(a) 
         Thermosetting fittings for plastic pipe must conform to ASTM D 2517, (incorporated by reference, see § 192.7 ).
     
    
        
        (b) 
         Thermoplastic fittings for plastic pipe must conform to ASTM D 2513-99, (incorporated by reference, see § 192.7 ).
     
    [Amdt. 192-114, 75 FR 48603, Aug. 11, 2010]