Check Valve, or not

[hitandmiss]

I've got a problem with CH radiators heating upstairs, when CH is turned off, and hot water is turned on. I believe this is a common problem with gravity fed hot water systems.

I believe the cause of this is that the CH system is as good as acting as a gravity fed heating system itself. Looking around a number of posts, a solution suggested is to fit a check valve into the CH circuit, to stem the flow of water.

Is this correct, and where would the check valve need to be fitted ? Does it need to be fitted on the pump side, if so, before or after the pump ...

Bit of a novice when it comes to CH, any advice would be appreciated

 

[namsag]

Good chance one is already fitted and is seized partially open.

But if not it should go on the CH flow pipe on about 2 foot from boiler

 

[malkie]

What boiler have you got in,if you can get accsess to the pipework easy enough by the boiler just fit one coming off the flow,is it a back boiler ?

 

[hitandmiss]

in work at the mo, so not sure the exact model of boiler. As far as I can remember it's a Baxi, is free standing in a downstairs cupboard, with fairly easy acces to all pipework.

Sorry can't be more technically accurate