Microbore pipework (diameter ≤ 12mm) has been identified as partially or fully blocked within the [heating / hot & cold water] distribution system. The blockages are restricting flow, leading to [poor heating performance / slow hot water delivery / non-functional radiators]. Due to the narrow internal bore, these pipes are highly susceptible to obstruction from sludge, magnetite (black iron oxide), debris, or air locks.
: Install a filter (e.g., Adey MagnaClean) on the return pipe to catch sludge before it enters the small tubes. blocked microbore pipes
: If you are installing a new boiler, many checkatrade experts recommend replacing microbore with standard 15mm pipes to ensure the new boiler’s warranty isn't voided by sludge. Microbore pipework (diameter ≤ 12mm) has been identified
Because microbore copper is malleable, it is easily kinked during installation or DIY work, creating a permanent restriction where debris can collect. Key Symptoms to Watch For : Install a filter (e
: Plumbers use a thin, flexible wire or "drain snake" pushed through the disconnected pipe. Pros : Can physically break up stubborn scale.
Do you know if your system has a (usually in an airing cupboard)? Have you tried bleeding the radiator yet? Unblocking Microbore Pipes - PowDer Flush
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