Is oil trap really necessary

Is oil trap really necessary?:D
http://www.fanzo.org/forum/download/...9262&mode=view

not really, i prefer a double riser!

Oil trap or double riser.

Depends on the system. I had systems where the liquid is so "dry", we need to inject oil in the liquid line to let solenoids and electronic expansion valves operating freely. On screw systems

3/8" oil line on solenoid valve, 3 seconds on, 20 minutes off.

Common guys! Chill out.:eek:

No sense for humor, or simple nerds?

Not if you drain all the oil out first.

Jon :p