A fuel system comprising: a first fuel line carrying fuel at a first line pressure; a second fuel line carrying fuel at a second line pressure (PFNC) greater than said first line pressure; at least one pressure regulating section comprising an input connected to said second fuel line and at least one output, a first pressure regulator connected to said input and a second pressure regulator connected between first pressure regulator and said at least one output; and a controller controlling the position of said first and second pressure regulators (120,130) to produce at said output one of a predetermined number of output pressures relative to said first line pressure; wherein said first pressure regulator and said second pressure regulator each comprise a valve (122,132) having a control surface (124, 134) and a metering orifice (128, 138); wherein said controller comprises a movable member regulating a fluid control pressure applied against the control surface (122, 132) of each of said first and second valves; and wherein said pressure regulating section further comprises a third pressure regulator connected between said second pressure regulator and said at least one output and a fourth pressure regulator connected between said third pressure regulator and said at least one output, said first pressure regulator regulating at a first valve pressure, said second pressure regulator regulating at a second valve pressure greater than said first valve pressure, said third pressure regulator regulating at a third valve pressure greater than said second valve pressure, and said fourth pressure regulator regulating at a fourth valve pressure greater than said third valve pressure. a first fuel line carrying fuel at a first line pressure; a second fuel line carrying fuel at a second line pressure (PFNC) greater than said first line pressure; at least one pressure regulating section comprising an input connected to said second fuel line and at least one output, a first pressure regulator connected to said input and a second pressure regulator connected between first pressure regulator and said at least one output; and a controller controlling the position of said first and second pressure regulators (120,130) to produce at said output one of a predetermined number of output pressures relative to said first line pressure; wherein said first pressure regulator and said second pressure regulator each comprise a valve (122,132) having a control surface (124, 134) and a metering orifice (128, 138); wherein said controller comprises a movable member regulating a fluid control pressure applied against the control surface (122, 132) of each of said first and second valves; and wherein said pressure regulating section further comprises a third pressure regulator connected between said second pressure regulator and said at least one output and a fourth pressure regulator connected between said third pressure regulator and said at least one output, said first pressure regulator regulating at a first valve pressure, said second pressure regulator regulating at a second valve pressure greater than said first valve pressure, said third pressure regulator regulating at a third valve pressure greater than said second valve pressure, and said fourth pressure regulator regulating at a fourth valve pressure greater than said third valve pressure.