USABlueBook lists three different grades. The construction of each grade is different and this is reflected in the published pressure ratings. Pressure ratings of one brand of hose versus another can vary greatly, and the color of the hose is not always an accurate indicator of the quality of the hose. Select hose based on your actual needs. Standard PVC discharge hose is fine for pumping water out of a ditch at low pressure. Heavy-duty PVC discharge hose has almost twice the psi rating of standard hose. High pressure PVC discharge hose has pressure ratings comparable to fire hose in many sizes, but unlike fire hose it has a smooth cover to reduce scuffing when it is dragged over rough surfaces.
