No heat in airing cupboard

[shaggy]

Hi, we've just moved into a new property which has a sealed high pressure hot water/heating system. The airing cupboard has no water tank in it, but does have a pipe running up from the floor, with a flexivalve at the top, and a pipe T'ed off it coming back down to the floor. There is a red tap at the bottom of one pipe. When the central heating is on I would expect the airing cupboard to get hot (or at least the pipe to get hot), but although all the radiators warm up as they should there is no heat at all in this pipe. Does anyone have any ideas about what really obvious thing (yes, I've turned the tap on) I've missed?

Thanks in advance

Simon

 

[shaggy]

Thanks guys. Steveb, there's no rad, and the pipes are off the hot water circuit. jts - I'll check the gate valve, thanks for that.

S

 

[PlumbBobBob]

Thanks guys. Steveb, there's no rad, and the pipes are off the hot water circuit. jts - I'll check the gate valve, thanks for that.

S

sorry i wasnt replying to you but barrelboy