Am having problems with pressure test of new pipe. The pipe is 1250’ with most in a vertical bore (abandoned well). The only fitting not in the basement is the factory fused ‘U’. Am supposed to hydrostatic test at 100 psi … for the moment only have 60 psi (but this will be resolvable) When pressurizing the pipe, the pressure gradually drops. But each time to a higher level. For example, 60 psi dropped to 15 psi in 12 hours. Then 60 psi dropped to 35 psi in 12 hours. Now it drops to 45 psi. Is the pipe stretching or is there a small leak? Granted, the pipe ends up a little oval from being rolled at the factory and this 160 psi HDPE pipe is tough. How do I determine if it is a leak? It would seem that any leak would not improve over time … more likely the opposite - faster/further pressure drop. Lastly, how should such a leak be resolved? The well is not grouted at this time so it is possible to pull the pipe up … but even then, how would such a tiny leak be located?