Comparison : Item # PTW-3300, Rigid Pigtail Assembly w/ Single & Double Loop (Brass Wrench, One End)
Item # PTW-3300CV, Rigid Pigtail Assembly w/ Single & Double Loop (Brass Wrench, One End), w/ Check Valve to Inlet
Item # PTW-3300RCV, Rigid Pigtail Assembly w/ Single & Double Loop (Brass Wrench, One End), w/ Reverse Check Valve on Outlet
Item # PT-320, Rigid Pigtail Assembly w/ Single & Double Loop (Copper Pig 2, Loops, Brass Ends)
Item # PT-320CV, Rigid Pigtail Assembly w/ Single & Double Loop (Copper Pig 2, Loops, Brass Ends), w/ Check Valve to Inlet