The 4900 Series magnetic dirt separator provides dual-action dirt separation for closed loop hydronic heating systems. Both hydronic component lifecycle and efficiency are improved with the use of an effective dirt separation system. The product uses a 13,000 gauss magnet in addition to patented PALL ring technology. The 4900 Series magnetic dirt separator separates microscopic particles including dirt and magnetite from hydronic fluid with minimal pressure loss. The unit is easily blown down (cleaned) by opening a valve at the bottom of the vessel.