A blood processing apparatus comprising: a separation chamber; a tubing set coupled to said separation chamber for conducting blood, blood components, and fluids to and from said separation chamber, said tubing set including at least one inlet line in fluid communication with said separation chamber and at least one outlet line in fluid communication with said separation chamber; a storage solution line in fluid communication with said at least one outlet line at a junction; at least a first peristaltic pump, a first segment of said at least one outlet line configured to engage said first peristaltic pump, wherein said first segment of said outlet line is adjacent said junction; at least a second peristaltic pump; means for controlling said first pump to conduct a predetermined quantity of storage solution; a reservoir for receiving selected fluids; means for purging blood components in at least part of said tubing set into said reservoir prior to conducting said predetermined quantity of storage solution, said means for purging blood components comprising an apparatus for applying a positive pressure to fluid in at least a portion of said tubing set and for applying a negative pressure to said fluid in said at least a portion of said tubing set; a second segment of said outlet line being configured to engage said second peristaltic pump, said second segment being adjacent a connection adapted for communication with a blood component collection bag; and wherein said apparatus for applying pressure comprises: a controller in communication with said first and second peristaltic pumps, said controller being configured to activate at least said first peristaltic pump to create said positive pressure and to activate at least said second peristaltic pump to create said negative pressure. a separation chamber; a tubing set coupled to said separation chamber for conducting blood, blood components, and fluids to and from said separation chamber, said tubing set including at least one inlet line in fluid communication with said separation chamber and at least one outlet line in fluid communication with said separation chamber; a storage solution line in fluid communication with said at least one outlet line at a junction; at least a first peristaltic pump, a first segment of said at least one outlet line configured to engage said first peristaltic pump, wherein said first segment of said outlet line is adjacent said junction; at least a second peristaltic pump; means for controlling said first pump to conduct a predetermined quantity of storage solution; a reservoir for receiving selected fluids; means for purging blood components in at least part of said tubing set into said reservoir prior to conducting said predetermined quantity of storage solution, said means for purging blood components comprising an apparatus for applying a positive pressure to fluid in at least a portion of said tubing set and for applying a negative pressure to said fluid in said at least a portion of said tubing set; a second segment of said outlet line being configured to engage said second peristaltic pump, said second segment being adjacent a connection adapted for communication with a blood component collection bag; and wherein said apparatus for applying pressure comprises: a controller in communication with said first and second peristaltic pumps, said controller being configured to activate at least said first peristaltic pump to create said positive pressure and to activate at least said second peristaltic pump to create said negative pressure.