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After a non-heating season, the heating pipes of wall-hung boilers are left unused which is likely to produce impurities after rust and microbial precipitation. Water pump is a precision component inside the wall-hung boiler. These impurities can easily hinder the operation of the water pump, causing it to jam, increase noise, or even damage it.

The ideal solution is to release and clean the water in the heating pipes first when starting to use heating in winter. Then install a fine-mesh filter at the backwater of the wall-hung boiler and clean up the dirt in time.