The new boiler should not be connect to any system unless its relatively clean.
However, any flushing is more effective at higher temperatures when using chemicals.
I would flush a new system with mains water first and when reasonably clean would connect the boiler and flush warm with chemicals.
We give a full guarantee on any work we do!
Take care with any suggestions from people who hide their identities.
Tony
However, any flushing is more effective at higher temperatures when using chemicals.
I would flush a new system with mains water first and when reasonably clean would connect the boiler and flush warm with chemicals.
We give a full guarantee on any work we do!
Take care with any suggestions from people who hide their identities.
Tony