A filter arrangement for an aquarium is disclosed. The filter arrangement can include a housing assembly, a pump assembly, a transfer tube assembly, and a valve assembly for controlling water flow through the transfer tube assembly. The transfer tube assembly can include a tube structure within which a valve body of the valve assembly is rotatably disposed. The tube structure can be formed from a first tube half mated to a second tube half to permanently secure the valve body within the tube structure. A valve operator can be connected to the valve body to advantageously allow a user to manipulate the flow of water through the transfer tube assembly. Control of water flow through the filter arrangement is beneficial for obtaining a desired water flow for a certain aquarium size and application and for reducing flow during certain periods, such as during feeding.

In exemplary embodiments, a bi-directional valve for a bi-flow filter drier includes a valve body and a movable valve member disposed within the valve body. The movable valve member is movable within the valve body between a first position and a second position. In the first position, the movable valve member permits fluid flow in a first or forward flow direction through the valve while blocking or inhibiting fluid flow in a second or reverse flow direction through the valve. In the second position, the movable flow member permits fluid flow in the second or reverse flow direction through the valve while blocking or inhibiting fluid flow in the first or forward flow direction through the valve. The direction of fluid flow through the other filter drier components may be essentially the same whether the movable valve member is in the first position or the second position.

In exemplary embodiments, a bi-directional valve for a bi-flow filter drier includes a valve body and a movable valve member disposed within the valve body. The movable valve member is movable within the valve body between a first position and a second position. In the first position, the movable valve member permits fluid flow in a first or forward flow direction through the valve while blocking or inhibiting fluid flow in a second or reverse flow direction through the valve. In the second position, the movable flow member permits fluid flow in the second or reverse flow direction through the valve while blocking or inhibiting fluid flow in the first or forward flow direction through the valve. The direction of fluid flow through the other filter drier components may be essentially the same whether the movable valve member is in the first position or the second position.

In exemplary embodiments, a bi-directional valve for a bi-flow filter drier includes a valve body and a movable valve member disposed within the valve body. The movable valve member is movable within the valve body between a first position and a second position. In the first position, the movable valve member permits fluid flow in a first or forward flow direction through the valve while blocking or inhibiting fluid flow in a second or reverse flow direction through the valve. In the second position, the movable flow member permits fluid flow in the second or reverse flow direction through the valve while blocking or inhibiting fluid flow in the first or forward flow direction through the valve. The direction of fluid flow through the other filter drier components may be essentially the same whether the movable valve member is in the first position or the second position.

In exemplary embodiments, a bi-directional valve for a bi-flow filter drier includes a valve body and a movable valve member disposed within the valve body. The movable valve member is movable within the valve body between a first position and a second position. In the first position, the movable valve member permits fluid flow in a first or forward flow direction through the valve while blocking or inhibiting fluid flow in a second or reverse flow direction through the valve. In the second position, the movable flow member permits fluid flow in the second or reverse flow direction through the valve while blocking or inhibiting fluid flow in the first or forward flow direction through the valve. The direction of fluid flow through the other filter drier components may be essentially the same whether the movable valve member is in the first position or the second position.