01/11/2026
Baxi 830 supplied & fitted yesterday with a full system power flush.
Just look at the state of what came out of this system! 👇
This is why we ALWAYS recommend a proper power flush when fitting a new boiler. That black sludge is magnetite - it kills pumps, blocks heat exchangers, and makes your radiators cold at the bottom. The customer was shocked when we showed them the filter