Open Top Rectangular Cold Water Tanks


Ferham open top rectangular tanks are available in 4 gallons (18 litres) capacity.

Our open top rectangular cisterns can be easier to fit through tight loft hatches. Open top gives full access for fitting all components, making the tank substantially quicker to fit.

These header tanks are manufactured in accordance with BS4213:2004 using highly durable moulded plastic that is WRAS approved and can be purchased with or without the accessories kit

 Request a quote  


Open Top Cisterns Rectangular Spec Sheet

Cold Water Cisterns Product Guide

Product Information

  • Suitable for storage and supply of cold potable water to an open vented cylinder or use as expansion tanks in vented heating systems
  • Roto-moulded from approved hygenic polypropylene plastic
  • Manufactured to BS4213:2004 from WRAS approved materials
  • Accessories kit including close fitting lid, backing plate and 60mm insulation jacket with ties available to purchase separately
  • 1-Year Guarantee against manufacturing defects
  • Available in 4 gallons / 18 litres capacity
Capacity Height Width Depth Code Code
Gallons Litres (mm) (mm) (mm) CISTERN KIT
4 18 330 296 442 FC4G BK4G


Planet Passionate
Through our new Planet Passionate 10-year groupwide sustainability programme, we aim to make significant advances in the sustainability of our business and of our products.


Contact us

Contact our experienced customer service team today for professional advice on our cold water storage tanks.

Contact Kingspan Hot Water Cylinders