I've been doing this same thing for a number of years and recently upgraded my 21 gallon tank (that went bad) to a 100lb propane tank and it's connected to a 26 gallon 150psi unit. When I'm really eating up the air, having them both available with a shared air source really keeps my high demand tools going. When in standard mode (as I call it), I let the oil filled compressor head do all the work. Mainly because I don't care for how noisy the new oiless compressors are. I have modified the pump and plumbing on the propane tank with a separate regulator and 1/4" "T" connection so I can run two air lines simultaneously. Comes in handy when I'm using two air tools. Excellent tutorial Brice! Cheers!! Zip~
Industrial version: 10 HP/ 208 3ph/2 stage with 120 gallon tank + 5 HP/208 3ph/2stage w/80 gallon. In this case, the shop just wants to run the smaller compressor when running all of the light stuff, but then the big one adds in when the sandblast operation 40CFM is in operation. So the small one normally cycles on an off, on light duty. It kicks in before the big one, unless the sandblast overwhelms it and the pressure keeps dropping, Then the big one kicks in a few psi lower and they both pump up to max and stop. There are no regulators between the tanks, they equalize, joined in a manifold before going through a water trap then refrigerated drier
So if I understand you correctly, you just have a line out from each of the normal tool quick connects on each compressor, that joins together before entering the ‘conditioner’ unit, which then feeds the tool / shop. Right?
@@dginta7932 Well the compressors tanks have 3/4" NPT ports, so we use pipe fittings - and we have a ball valve on each, then into 3/4" air hose, then the two hoses are joined in a custom 3/4" L copper manifold - then through some oil and water traps, then into a drier, then into a long run of 1" dia air hose into another custom copper output manifold that has 6 taps with hose - threaded fittings into those. We avoid quick disconnects until we reach the very end of the line where we are using tools. But for sandblast cabinets or pressure pots we make hard connections. But yes, the two hoses are just joined and if only one compressor was working it would pump up both tanks (unless you close a ball valve)
What a great Idea ......I never would have thought of doing this ..I have added an extra tank to a compressor for more reserve air but that made the compressor over run I see now how this works
+not2fast4u2c Yes I have done this before with my mini compressor but with the 10 gallon it make a big difference. Got to be careful though compressed air is dangerous.
Would it work better if you had both compressors airing up a separate air tank and then getting your air from the tank? I have a couple compressors in the garage and a big air tank. Wondering if I can put everything together and run some big air tools off of it.
Yes Brian, this is the ideal solution. That way, both compressors are feeding a single point which the main tool line is tapping into, and neither compressor is interfering with the other with air bleed-back etc if you have check valves on each compressor outlet. You could accomplish a similar result by connecting the two compressors to a tee fitting installed on one of the compressors and attaching a regulator to the spare port on that fitting then out to your main line. But, the additional advantage of having the auxiliary/holding tank is that it acts as a big water separator. The air accumulates and settles and allows moisture to condense out of it before it goes into the mainline.
I was hoping to see a setup where there is a master pressure switch with relays that guide both air compressor motors, resulting in simultaneous power for Cut-in and Cut out pressures. I'm needing this for a tire changing machine that is very AIR HUNGRY.
Nice video. Why can’t you just come out of the ‘quick connect tool output’ on one compressor to a ’Y’ fitting, and out of the ‘quick connect tool output’ on the second compressor to the same ‘Y’ fitting, then both feed into one hose that feeds the tool? Thanks.
I would have to do some figuring, but the CFM's don't accumulate so your CFM is likely what ever is coming out of what ever compressor the hose is connected to. At least that is my understanding when I looked into it last year.
Yes ... I'm not convinced that running two compressors in parallel (using a tee) gives you the sum of the two CFMs. I know this 'seems' to make sense, but I tried this yesterday with two brand new 4 Gal, 6.8 CFM Husky units, and I did not see any difference with CFM output, wherein at the end of the hose was a 3M Accuspray HVLP gun that requires 13 CFM @ 20 PSI.
Good one as always Bruce the Godfather or Small Engines. My neighbor has compressor like your big one with a 20 gallon slave storage tank plumbed into it for more air. Do you have same air pressure set the same on both units to keep from over filling the tanks?
+Raymond Campbell Well the main tank is 50 years old so I set it at 120 lbs. The smaller one is set just a smidge (word?) below that, so that it shuts off first and doesn't run all day filling the 2.
I have a 3.3 hp 20 gal tank max 100psi 10cfm @40 psi and a craftsman 5.5 hp 30 gal max psi 130 @ 40 psi 8.6 cfm.. and im connecting my paint guns. Which one should be in the back and which one should I connect to and where to I put my brass T to connect the two? At the over flow valve and put the over flow valve into the back side of the t? And then should I run water filter e r between the two air compressor with two 5ft hoses with the filter in the middle connecting tandem compressors ?theb run a the another 25ft hose coming out the main compressor(no brass t just out of the coupler?) with my filter and dryer systemat the end then to my 50ft hose to my paint gun?? I know im confusing but I'm learning as I go any and all input will help especially pics. Appriciate the help
I am sorry I am not sure if i can help you. I connect the 2 tanks together at tank pressure then use the regulator at either tank to feed my tools. Sorry if I haven't gone far enough. Remember to be careful above all else.
hay sir I want to ask, I have 2 compressors. which one has a capacity of 12 liters and 30 liters, I want to combine it, so that there is more air filling, and I will only turn on one machine, is it safe?
I've been doing this same thing for a number of years and recently upgraded my 21 gallon tank (that went bad) to a 100lb propane tank and it's connected to a 26 gallon 150psi unit. When I'm really eating up the air, having them both available with a shared air source really keeps my high demand tools going. When in standard mode (as I call it), I let the oil filled compressor head do all the work. Mainly because I don't care for how noisy the new oiless compressors are. I have modified the pump and plumbing on the propane tank with a separate regulator and 1/4" "T" connection so I can run two air lines simultaneously. Comes in handy when I'm using two air tools. Excellent tutorial Brice! Cheers!! Zip~
+ZippoVarga Thanks It means a lot. There has been some negative posts lately. Bruce
Do you have a troll?
+ZippoVarga Things have settled down in the last few days.
Industrial version: 10 HP/ 208 3ph/2 stage with 120 gallon tank + 5 HP/208 3ph/2stage w/80 gallon. In this case, the shop just wants to run the smaller compressor when running all of the light stuff, but then the big one adds in when the sandblast operation 40CFM is in operation. So the small one normally cycles on an off, on light duty. It kicks in before the big one, unless the sandblast overwhelms it and the pressure keeps dropping, Then the big one kicks in a few psi lower and they both pump up to max and stop.
There are no regulators between the tanks, they equalize, joined in a manifold before going through a
water trap then refrigerated drier
So if I understand you correctly, you just have a line out from each of the normal tool quick connects on each compressor, that joins together before entering the ‘conditioner’ unit, which then feeds the tool / shop. Right?
@@dginta7932 Well the compressors tanks have 3/4" NPT ports, so we use pipe fittings - and we have a ball valve on each, then into 3/4" air hose, then the two hoses are joined in a custom 3/4" L copper manifold - then through some oil and water traps, then into a drier, then into a long run of 1" dia air hose into another custom copper output manifold that has 6 taps with hose - threaded fittings into those. We avoid quick disconnects until we reach the very end of the line where we are using tools. But for sandblast cabinets or pressure pots we make hard connections. But yes, the two hoses are just joined and if only one compressor was working it would pump up both tanks (unless you close a ball valve)
What a great Idea ......I never would have thought of doing this ..I have added an extra tank to a compressor for more reserve air but that made the compressor over run I see now how this works
+not2fast4u2c Yes I have done this before with my mini compressor but with the 10 gallon it make a big difference. Got to be careful though compressed air is dangerous.
Would it work better if you had both compressors airing up a separate air tank and then getting your air from the tank? I have a couple compressors in the garage and a big air tank. Wondering if I can put everything together and run some big air tools off of it.
These are built as a dual tank 1 source compressor for carpenters etc, The tanks are connected Thanks for the great comment
Yes Brian, this is the ideal solution. That way, both compressors are feeding a single point which the main tool line is tapping into, and neither compressor is interfering with the other with air bleed-back etc if you have check valves on each compressor outlet. You could accomplish a similar result by connecting the two compressors to a tee fitting installed on one of the compressors and attaching a regulator to the spare port on that fitting then out to your main line. But, the additional advantage of having the auxiliary/holding tank is that it acts as a big water separator. The air accumulates and settles and allows moisture to condense out of it before it goes into the mainline.
I was hoping to see a setup where there is a master pressure switch with relays that guide both air compressor motors, resulting in simultaneous power for Cut-in and Cut out pressures. I'm needing this for a tire changing machine that is very AIR HUNGRY.
You may have to spend some money If it is commercial you can cut corners like this. Sorry.
Nice video. Why can’t you just come out of the ‘quick connect tool output’ on one compressor to a ’Y’ fitting, and out of the ‘quick connect tool output’ on the second compressor to the same ‘Y’ fitting, then both feed into one hose that feeds the tool? Thanks.
You should do it on the upstream side of the regulator
I would have to do some figuring, but the CFM's don't accumulate so your CFM is likely what ever is coming out of what ever compressor the hose is connected to. At least that is my understanding when I looked into it last year.
Yes ... I'm not convinced that running two compressors in parallel (using a tee) gives you the sum of the two CFMs. I know this 'seems' to make sense, but I tried this yesterday with two brand new 4 Gal, 6.8 CFM Husky units, and I did not see any difference with CFM output, wherein at the end of the hose was a 3M Accuspray HVLP gun that requires 13 CFM @ 20 PSI.
Good one as always Bruce the Godfather or Small Engines. My neighbor has compressor like your big one with a 20 gallon slave storage tank plumbed into it for more air. Do you have same air pressure set the same on both units to keep from over filling the tanks?
+Raymond Campbell Well the main tank is 50 years old so I set it at 120 lbs. The smaller one is set just a smidge (word?) below that, so that it shuts off first and doesn't run all day filling the 2.
OK thanks Bruce.
I have a 3.3 hp 20 gal tank max 100psi 10cfm @40 psi and a craftsman 5.5 hp 30 gal max psi 130 @ 40 psi 8.6 cfm.. and im connecting my paint guns. Which one should be in the back and which one should I connect to and where to I put my brass T to connect the two? At the over flow valve and put the over flow valve into the back side of the t? And then should I run water filter e r between the two air compressor with two 5ft hoses with the filter in the middle connecting tandem compressors ?theb run a the another 25ft hose coming out the main compressor(no brass t just out of the coupler?) with my filter and dryer systemat the end then to my 50ft hose to my paint gun?? I know im confusing but I'm learning as I go any and all input will help especially pics. Appriciate the help
I am sorry I am not sure if i can help you. I connect the 2 tanks together at tank pressure then use the regulator at either tank to feed my tools. Sorry if I haven't gone far enough. Remember to be careful above all else.
Would this setup be ideal for spray painting?
My thoughts too.
hay sir I want to ask, I have 2 compressors. which one has a capacity of 12 liters and 30 liters, I want to combine it, so that there is more air filling, and I will only turn on one machine, is it safe?
I think so.. one machine may over heat just watch it.
thank you...