Any heating engineers out there?

[the stoat]

Do we have any heating engineers that can identify this brand of valve?  Getting a like for like will save changing pipes / connections.

Thanks in advance.

[glenbo]

Caleffi part number 314430 give advanced water a call they should have them in stock 01386 760066. 

Is it passing? Ie dripping from the pressure relief pipe. 

[the stoat]

Thank you very much, yes it is leaking.  The water bill being several times prompted a search for leaks.

[glenbo]

Are you topping the pressure up on your heating system? 

[the stoat]

No topping up as everything seemed to be working ok.  On trying to top up all it did was leak back past the valve.