|     | 
      
        |   |  
        | H2O # | Manf. # | Description |  
        | 3819301 | 3-270 | 
        
        ORP Old Style 
        Sensor, Install Method: Compression  |  
        | 3819306 | 3-280 | 
        pH
        Old Style Sensor, Install Method: 
        Compression |  
        | 3819304 | 3-271 | 
        
        ORP New Style 
        Sensor, Install Method: Threaded, 1/2" |  
        | 3819310 | 3-281 | 
        pH
        New Style Sensor, Install Method: 
        Threaded, 1/2" |  
        | 9714055 | 2-620 | 
        Sensor Compression Fitting, 1/2" Mip  X  1/2" Compression,Used with Old Style Sensors, threads into Flow Cell
 |  
        | 3819297 | 8-112 | 
        Screen, Strainer Assembly |  
        | 3819299 | 9-701 | Flow 
        Switch replacement |        |