The Walchem EWB11Y2-VC pump is now obsolete and has been replaced by the EWN-B11VC2Y pump which has more I/O and, therefore, offers greater flexibility. Both the EWB11Y2-VC and the EWN-B11VC2Y have the same specifications of 0.6 GPH, 150 PSI, DIG/ANA INPUT, PVC/CE/FKM, 3/8" OD, 230 VAC.
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