Integral two-stage units that combine a first-stage regulator and second-stage regulator into one compact unit. Recommended for installations where piping distance is short. These regulators provide all the advantages of two-stage regulation. These units have improved regulation. The second-stage portion receives a relatively uniform inlet pressure from the first-stage portion. This elimination of wide fluctuations in inlet pressure helps the regulator maintain appliance pressure at a nearly constant 11-inches water column.