Unitary filter tank and an underdrain for filtering a body of water

摘要

Exemplary embodiments include a unitary pool filter tank and/or an underdrain for a pool filter unit. Embodiments of the unitary pool filter tank can have an integrally formed housing and base. The filter tank can be formed using a blow molding process in which the base of the filter tank is reinforced using multiple polymer layers that have been folded and/or pinched together. Embodiments of the underdrain can be formed by interlocking top and bottom components. The top and bottom components can be interlocked by inter-component locking structures.

主权项

1. An underdrain for a pool filter comprising:
a first component; and a second component selectively interlocking with the first component to form an interior area of the underdrain, each of the first and second components having a plurality of drainage openings, each of the drainage openings opening into the interior area of the underdrain and permitting fluid communication between an exterior of the underdrain and the interior area, wherein the first component includes a first bracing member extending from an inner surface of the first component into an interior area of the underdrain so that a tip of the first bracing member extends into the second component, and the second component includes a second bracing member extending from an inner surface of the second component into the interior area of the underdrain, the tip of the first bracing member having a recess for receiving a tip of the second bracing member so that the second bracing member engages the first bracing member to form a support column extending between the inner surface of the first component and the inner surface of the second component.