Pipe centres are defined as the distance between the middles of the two pipes used to connect to the radiator. For different directions of the radiator ports the connected valves will have an effect on the overall distance. Check the 3 possibilities below

• Ports on the outside of the radiator.
  • Pipe centres in specifications table + 90mm. When using valves not supplied by us the 90mm may be different.
• Ports underneath
  • Pipe centres as listed in radiator specifications table
• Port on the inside of the radiator.
  • Pipe centres in specifications table - 90mm. When using valves not supplied by us the 90mm may be different.