| ISB part # | Description | 
  | 56-3010-110 | 1/2" GPA Valve  313MEPA50  (1/2" operating port, 3/8" supply port,  1" exhaust port, 110VAC) | 
  | 56-3010-220 | 3/4" GPA Valve   314MEPA52 ( 3/4" operating port, 1/2" supply port, 1" exhaust port, 110VAC) | 
  | 56-3010-330 | 1" GPA Valve     316MEPA50 (1" operating port, 1/2" supply port, 1.5" exhaust port, 110VAC) | 
  | 56-3010-40 | 1/2" GPA Valve  313MEPA50  (1/2" operating port, 3/8" supply port,  1" exhaust port, 24VDC) | 
  | 56-3010-50 | 3/4" GPA Valve   314MEPA52 ( 3/4" operating port, 1/2" supply port, 1" exhaust port, 24VDC) | 
  | 56-3010-60 | 1" GPA Valve     316MEPA50 (1" operating port, 1/2" supply port, 1.5" exhaust port, 24VDC) | 
  | 56-3015-001 | Pressure Fault Monitor switch for all above valves.  (2 required per valve)    Price provided is per unit | 
  | 56-3020-02 | GPA Air valve for 1" exhaust muffler (for 1/2" and 3/4" GPA  valves) | 
  | 56-3020-03 | GPA Air valve for 1.5" exhaust muffler (for 1" GPA  valves) | 
  | 56-3010-24-DC-1 | GPA Valve 1/2" 24 V DC solenoid kit  (2 per valve) | 
  | 56-3010-24-DC-2 | GPA Valve 3/4" 24 V DC solenoid kit  ( 2 per valve) | 
  | 56-3010-24-DC-3 | GPA Valve  1"  24 V DC solenoid kit   ( 2 per valve) | 
  | 90-2050-01 | GPA Valve wiring box |