192.623—Maximum and minimum allowable operating pressure; Low-pressure distribution systems.
               		
               	 	
               	 	
               	 	               	 	               	 	               	 	               	 	
               	 	
    
        
        (a) 
         No person may operate a low-pressure distribution system at a pressure high enough to make unsafe the operation of any connected and properly  adjusted low-pressure gas burning equipment.
     
    
        
        (b) 
         No person may operate a low pressure distribution system at a pressure lower than the minimum pressure at which the safe and continuing operation of any connected and properly adjusted low-pressure gas burning equipment can be assured.