is it essential to replace 10mm piping with 15mm for new ch

[jammiev]

hi, we have a 30 year old boiler and central heating system.
is it essential to change the piping (10mm copper) if we were to have a new boiler and rads installed?

thanks

 

[Deleted member 105431]

depends if all the existing radiators heat up effectively. If you can afford it 15mm would be better.

 

[jammiev]

hi, yes, at the moment they all heat up ok.

 

[gasandoilman]

just to add to the good advice above you should make sure they power wash if your keeping the 10mm

 

[simond]

If you mean Powerflush, it is ineffective for ubore and not recommended.

Better off cleaning each rad and/or fitting a Spirovent.

 

[Agile]

If you mean Powerflush, it is ineffective for ubore and not recommended.

Thats not always the case!

If the rads have pipe connections at opposite ends then power flushing works well on 10 mm.

Tony

 

[Deleted member 105431]

If you mean Powerflush, it is ineffective for ubore and not recommended.

Thats not always the case!

If the rads have pipe connections at opposite ends then power flushing works well on 10 mm.

Tony

I have to agree with simond, powerflushing microbore is pointless, if there is circulation x400 left in a few weeks and x800 left in for 8 hours is my preferred method and fitting a dirt sep maybe even a high head pump (15/60) if needed.

 

[Agile]

I have to agree with simond, powerflushing microbore is pointless, if there is circulation x400 left in a few weeks and x800 left in for 8 hours is my preferred method and fitting a dirt sep maybe even a high head pump (15/60) if needed.

Thats a different argument!

Its chemical treatment against power flushing!

I also agree with you that its not always necessary to power flush and similar results can usually be obtained using the system pump.

That often takes longer though!

Tony