Abstract: A housing for use with a removable filter element includes fluid inlet passages and a fluid outlet passage, a plurality of arcuate slots arranged in a generally circular pattern on the housing, the housing including a valve body with bolts passing through the slots securing the valve body to the housing. A threaded boss is formed on the valve body for attachment of a filter element. A number of ports are formed on the valve body in registery with the fluid inlet passages for supplying fluid to the filter element. The boss includes a passageway therethrough communicating with the outlet passage and a check valve in the passageway. A seal is positioned between the housing and the valve body. Turning the filter element in a direction to remove it causes an initial rotation of the bolts in the slots resulting in misalignment of the ports and the fluid inlet passages, blocking flow to the ports.