The cheap single stage pumps really struggle to get down there. The quick/easy thing to try is better vacuum pump oil like black gold. I’ve taken one of my single stage pumps apart and surfaced all the critical sealing edges, cleaned well and reassembled. It made the biggest difference when getting down in the low micron range.
@@suki4410 it wasn't the wrong oil, I show in the video it is filled to the proper level, and I show how it holds the vacuum in the chamber of I close the valve. Best explanation I have gotten is this is at 7500 feet altitude
@@TheSorters In my opinion, the altitude has no effect on the vacuum, or the pump. It should be able to reach at least 25 inches of mercury. Your connection is not airtight.
Most likely that is what it was ..the sell everything so u can spend money ..every hvac vaccum comes with plastic caps.they should send em out with brass caps
@@TheSorters At 7500 ft, the air pressure is about 0.7-0.8 Atm, which means that you are probably reaching the full vacuum of the pump, you'd need an absolute vacuum gauge to measure the actual pressure inside of the chamber
The cheap single stage pumps really struggle to get down there. The quick/easy thing to try is better vacuum pump oil like black gold. I’ve taken one of my single stage pumps apart and surfaced all the critical sealing edges, cleaned well and reassembled. It made the biggest difference when getting down in the low micron range.
I will definitely try that. The frustrating thing is this is a brand new pump, advertised to be able to go down to 75 microns, and it doesnt
@@TheSorters Either, you have the wrong oil, it is not filled enough (60-75%), or there is a leak in your system. This pump can reach a deep vacuum.
@@suki4410 it wasn't the wrong oil, I show in the video it is filled to the proper level, and I show how it holds the vacuum in the chamber of I close the valve. Best explanation I have gotten is this is at 7500 feet altitude
@@TheSorters In my opinion, the altitude has no effect on the vacuum, or the pump. It should be able to reach at least 25 inches of mercury. Your connection is not airtight.
The plastic cap by the inlet hose wasnt on all the way and was leaking on mine. That was the fix.
Most likely that is what it was ..the sell everything so u can spend money ..every hvac vaccum comes with plastic caps.they should send em out with brass caps
That’s good for R134.
What altitude are you? Ive read this can affect its performance
In the mountains at 7500 ft, that might explain it
@TheSorters I'm 4500 in utah and mine will reach 25 in.
@@TheSorters At 7500 ft, the air pressure is about 0.7-0.8 Atm, which means that you are probably reaching the full vacuum of the pump, you'd need an absolute vacuum gauge to measure the actual pressure inside of the chamber
What is your elevation ? Are you in Denver ?
7500 ft, even higher than Denver
P
Pump is probably not rated for"continuous use"......
I only ran it for 5 or so minutes at a time. I am getting quite a bit of oil back into the vacuum chamber, so maybe it is getting too hot?
@@TheSorters BS. This pump, can run many hours, if there is enough oil in it, and the temp outside is not too high.
@@suki4410 it was 75 degrees and oil at proper level. 7500 feet altitude though