water in me rads but not boiler

[whorlicks]

hi' drained and refiled but no water in me boiler ..tried bleeding pump water there...theres a drain valve in the pipes behind the boiler but it wont spit any water out. shone a torch up there and you can see the valve moving. also theres a strange looking valve in the same loop dunno what it is or does? any help...am i draining it right in the first place ?
solid floors with a loft conversion..
indirect ..gas...s plan.. thanks..

 

[djbunny]

what boiler you got and does the pipework rise from boiler or drop?

 

[whorlicks]

hi' its an ideal w2000..the boiler is above the cylinder and pump...the pipes rise into the roof space .but there is a loop with a drain valve in that seems lower than the boiler but i cant get any water from it...
being supid i drained the cylinder and the offending radiator..
in the loft there are 2 vertical bleed pipes which i've done and water comes out... i just don't understand how i can get water back in my radiators but not in the boiler.
the loop seems to be on the lower pipe from the boiler ..any help ?

 

[djbunny]

is the boiler the highest point in the system?

 

[whorlicks]

yes.. there appears to be an unusual drain valve in a loop just below the boiler and also a normal drain in the same pipe..neither of these will let anything out..
my friend has a vacuum pump. is it ok to use it on the drain below the boiler ?