I need to work out which pipe is the flow and which is the return, all the existing boiler/pump/cylinder and tanks have been riped out (not by me thats why I need to know)
All that is left is the two 22mm pipes coming out of the kitchen ceiling leading to the micro bore manifolds under the upstairs landing leading to all the radiators.

One of the 22mm pipes has a 15mm tee'd off of it in the kitchen which then runs up to the old airing cupboard and is cut off just above the floor, but the 22mm part of the run is connected to one of the manifolds,

the next 22mm pipe running from the kitchen to the airing cupboard is cut off above the floor which I presume went to the pump and immersion tank and then to the other manifold, so does anyone know which is which.

I hope all this makes sense because I know what I'm trying to say but don't know how to say it

 

can ya undo a fitting on a rad and then blow down pipe or use some sort of pressure (nitrogen)?

 

what will this tell me? I still won't know which one used to be the flow & return, if it was ill still conected I could of just turned it on to see which on heated up first.

 

the one that had the pump on it will be the flow

 

flow always goes to the rad valve end ?

 

Really?, what if the rad dont have a TRV, and the rad valve caps are the same!

Tosh,

Do you know what the existing boiler was? (Make)

 

Cheer pal thats what I thought just needed reassuring, why is there a 15mm branch coming off of it?

 

lol didnt know if rads had valves or not was just saying and trying to help 8)

 

I did try tracing the micro-bore feeds back to the locksheald valves knowing that they should be on the feed run but they are all different

 

[quote=tosh;4295841]I did try tracing the micro-bore feeds back to the locksheald valves knowing that they should be on the feed run but they are all different [/quote

Nowadays its doesn't matter if the flow goes to the trv or the lockshield as they work on either pipe now (trv's) trv's use to have to only be on the flow as they would only work one way. (now the water can flow either way through the trv)

If you don't have anything attached at either end of the pipework then you can use which ever works the best way for you,

TBH I hate mirco bore and if I were you (and money allows) I would rip it all out,

15/22mm pipework imo is the best way

 

Sorry for my sudden disappearance AOL crap yet again and a long confusing conversation with someone in a warmer climate and speaking a different language, "OH my life is full of problems"

Right were was I, the old boiler was a Myson Economist WM25/40 probably about 20 yrs old

 

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