Magnetic filtration apparatus to separate contaminant material from a fluid, said apparatus comprising: a housing to provide containment of a fluid flowing through the apparatus, the housing having a fluid inlet and a fluid outlet; a first elongate chamber within the housing, the first chamber in fluid communication with the inlet substantially towards a first end to allow fluid to enter the first chamber; a first elongate magnetic core extending axially within the first elongate chamber such that a magnetic field generated by the first magnetic core is created in the fluid flow path to entrap contaminant material as it flows passed the first magnetic core; a second elongate chamber within the housing, the second chamber in fluid communication with the outlet substantially towards a first end to allow the fluid to exit the second chamber; a second elongate magnetic core extending axially within the second elongate chamber such that a magnetic field generated by the second magnetic core is created in the fluid flow path to entrap contaminant material as it flows passed the second magnetic core; the first magnetic core and the second magnetic core housed respectively within an elongate tube (300, 301) to entrap contaminant material around each respective elongate tube (300, 301); characterised by: a passageway connecting the first and second elongate chambers in internal fluid communication towards their respective second ends such that the fluid is directed to flow from the inlet passed substantially the full length of the first magnetic core in a first direction, through the passageway, passed substantially the full length of the second magnetic core in a second direction opposed to the first direction to the outlet; wherein the volume of the first chamber is less than the volume of the second chamber such that a fluid flow speed in the first chamber is greater than a fluid flow speed in the second chamber. a housing to provide containment of a fluid flowing through the apparatus, the housing having a fluid inlet and a fluid outlet; a first elongate chamber within the housing, the first chamber in fluid communication with the inlet substantially towards a first end to allow fluid to enter the first chamber; a first elongate magnetic core extending axially within the first elongate chamber such that a magnetic field generated by the first magnetic core is created in the fluid flow path to entrap contaminant material as it flows passed the first magnetic core; a second elongate chamber within the housing, the second chamber in fluid communication with the outlet substantially towards a first end to allow the fluid to exit the second chamber; a second elongate magnetic core extending axially within the second elongate chamber such that a magnetic field generated by the second magnetic core is created in the fluid flow path to entrap contaminant material as it flows passed the second magnetic core; the first magnetic core and the second magnetic core housed respectively within an elongate tube (300, 301) to entrap contaminant material around each respective elongate tube (300, 301); a passageway connecting the first and second elongate chambers in internal fluid communication towards their respective second ends such that the fluid is directed to flow from the inlet passed substantially the full length of the first magnetic core in a first direction, through the passageway, passed substantially the full length of the second magnetic core in a second direction opposed to the first direction to the outlet; wherein the volume of the first chamber is less than the volume of the second chamber such that a fluid flow speed in the first chamber is greater than a fluid flow speed in the second chamber.