Central heating needs vent pipe

[Thomsonminis2]

I have a vented central heating with no hot water cylinder my boiler and pump is in shed outside pipes run up stairs through the bedrooms to radiators then down to radiators on ground floor I have no vent pipe in system expansion tank is in loft to fit a vent pipe can I move pump up stairs before first radiator and take vent pipe into loft expansion tank any help great fully received

 

[gas112]

I have a vented central heating with no hot water cylinder my boiler and pump is in shed outside pipes run up stairs through the bedrooms to radiators then down to radiators on ground floor I have no vent pipe in system expansion tank is in loft to fit a vent pipe can I move pump up stairs before first radiator and take vent pipe into loft expansion tank any help great fully received

what makes you want to fit a separate vent pipe does your boiler instructions say it needs one ?

 

[Elsa TLC]

The cold feed also works as an expansion pipe.

 

[Thomsonminis2]

I just presumed I needed one because it had a vent tapped of the pipework where the heating pipes went into coil on hot water cylinder before it was removed

 

[Johntheo5]

The cold feed should be 22mm diameter with no isolation valve between the F&E cistern and where the cold feed is teed into the system.

 

[Thomsonminis2]

Thanks for the help guys I will remove gate valve on feed to boiler saved me work that I didn’t need