Abstract: Embodiments herein relate to end caps and pleat guides for filter assemblies. In an embodiment, a filter assembly component is included having an end cap that can include a pleat guide channel disposed about a circumference of the end cap. The pleat guide channel can include a repeating pattern that can include a plurality of peaks and a plurality of valleys distributed about the circumference of the end cap. The pleat guide channel can be configured to receive and mechanically support a pleated filter media within the pleat guide channel. Other embodiments are also included herein.

Abstract: A deaerator includes gas nucleation media and a porous barrier. The deaerator may include growth media between the gas nucleation media and the porous barrier. The deaerator may be part of a system for removing gas from a fluid, where the system includes a tank with a fluid inlet and a fluid outlet and having a fluid flow path from the fluid inlet to the fluid outlet, and where the deaerator is in the fluid flow path. A method for removing gas from a fluid includes passing the fluid through the deaerator defining a fluid flow path.

Abstract: A filter cartridge with flow travelling from inside to outside with a flow path in a bottom end cap to enter the cartridge has an anti-drain back valve to prevent cross-contamination to the clean side of the system during filter change-out. The anti-drain back valve moves away from the bottom end cap to allow inlet flow into the cartridge during filtering operation, and when flow ceases, the valve settles to the bottom of the cartridge to plug the flow path during service.