| Please note that due to the high watertightness offered by protection rating IP 66, condensation may form inside the device. |
| Exceptionally good concreting is essential in tank work if watertightness is to be secured. |
| The standard tests for cells, including those for watertightness, are set by a body called the International Electrotechnical Commission. |
| Openings and passageways shall not adversely affect the watertightness of bulkheads. |
| The wall-window assemblies were subjected to watertightness performance tests that mimic significant wind-driven rain loads. |
| Again the work has to be done uniformly well, not only for appearance sake but because of the necessity of watertightness. |
