RP-500 ½- 1. Modification Overview Production of the RP500 began in 2007 and is current. Production of the RP500 began in 2007 and is current.
RP4A 2½ – 6. Modification Overview Production of the RP4A series began in 2008. Production of the RP4A series began in 2008. A Lead free version (4ALF)
RP4AN 21/2 – 6. Modification Overview Production of the RP4AN series began in 2008. Production of the RP4AN series began in 2008. The 4AN indicates an.
375, 375XL ¾”-1”
375, 375XL ¾”-1”. Modification Overview Production of the ¾”-1” 375 began in 2004 and is current. The lead free version 375XL was introduced in 2010.
