Kind of slapped together
Join Date: Jan 2010
Location: Bossier City, LA
Yep, that's low pressure.
It becomes obvious if you follow the hoses ... compressor --> HP fitting going into condensor --> outlet hose to evaporator --> evaporator to accumulator --> to high pressure fitting and compressor.
BTW, the expansion valve is in the hose from the condensor to the evaporator. I've found it's cheaper to just replace the whole line.