I have an 8mm microbore central heating system - fully pumped. I want to add a time switch controlled zone valve to control one radiator in a room which is only used at certain times of the day. The only zone valves I can find are 22mm. Do I really have to use a 22mm to 8mm reducing arrangement, or is there an alternative, such as an 8mm valve somewhere out there, or using something other than a motorized heating valve? Solenoid valve perhaps?
Any advice much appreciated.
Regards,
JMcG