A pump system (100; 200) comprising: a container comprising a blown-in dip tube; a trigger sprayer attached to the container, the trigger sprayer comprising: a valve body (150; 250), which comprises: a piston chamber; a first fluid passageway; a vent including a vent connection; and a piston positioned in the piston chamber; a trigger attached to the valve body and the piston, the trigger capable of moving the piston within the piston chamber; a spring for biasing either the trigger or piston to allow return movement of the piston following an actuation of the pump system; and a valve in the fluid passageway; characterized in that the valve body (150; 250) includes at least one connector for retaining a blown-in dip tube connector (160; 260), and in that the pump system includes said blown-in dip tube connector (160; 260) mated to the blow-in dip tube and connected to the valve body, the blown-in dip tube connector (160; 260) comprising: a fluid inlet (161; 241); a connector head (164; 264); at least one connector lip (165; 265) about a periphery of the connector head (164; 264) configured to snap-fit or otherwise mate the connector on the valve body (150; 250) such that the blown-in dip tube connector (160; 260) is fitted with or retained with the valve body (150; 250); a fluid flow path between the fluid inlet (161; 241) and the connector head (164; 264); and a vent passage connected to the vent connection, the vent connection configured to connect an interior portion of the piston chamber with an interior portion of the valve body which is in communication with the interior of the container such that when piston passes a certain location within the piston chamber, air may pass through the vent connection and into the container. a container comprising a blown-in dip tube; a trigger sprayer attached to the container, the trigger sprayer comprising: a valve body (150; 250), which comprises: a piston chamber; a first fluid passageway; a vent including a vent connection; and a piston positioned in the piston chamber; a trigger attached to the valve body and the piston, the trigger capable of moving the piston within the piston chamber; a spring for biasing either the trigger or piston to allow return movement of the piston following an actuation of the pump system; and a valve in the fluid passageway; a valve body (150; 250), which comprises: a piston chamber; a first fluid passageway; a vent including a vent connection; and a piston positioned in the piston chamber; a piston chamber; a first fluid passageway; a vent including a vent connection; and a piston positioned in the piston chamber; a trigger attached to the valve body and the piston, the trigger capable of moving the piston within the piston chamber; a spring for biasing either the trigger or piston to allow return movement of the piston following an actuation of the pump system; and a valve in the fluid passageway; characterized in that the valve body (150; 250) includes at least one connector for retaining a blown-in dip tube connector (160; 260), and in that the pump system includes said blown-in dip tube connector (160; 260) mated to the blow-in dip tube and connected to the valve body, the blown-in dip tube connector (160; 260) comprising: a fluid inlet (161; 241); a connector head (164; 264); at least one connector lip (165; 265) about a periphery of the connector head (164; 264) configured to snap-fit or otherwise mate the connector on the valve body (150; 250) such that the blown-in dip tube connector (160; 260) is fitted with or retained with the valve body (150; 250); a fluid flow path between the fluid inlet (161; 241) and the connector head (164; 264); and a vent passage connected to the vent connection, the vent connection configured to connect an interior portion of the piston chamber with an interior portion of the valve body which is in communication with the interior of the container such that when piston passes a certain location within the piston chamber, air may pass through the vent connection and into the container. a fluid inlet (161; 241); a connector head (164; 264); at least one connector lip (165; 265) about a periphery of the connector head (164; 264) configured to snap-fit or otherwise mate the connector on the valve body (150; 250) such that the blown-in dip tube connector (160; 260) is fitted with or retained with the valve body (150; 250); a fluid flow path between the fluid inlet (161; 241) and the connector head (164; 264); and a vent passage connected to the vent connection, the vent connection configured to connect an interior portion of the piston chamber with an interior portion of the valve body which is in communication with the interior of the container such that when piston passes a certain location within the piston chamber, air may pass through the vent connection and into the container.