For 50mm bend radius, when n=1, given the time needed to accumlate 5 Liters of water is 13.97 seconds, the pipe diameter is 13.7mm Calculate hB using Equations (7) and (8) and Table 2 on page F5-3 hB=KB2gV2 KB=(n1)(0.25fTdr+0.5K)+K Table 2: 90 Pipe Bends and Flanged or Butt-Welding 90 Elbows