The Walchem EWC20Y1-VCA pump is obsolete and was replaced by the EWC21Y1-VCA pump which has a new head and diaphragm design. Both the EWC20Y1-VCA and the EWC21Y1-VCA have the same specifications of 2.3 GPH, 65 PSI, dig/ana input, PVC/CE/TI/FKM, w/AAVV, 3/8" OD, 115 VAC. Many of the liquid end parts are also interchangeable between the two generations.
