Its the usual type, with the two stems with springs. I need to set the cut on/off pressure higher but it has been so long since I've messed with one I do not remember the set up, there is no decal under the cover. Am I correct that the bigger adjustment controls the cut in pressure and the small one changes the pressure range? Presently the gauge states its cutting in at 25 and out at 30. It takes me about 40 seconds to draw a glass of water; there is no air valve on the tank - so it will have to be recharged via draining if necessary.