Radiators feed on 15mm pipe

[Fallout]

Hey I have 3 radiators that are fed off 15mm pipe a 1600P plus a 1800 double and a 400double is this ok? Or does it need taking up to 22mm till it tees off for the 1600 P plus. Then 15mm to the 1800 double and 400 double? What are the consequences if the pipework is undersized?

 

[tomy]

Consequeses are the rads dont get hot , I would never feed more than two rads off 15mm pipe .

 

[Fallout]

ok so does it realy need taking up to 22m so that the 15mm is only feeding 2 raditor not the 3 it currently is

 

[Bahco]

I would try balancing first Read here and if no joy then change to 22mm

 

[caesarmanager]

Thanks I ve got the system drain at moment so mite change it for the sake of an hour or so's work doesn't a 1600 P plus, 1800 double and a 400 double sound alot of 15 mm ?

 

[Bahco]

1600 P plus, 1800 double and a 400 double sound alot of 15 mm ?

Most definitely a good idea to run the 1800 off the 22 at least.

 

[caesarmanager]

how much is a length of 22mm copper these days?

 

[Bahco]

Probably around £13

 

[muggles]

Probably around £13

And the rest, I asked in Plumbase a couple of weeks ago how much they were charging the man off the street for 15mm now and it was around £11+VAT a length.