My old job was as a research chemist in Palo Alto, we used welsh pumps all the time because we needed to pump down large volume equipment. Your obsession with high flow is serious overkill to get the job done, great for demonstration of theory but not practical for daily use. Love your videos and explanation theory anyway, great job.
@@woodway11 time is money. I’d rather spend 10 minutes on a vacuum, then one hour and still charge one hour minimum service Every service is between $379 and $800 max parts and material to be completed within 1.4 hours. I’d rather spend 10 minutes to reach my final vacuum because you still charge the same amount whether you spent 10 minutes or one hour. And you can do several extra jobs because of it . It’s the difference between the thinking of somebody in business where profit and losses have to do with time and somebody who An hourly paid blue-collar Walker, who doesn’t think about profits and losses of the business only a paycheck. We can still be making furniture using knives and saws by hand to carve out every piece of wood and hand fit them together, and we can still be weaving our own cotton wool to make fabric to cut and hand fit the furniture and handpick goose down feathers Or do we invest in equipment that can do this 100 times faster than a human being mass production . Would still be in the medieval ages .
There’s a lot of money on that table. I think there’s too many possible ways for it to leak. If I could play around with this I’d build a small manifold and braze it together.
@@markm0000 yes I know exactly what you’re talking about with all those connections But these connections in the scientific world in laboratories are proven time tested Of course one singular solid piece of metal properly welded and the word is properly Does have a much higher percentage of chance of near 0% failure rate But your micron gauge quickly tells you whether you were successful at all your connections or not . I’m walking somebody through right now to find out where they have been failing on their brand new manifold and refrigerant hoses After 18 hours of vacuum are not capable of getting below 350 µm There is definitely a problem in his rig one of his connections somewhere When he turns off the vacuum source, the vacuum decays to 29 inches .9 That is definitely a problem that is not moisture content And the thing is if somebody had a set of manifold gauges that were analog they would never know there’s a problem because 29.9 analog gauge needle will be pegged all the way to the end Only the micron gauge was capable of catching the problem
Hey Tom Ive been binge watching your videos today and while Im just a DIY home mechanic, I have your same mindset where I dive deep into my projects. My question is in regards to recharging my vehicle's ac system. Unlike you, I just have 3, 12oz cans, not a 25lbs tank. My idea is to draw a vacuum on the low side (straight from vac to low side quick fitting). Then on the high side, put a valve core tool onto the quick disconnect and connect charging hose directly to the 12oz can. Charge the system with the upside down can (obviously keeping car off), then when first can is empty, close off valve core tool, switch cans, purge and keep filling until I get to the proper weight. This method eliminates the use of the manifold gauges and since I am just worried about R134a wweight, they arent really needed at this stage. Let me know if Im tracking correctly or if Im overlooking something! Love the videos, thanks!
@@Jonathan-gz6tu you may have a problem filling 100% with your small cans From the high side only. It can be done But if it’s your first time doing this high chance it’s not going to completely change. Probably stop after the first can. If you know and completely throughly understand the three gas laws you will succeed. If you don’t, you will fail. It’s that simple
@@coldfinger459sub0 awesome. Thanks for the response. I'll try to wrap my head around the gas law and see what happens. I guess if it won't take it all, I'll just connect the gauge set (or straight hose) and charge the rest as a gas through the low side with the car running.
I am in the same boat as you about two years ago. I watched Mr. Lech's videos religiously while working on my daughter's Volvo S60. I invested in the Fieldpiece SMAN 480 to get the 4th port and the micron gauge, per Mr. Lech's advice. Like you, I was charging with cans since I had not passed the test or been certified to purchase refrigerant in bulk. Like Mr. Lech said, I found the first can would not completely empty, even though I had pulled the vacuum well under 200 microns. I had to finally start the car and fill the remaining refrigerant with the A/C compressor running through the low side to finish the first can and a subsequent can.
Good god I just looked at the cost and weight of that vacuum pump. I'll stick with my 1/2" hoses on a JB 7 CFM just so I don't split my back hauling it onto the roof.
Not too old yet. Just cautious. But in all seriousness, do you haul that onto roofs for any HVAC work? Or is that a “ground unit”. I don’t think anybody will argue its effectiveness.
@@elBusDriverKC I have another one . Yes it goes up the roof for large VRF 20 ton to 60 ton heat recovery system I sell and my son and I install LG MUTI V
I love your thinking there’s no such thing as overkill a man after my own heart
HVAC Jesus “my vacuum pump isn’t that big” me “bullshit, I bet it could suck a golf ball through a garden hose!”
@@zackarymcclain164 🤣👧⛳️
My old job was as a research chemist in Palo Alto, we used welsh pumps all the time because we needed to pump down large volume equipment. Your obsession with high flow is serious overkill to get the job done, great for demonstration of theory but not practical for daily use. Love your videos and explanation theory anyway, great job.
@@woodway11 time is money.
I’d rather spend 10 minutes on a vacuum, then one hour and still charge one hour minimum service
Every service is between $379 and $800 max parts and material to be completed within 1.4 hours.
I’d rather spend 10 minutes to reach my final vacuum because you still charge the same amount whether you spent 10 minutes or one hour.
And you can do several extra jobs because of it .
It’s the difference between the thinking of somebody in business where profit and losses have to do with time and somebody who An hourly paid blue-collar Walker, who doesn’t think about profits and losses of the business only a paycheck.
We can still be making furniture using knives and saws by hand to carve out every piece of wood and hand fit them together, and we can still be weaving our own cotton wool to make fabric to cut and hand fit the furniture and handpick goose down feathers
Or do we invest in equipment that can do this 100 times faster than a human being mass production .
Would still be in the medieval ages .
Tall tree
Thanks for showing this! One thing I added to my fieldpiece manifold is a r12 to r134a adapter on the hose parks so I can keep the couplers attached.
That's Euuge!
There’s a lot of money on that table. I think there’s too many possible ways for it to leak. If I could play around with this I’d build a small manifold and braze it together.
@@markm0000 yes I know exactly what you’re talking about with all those connections
But these connections in the scientific world in laboratories are proven time tested
Of course one singular solid piece of metal properly welded and the word is properly
Does have a much higher percentage of chance of near 0% failure rate
But your micron gauge quickly tells you whether you were successful at all your connections or not .
I’m walking somebody through right now to find out where they have been failing on their brand new manifold and refrigerant hoses
After 18 hours of vacuum are not capable of getting below 350 µm
There is definitely a problem in his rig one of his connections somewhere
When he turns off the vacuum source, the vacuum decays to 29 inches .9
That is definitely a problem that is not moisture content
And the thing is if somebody had a set of manifold gauges that were analog they would never know there’s a problem because 29.9 analog gauge needle will be pegged all the way to the end
Only the micron gauge was capable of catching the problem
@@coldfinger459sub0 ok
Hey Tom Ive been binge watching your videos today and while Im just a DIY home mechanic, I have your same mindset where I dive deep into my projects. My question is in regards to recharging my vehicle's ac system. Unlike you, I just have 3, 12oz cans, not a 25lbs tank. My idea is to draw a vacuum on the low side (straight from vac to low side quick fitting). Then on the high side, put a valve core tool onto the quick disconnect and connect charging hose directly to the 12oz can. Charge the system with the upside down can (obviously keeping car off), then when first can is empty, close off valve core tool, switch cans, purge and keep filling until I get to the proper weight. This method eliminates the use of the manifold gauges and since I am just worried about R134a wweight, they arent really needed at this stage. Let me know if Im tracking correctly or if Im overlooking something! Love the videos, thanks!
@@Jonathan-gz6tu you may have a problem filling 100% with your small cans From the high side only.
It can be done
But if it’s your first time doing this high chance it’s not going to completely change.
Probably stop after the first can.
If you know and completely throughly understand the three gas laws you will succeed.
If you don’t, you will fail.
It’s that simple
@@coldfinger459sub0 awesome. Thanks for the response. I'll try to wrap my head around the gas law and see what happens. I guess if it won't take it all, I'll just connect the gauge set (or straight hose) and charge the rest as a gas through the low side with the car running.
@Jonathan-gz6tu yes if it does not take it all in you can finish it up like you say in vapor form gas through the low side with the car running.
I am in the same boat as you about two years ago. I watched Mr. Lech's videos religiously while working on my daughter's Volvo S60. I invested in the Fieldpiece SMAN 480 to get the 4th port and the micron gauge, per Mr. Lech's advice. Like you, I was charging with cans since I had not passed the test or been certified to purchase refrigerant in bulk. Like Mr. Lech said, I found the first can would not completely empty, even though I had pulled the vacuum well under 200 microns. I had to finally start the car and fill the remaining refrigerant with the A/C compressor running through the low side to finish the first can and a subsequent can.
Please make a video when your going to modify the fittings
@@sameermohammed3949 yes I do wanna make that video and I will post it when I do it.
Amongst my 10,000 other projects
Daaaaamn
Good god I just looked at the cost and weight of that vacuum pump. I'll stick with my 1/2" hoses on a JB 7 CFM just so I don't split my back hauling it onto the roof.
@@elBusDriverKC you are correct this is definitely not for old men.
Not too old yet. Just cautious. But in all seriousness, do you haul that onto roofs for any HVAC work? Or is that a “ground unit”. I don’t think anybody will argue its effectiveness.
@@elBusDriverKC I have another one . Yes it goes up the roof for large VRF 20 ton to 60 ton heat recovery system I sell and my son and I install LG MUTI V
@@coldfinger459sub0 I mostly do light commercial so my systems are from the 5 to 20 tons. That big boy makes sense on 20 to 60 tons.
@@elBusDriverKC I have a video of me using one on a tiny little 9000 BTU mini split