MagnaCleanÃÂ® Professional2xp has been developed by the company that pioneered magnetic filtration. ADEY's filters protect more than a million central heating systems in UK homes removing virtually 100% of the damaging suspended black oxide sludge that builds up in all heating systems. The dual-action filter can be installed anywhere on the main circuit. However, to achieve the best level of protection for the boiler or air source heat pump, it is recommended that MagnaClean Professional2 is fitted after the last radiator and before the boiler or air source heat pump. In determining a suitable location, it is important to allow adequate access for servicing.