Injection Check/Back Pressure Valve Assembly. For Pulsatron pumps with wet end codes: VVC3, VVCA, VVCF, WVC3, WVCA. For Chem-Tech pumps with wet end codes: ABAA, ACAA, BBAA, BBAF. 1/2" OD tubing connection fitting with coupling nut 1/2" NPT male connection for the injection point. |