The Walchem EWB15Y1-VC pump is obsolete and was replaced by the EWB16Y1-VC pump which has a new head and diaphragm design. Both the EWB15Y1-VC and the EWB16Y1-VC have the same specifications of 1.0 GPH, 105 PSI, dig/ana input, PVC/CE/FKM, 3/8" OD, 115 VAC. Many of the liquid end parts are also interchangeable between the two generations.
