Hypro 6 Roller Pump NI-RESIST (6500N) Hypro 6 Roller Pump NI-RESIST (6500N) Max. 21.8 GPM, Max. 300 PSI, Max. 1200 RPM, Max. 140 F Ports: 3/4" NPT inlet and outlet Shaft: 5/8" solid Ni-resist housing and rotor ; CCW rotation ; Viton seals, Super Rollers