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18 Litres Insulated & Fully Assembled Expansion Tank

Out of stock
£102.78 £85.65

This product is currently out of stock, for more details please contact 01777 237 933.


Lead Time
5-7 working days.
Delivery Cost
Free UK Mainland Delivery


More Information
Weight - kg 9
Width - mm 320
Length - mm 540
Height - mm 350
Capacity - Litres 18
Suitable for Drinking Water (Potable) No
WRAS Approved No


This water tank is a complete solution for a feed and expansion tank. These are used to supply water to the radiator circuit. The tank comes complete as standard – insulated with a high density specialised fibreglass. The only extras you need are the copper tubes/pipes. 

Loft water tanks are mainly used as part of a gravity fed (fully vented) central heating system. 

This WRAS approved loft tank complies with British standards to hold potable water. This product can be used as a replacement tank, extra tank or to be installed in new builds. 

Kit includes (all pre-fitted):

Byelaw 30 kit; which includes;

  • Screened warning pipe elbow
  • Dip tube
  • Ball valve back plate (suitable for ½” or ¾” ball valve)
  • Plastic support washer
  • Rubber sealing washer
  • Screwed breather 
  • Screwed vent pipe sleeve

Also included;

  • Snap on lid
  • ½” BS1212 Part 2 ball valve
  • 4½” Float
  • 22mm compression tank connector
  • 15mm x½” angled service valve
  • Installation instructions


  • Length: 540mm
  • Height: 350mm
  • Width: 320mm

This product comes with a 12 month manufacturer’s warranty.