Hi Iam just replacing my centrel heating boiler but the system in my house is on gravity hot water. I have got to change it over to a fully pumped system. Does anyone know if its ok to leave the cold feed and expansion pipes on the cylinder coil pipes where they are and fit the pump and motorised valves to the return line of the boiler. This would mean the vent pipe was constantly open to the boiler but the cold fill will only have access to the boiler through the cylinder coil and down the flow pipe to the boiler unless the hotwater valve was open. Thanks Roo
- posted
16 years ago