I have done this from time to time. I have the FP(company provided) and my personal JB. Usually will do this on walk ins that I know have a lot of moisture in them. Anything to make the task quicker.
@@jasonjohnsonHVACyep. Luckily there is only a 1 cfm difference between pumps so never had an issue with pulling oil out of the other. I did a test to see how big of a difference it made and it decreased vacuum time by 40%. Decay only went up by 17 microns. People will say it’s overkill but when I can hit another job while another person is still pulling a vacuum. Speaks for itself.
When its planned out correctly it work great. I made this video to get newer guys into thinking about how to accomplish a long task, much quicker. I also have used 2 pumps many times myself. Thanks for watching and the comment
Same here. Really a necessity on the big stuff if you don't want the vacuum to take forever. I've heard that you can run the risk of pulling pressure too low too rapidly and freezing moisture, but I haven't seen it yet.
@@topher8634 i have as well, I really think that applies to smaller equipment as the internal surface area is much smaller. Even doing it this way, the vacuum isn't that fast....but it sure cuts the time down significantly
@smalljobrob6432 it will with unequal sized pumps....and i have seen it happen when I first tried it many years ago. I had to do some learning on how to do it correctly. It can also be done by piping the pumps in parallel. Thanks for the comment
Neat little trick Jason ... You learn something new every day ... Thx
@Eddy63 thanks for the continued support. I appreciate it.
This is clever!
@@FroggieBeluga i wanted to show my coworker another way to get the same thing accomplished
Nice job.
@RayRay-nb7tn thank you. Appreciate you checking it out.
@jasonjohnsonHVAC You are very welcome. Willing to learn from a great mentor in the trade.
What repair did you make beforehand? Great Thumbnail too 😅
@@subcoolHVAC economizer line leak. Granted....it wasn't the issue that caused the fault.....but a leak is a leak. Thanks for stopping by
I have done this from time to time. I have the FP(company provided) and my personal JB. Usually will do this on walk ins that I know have a lot of moisture in them. Anything to make the task quicker.
@fshn76 time is money and every employer will be grateful for it. It has to be done with thought as to not create an issue. Thanks Bryan
@@jasonjohnsonHVACyep. Luckily there is only a 1 cfm difference between pumps so never had an issue with pulling oil out of the other. I did a test to see how big of a difference it made and it decreased vacuum time by 40%. Decay only went up by 17 microns. People will say it’s overkill but when I can hit another job while another person is still pulling a vacuum. Speaks for itself.
I've used two pumps for years. Once the microns get low, pull off one pump.
When its planned out correctly it work great. I made this video to get newer guys into thinking about how to accomplish a long task, much quicker. I also have used 2 pumps many times myself. Thanks for watching and the comment
Same here. Really a necessity on the big stuff if you don't want the vacuum to take forever. I've heard that you can run the risk of pulling pressure too low too rapidly and freezing moisture, but I haven't seen it yet.
@@topher8634 i have as well, I really think that applies to smaller equipment as the internal surface area is much smaller. Even doing it this way, the vacuum isn't that fast....but it sure cuts the time down significantly
I’ve always heard it would do that but never saw an example of it sucking oil out.
@smalljobrob6432 it will with unequal sized pumps....and i have seen it happen when I first tried it many years ago. I had to do some learning on how to do it correctly. It can also be done by piping the pumps in parallel. Thanks for the comment