Central heating valve

[elevonic]

Hi all, can anyone identify the manufacturer of the valve in the attached photo, I'm hoping the B within a hexagon is a clue. It's playing up, letting hot water into the upstairs radiators when the hot water is being called for but not the heating.

 

[ianmcd]

That is a check valve (non-return valve) and any 22mm check valve can be used, it is possible but would be unusuall that this is your culprit, do you have one x 3 port valve (Yplan) or 2 x 2 port valves(S Plan) to control your heating and water ?

https://www.screwfix.com/p/single-check-valve-22mm/61237

 

[elevonic]

That is a check valve (non-return valve) and any 22mm check valve can be used, it is possible but would be unusuall that this is your culprit, do you have one x 3 port valve (Yplan) or 2 x 2 port valves(S Plan) to control your heating and water ?

https://www.screwfix.com/p/single-check-valve-22mm/61237

Its on a thermal store system, no 3 port valves, just a pump for the boiler flow, and another for the heating. When the store calls for heat the boiler pump starts but the upstairs rads get hot, none of the other rads.

 

[ianmcd]

see you forgot to mention that part , always usefull to know as we dont have crystal balls, that one that I posted the link for will do as will any single 22mm check valve. are you saying that when only HW is called for that the pipe below that valve is heating up ?

 

[elevonic]

see you forgot to mention that part , always usefull to know as we dont have crystal balls, that one that I posted the link for will do as will any single 22mm check valve. are you saying that when only HW is called for that the pipe below that valve is heating up ?

Yes, the pipe leading upstairs gets hot as the store heats up, the heating pump isn't coming on, just the boiler pump.