Re pressure heating

[Thomas2310]

Hi, I am looking for some help. I am replacing 2 radiators at home & I have been told I will need to re-pressure the system after fitting them. I have done this before at my last house as I could easily find the filling loop. The problem is I have looked up & down on the boiler and cannot find the filling loop anywhere. The model is a slimline classic FF360. I have removed the cover but can't find the pipe I'm looking for. I also have a large tank upstairs in a cupboard with a small tank above it if that's anything to do with it ? Thanks in advance for any help. Nearly forgot, can't see a pressure gauge either.

 

[Harry Bloomfield]

You don't suppose it might be an 'open vented' system then?

Stop the small tank filling, then drain it all down, fit your rads, then refill and bleed - not forgetting to add inhibitor.

 

[Thomas2310]

Thanks for the reply. Yes it might be what you say. I remember the plumber who fitted a radiator for me 2yrs ago drained the full system. I thought the job was a bit costly that's why I thought I might try it myself. Thanks