ok, for whatever reason I guess everyone is hung up thinking the pressure leak as at the elbow and I guess I didnt explain it correctly lol. Its not. its at the well head rubber seal up against the black drop pipe itself. not the elbow.
...even with the 1/2" blue plug taken out, it still hissed
Let me explain the reason for our thinking. With the baby blue plug out, the casing air pressure is the same as the atmospheric pressure.
Ahhh... I see why you could air hissing where you point: you put the baby blue plug back in.
Do you get hissing with the plug out? With the pipe elevated, as in your most recent photo, you could better isolate the point of the hiss.
Since you can lift your black pipe by hand pretty easily, changing that foot valve, if needed, would probably not be so hard. Too bad the union is not closer to the wellhead if you decide to do that, however. You would
loosen the 4 well seal nuts, and lift the well seal and all.
Also, when you connect the poly pipe to a barb for wells, it is normal to use two worm gear clamps with the worms on opposite sides. That presumes the barb is long enough.
anyway, I pulled up on the pipe and cleaned it off and wrapped it a couple times with electrical tape and then pushed it back down and then tapped on the top of the elbow to push the pipe down further into the well head seal. then turned the pump back on and now it holds pressure much better.
instead of hissing at me and bleeding pressure down to where the pump ticks on real quick once every minute or two it bleeds down over the course of about 30 minutes.
If this tape was not at the clamp, that would imply there was a hole in the pipe that the tape covered mostly. You would have been leaking water rather than air. That is why Bannerman suggested cutting your pipe shorter to cut out the leaky place. And your foot valve would be blameless.