C900 is an AWWA standard, and is separate from UL listings and FM approvals. UL and FM have each issued separate standards for Underground Fire Service PVC distribution pipe. UL standard 1285 lists AWWA C900 pipe in sizes 4 to 12 inches with working pressures of 165, 235, and 305 psi for fire protection service. FM class number 1612 approves AWWA C900 PVC pipe rated class 150 (DR18) and class 200 (DR14) for fire protection service.
