So i just replaced my submersible pump along with all the piping, bladder tank and all hardware. I'm having an issue when the pressure switch (30/50) kicks on the pressure gauge drops suddenly to about 15 but instantly builds pressure, it also causes the pipe just past the T to buck like water hammer. Could having a check valve installed at the T be causing this? I only put a check valve in because it was there prior and don't see a need for it as the pump has a foot valve.
