The Walchem EWB30F1-VC pump is obsolete and was replaced by the EWB31F1-VC pump which has a new head and diaphragm design. Both the EWB30F1-VC and the EWB31F1-VC have the same specifications of 3.3 GPH, 30 PSI, digital input, PVC/CE/FKM, 1/2" OD, 115 VAC. Many of the liquid end parts are also interchangeable between the two generations.
