Overview Product Description 195523 Old-Stock, Dwyer 1638-0 Diaphragm Pressure Switch, 10PSI Max, 25PSI Surge Pressure, 15A 125, 250, 480 VAC, 1/8HP:125VAC, 1/4HP:250VAC, 14AWG. Item appears Unused and has been in storage for some time.. Austin Surplus SKU: 195523 Location: GRG-R10-P16-S03-0013087 Product Videos Custom Field Product Reviews