does internal water piping need to be replaced for new heating system?

ormus

re capacity:
15mm pipe will provide 2.5 times the heat flow rate of 10mm pipe.

gasbag1602

Dont waste your money, get the pipework flushed and you will be ok!

Jonesya

ormus wrote: »

15mm gives you lots more flow. and its less likely to furr up with scale.
at least itll take many more years to do so.

How would they furr up though? Isn't the central heating a sealed system, once it's filled there should be very little water, and calcium/furr, added to the system over the years?

Fair enough you might get rust sludge from the radiators but couldn't you flush that out, it doesn't stick to the copper like furr does it?

Cozworth806

If you live in a soft water area as well then there is again less point to change it, however I wish my new house had been built with 15mm pipe..