Freeze resistant water filter

Abstract

A freeze resistant filter cartridge assembly, includes a filter cartridge including a filter housing and a filter media and having at least one component selected from a list of components consisting of: the filter housing being formed of an increased elasticity polyolefin polymer having elongation and glass transition properties that allow for stretching of the housing during a freezing event rather than rupturing; a sleeve having a volume of air entrapped therein within and being disposed in the interior of the filter cartridge; and the filter housing formed of a conventional polyolefin having a wall thickness great enough to resist freeze induced expansion stresses. A method of forming a freeze resistant filter cartridge assembly is further included.

1 . A method of forming a freeze resistant filter cartridge assembly, comprising:
 forming a filter cartridge including a filter housing and disposing a filter media in the filter housing and forming at least one filter cartridge component selected from a list of steps consisting of;   forming the filter housing of an increased elasticity polyolefin polymer having elongation and glass transition properties that allow for stretching of the housing during a freezing event rather than rupturing; and   forming a sleeve having volume of air is entrapped therein within and disposing the sleeve in the interior of the filter housing.