A pressure check was done after modifying 4 sensors. There was improvement but the leak still existed. Decided to go back to square one by checking the Vaisala line. It was ok. Leakage started as soon as we added the first "T" junction. Further tests showed that the leak could be stopped by adding panduit ties at each junction (3 ties per T). This requires very small ties so an order to Digikey was placed. Should have the ties by tomorrow noon.