Header Tanks


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Copper & Stainless Steel Header Tanks

Header tanks, also called feed and expansion tanks, are used in all vented hot water and central heating systems, as a means of supplying a particular appliance or system with cold water, as well as taking up any expansion that comes as a result of the water being heated up.


A copper or stainless header tank has the same purpose as a plastic header tank, except that it provides extra protection where water can get exceptionally hot in solid fuel installations. Unlike many plastic header tanks, our copper header tanks come with all water connections pre-installed.


The main benefit of using a copper or stainless header tank to feed your hot water cylinder or heating system is that, unlike the more common plastic tanks, they will not be susceptible to melting or warping due to prolonged overheated water. This can be a particular problem on a system which incorporates a solid fuel boiler or uncontrolled heat source, as they are capable of heating the water to in excess of 100°C.


Our feed and expansion tanks have the following features as standard, which saves installation time and provides overheating protection all round.


  • Manufactured in copper or stainless to prevent tank melting and deformation
  • Pre-installed float valve with copper float
  • Pre-installed cold feed connection in 22mm compression
  • Pre-installed overflow connection in 22mm compression ready to add copper overflow pipe
  • Insulation fitted to tank
  • When used with a thermal store, float arm is pre-adjusted

  • We supply the header tanks pre-insulated with spray foam insulation on round units and insulation board on the rectangular units, both to a depth between 25mm and 30mm. This will help to contain any heat that is returned to the header tank by expansion, increasing efficiency, but also eliminating the risk of frost damage.

    Header Tank

    Technical Information


    Copper Header Tanks
    Height Diameter Literage Max System Size
    285 400 20 213
    285 450 25 280
    400 400 35 557
    350 450 35 526
    310 500 35 493
    385 450 400 658
    390 500 50 867
    480 450 55 1018
    Stainless Header Tanks
    Height Diameter Literage Max System Size
    291 375 18 246
    291 400 20 277
    291 450 25 351
    291 500 35 433
    388 450 40 717
    391 450 45 730
    388 500 55 887
    450 500 65 1176

    Diagram

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