Following up,
- we haven’t done much long term submersion testing, so don’t have statistically significant data on it, and can only provide limited guidance at this stage
- the testing we have done indicates that the main/fastest degradation generally comes from repeated cycling to high pressures
- some failure modes are outside our control and testing, and would need to be verified per use-case
- environment causing corrosion
- cable jacket material susceptible to creep
- incorrect selection for seal size or plug compression
- assuming those effects are not major, we expect (but cannot guarantee) the seal and penetrator to withstand the rated pressure for at least a year, and potentially indefinitely at much lower pressures