Pipes into radiator.

[Chris12345678]

Hi, does it matter if I feed a into a radiator at the top and out the opposite bottom, is there much advantage?

Thanks.

 

[Best]

Not sure of your question?
If you mean on top to bottom piped rads - do they have to be diagonal, then answer is yes, they won’t work properly if piped to one side and won’t heat the opposite side well.

If you meant does top to bottom diagonal connected rads work slightly better than bottom connected rads, then answer is yes, the rad gives slightly higher output if feed into top and out the bottom connections and actually the specified output is for that

 

[king of pipes]

"Top and bottom opposite end" is the saying and yes it will work well many rads are piped like this especially commercially ie schools , hospitals and public buildings. Kop

 

[townfanjon]

Always used to be like this , just look a bit naff .
Each to their own eh

 

[Scott_D]

They have started doing it again in some new builds

 

[Chris12345678]

Thanks, I’ve seen it somewhere recently and it looked more efficient.
In our toilet we need to replace the radiator, currently it has in and out in the bottom.
The problem being that the TRV is bottom right which is just to the left of the toilet. Due to having a small boy, it is often covered in wee!
So the plan was to install the TRV top right, hopefully he can’t reavh it up there!

 

[Best]

Thanks, I’ve seen it somewhere recently and it looked more efficient.
In our toilet we need to replace the radiator, currently it has in and out in the bottom.
The problem being that the TRV is bottom right which is just to the left of the toilet. Due to having a small boy, it is often covered in wee!
So the plan was to install the TRV top right, hopefully he can’t reavh it up there!

Get the TRV swapped to other side of radaiator. They are bidirectional and can be installed flow or return.
I wouldn’t do top to bottom connections on rads on pumped circuits. It does look terrible

 

[Chris12345678]

Thanks, I didn’t realise they could go either end!

 

[rpm]

Don`t do it on column rads.

 

[Specren]

Not sure if this is the right thread.

Anyone come across microbore size that's smaller than 10mm and slightly larger than 8mm.

Took off a rad and need to connect new valves. 10mm too big. 8mm too small


Is there 9mm microbore pipe?

 

[Harvest Fields]

Not that I am aware of.

 

[Best]

Not sure if this is the right thread.

Anyone come across microbore size that's smaller than 10mm and slightly larger than 8mm.

Took off a rad and need to connect new valves. 10mm too big. 8mm too small


Is there 9mm microbore pipe?

How old is the pipework?
Old imperial 3/8” copper pipe is just slightly smaller in diameter to 10mm.

 

[Specren]

How old is the pipework?
Old imperial 3/8” copper pipe is just slightly smaller in diameter to 10mm.

Thanks Best. Yeh that is the case. I found fittings.

 

[Harvest Fields]

Didn’t think there was any of that stuff left. Learn something new every day.

 

[Best]

Didn’t think there was any of that stuff left. Learn something new every day.

I also never come across 3/8” pipe on heating systems. All 8 or 10mm but on systems installed mainly in mid 1970s onwards, so would be metric.
Oil pipes still around that are 3/8”.
Much harder copper than the 10mm and therefore easier to work with without risk of kinking it

 

[Specren]

I also never come across 3/8” pipe on heating systems. All 8 or 10mm but on systems installed mainly in mid 1970s onwards, so would be metric.
Oil pipes still around that are 3/8”.
Much harder copper than the 10mm and therefore easier to work with without risk of kinking it

The owner told me the builder who owned it before, installed the Pipe work and roads.

Typical. Cheap pipe being imperial.

 

[Rob Foster]

Not sure if this is the right thread.

Anyone come across microbore size that's smaller than 10mm and slightly larger than 8mm.

Took off a rad and need to connect new valves. 10mm too big. 8mm too small


Is there 9mm microbore pipe?

There is some wacky refridgeration microbore which is imperial
and american od and fits nothing in our world without wiping it up a bit to get a decent joint....look in BES gas controls catalogue ...****ography for
plumbers, gsr and heating engineers
Rob Foster aka centralheatking

 

[Welder]

...the rad gives slightly higher output if feed into top and out the bottom connections and actually the specified output is for that

It was only 'fashion' that changed it. Just like door hinge sides.