, you can also speak to a sales advisor on 0113 871 5 871 or sales@coppercylinder.co.uk



Please note: this cylinder is unavailable for return as per our terms and conditions section 4: https://www.coppercylinder.co.uk/terms-conditions/ .

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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Product Reviews


    Posted by on 29th Feb 2016

    needed to replace a direct combi 900 x 450
    cylinder supplies were the best price i could find after a lot of looking !
    very helpfull phone staff
    very quick delivery

  2. All good 5 Star Review

    Posted by on 26th Oct 2015

    Fast (next-day) delivery as promised. No problems. thanks

  3. Great Value & Service 4 Star Review

    Posted by on 23rd May 2013

    Purchased 10no. combination cylinders for delivery to Ireland. Great value for these products (twice the price over here!), excellent, helpful, efficient & friendly service, extremely reasonable shipping costs & fast delivery. Cylinders not yet installed, but very happy with experience to date & will definitely be back.


    Posted by on 20th Jan 2013

    the whole deal went very smoothly. young ben in sales was particularly helpful. the product arrived promptly and in good condition. the cylinder itself seemed well made, of good quality, and conforming to the relavent bs standard. delivery was made at 09.30am and hot water was flowing by 12.30pm. the item was competetivley priced and located on line. very pleased, many thanks.

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