I would not use the compressor to pump down that low.
1) If theirs a leak you've contaminated the entire system
2) The compressor in that system may not pull down that low.
Follow the manufactures p… (View Post)
Its not the P-Trap. Traps are required when the coil is on the negative pressure side, yours is positive pressure. All the trap will do is close a 3/4" hole from spilling air.
Assuming the static pr… (View Post)