Certain embodiments include a screen assembly of a vessel, where the screen assembly includes a plurality of fixed elements and a retainer, and the retainer includes a ring, a plurality of wedges disposed about the ring, and a plurality of keyholes at spaced locations about the ring. Each keyhole includes a bore and a slot extending from the bore into an adjacent wedge of the plurality of wedges, the slots have a width less than the bores, and the retainer may receive the fixed elements through the bores and may be rotated in a relation with the plurality of fixed elements to bring the plurality of fixed elements into simultaneous engagement with the wedges.

A water filtration system with replaceable active components. The water filtration system includes an outer housing, an inner filter canister, and a housing cap. The outer housing includes an inlet opening and an outlet opening. The housing cap includes a cap inlet opening. The inner filter canister filters water entering through the cap inlet opening. The outer housing retains and holds replaceable active filter components. The outer housing retains and holds the inner filter canister within the outer housing. The inner filter canister includes a connector for coupling to a connector on the underside of the housing cap. The housing cap engages with the inlet opening to secure the inner filter canister and the active filter components within the outer housing. Water exiting from the inner filter canister will be further filtered by the active filter components before exiting the outer housing via the outlet opening.

A water filtration system with replaceable active components. The water filtration system includes an outer housing, an inner filter canister, and a housing cap. The outer housing includes an inlet opening and an outlet opening. The housing cap includes a cap inlet opening. The inner filter canister filters water entering through the cap inlet opening. The outer housing retains and holds replaceable active filter components. The outer housing retains and holds the inner filter canister within the outer housing. The inner filter canister includes a connector for coupling to a connector on the underside of the housing cap. The housing cap engages with the inlet opening to secure the inner filter canister and the active filter components within the outer housing. Water exiting from the inner filter canister will be further filtered by the active filter components before exiting the outer housing via the outlet opening.

A filtration system using lightweight fibrous media (LFM) filter balls that are pre-compressed into an intermediary vessel or element before placing into an outer pressure-holding housing and where the LFM filter balls can be removed periodically to allow separation and relaxation of the media for cleaning. A plurality of lightweight fibrous media balls is pre-compressed at a predetermined ratio of compression and packing density inside their intermediary vessel or element before installation into an outer housing capable of holding pressures of a water flow, thereby forming a single filter mass providing multitudes of tortuous paths through which water can flow and the filter media can capture small particulate matter to reduce turbidity and other water-borne particulate contaminants.

A filtration system using lightweight fibrous media (LFM) filter balls that are pre-compressed into an intermediary vessel or element before placing into an outer pressure-holding housing and where the LFM filter balls can be removed periodically to allow separation and relaxation of the media for cleaning. A plurality of lightweight fibrous media balls is pre-compressed at a predetermined ratio of compression and packing density inside their intermediary vessel or element before installation into an outer housing capable of holding pressures of a water flow, thereby forming a single filter mass providing multitudes of tortuous paths through which water can flow and the filter media can capture small particulate matter to reduce turbidity and other water-borne particulate contaminants.