CANISTER FILTER SYSTEM WITH DRAIN THAT COOPERATES WITH FILTER ELEMENT

摘要

A canister filter system (1) includes a base (10), a canister (20) attachable to the base (10), and positioned inside the canister (20) a filter element (30)having filter media (31). A drain (40) engages and forms a seal with the filter element (30) in a closed position. In an open position, the drain (40) allows fluid to be removed from the canister (20). Because the drain (40) is engaged to and forms a seal with the filter element (30) in the closed position, the drain (40) cannot be closed unless a filter element (30) is present inside the canister (20). This prevents accidental or intentional use of the filter system (1) without a filter element (30) in place.