An idea, why not use the output of the regulator you have to trigger both compressors? If you put a contactor/relay between the regulator output and the left compressor the switching load will not increase for the regulators internal relay. Better yet, get a Time Delayed Contactor set to a couple of seconds so you won't have both the compressors pull starting amperage at the same time.
Did I hear you wanted to hook the compressors into the light circuit? You might need a relay to control a separate circuit for the compressors, check your local codes. In some places code violations could/may invalidate your insurance coverage, my area is one. Also as you have likely been informed already, pressure switches are readily available and simple to install, some are even adjustable to stagger the starting of the motors. I set up two compressors exactly that way, but one is a lower pressure (a freebee at 125 PSI) so they don't usually start at the same time. Using 1/4 in pipe and fittings, I was able to keep both pressure reliefs and put a female quick disconnect on both compressors (one with a valve). The connecting hose has two male connectors and both tanks rest at 150 psi. The valve is to disconnect that hose without a rush of escaping air -if you do it right. It also allow use of only the smaller one to "exercise" the motor, switch and pump because it rarely turns on, besides draining the condensate.
Removing the relief valve, and you said it does not shutoff automatically? If your main switch fails/malfunctions something is gonna blow!!!!! Just an observation!!!!
Ok, but if both compressors are running and the main switch fails and continues to compress air and the little one is running is the 1 relief valve enough to compensate for both tanks. They are there for a reason. I am an engineer and in my world we never remove safety items, it was installed by the manufacturer for safety reasons and you and doing something that the manufacturer never intended to be done. Like I said just an observation!!!! Matches starts fires, pressure makes diamonds!!!!
Yea no doubt, it should be there to be safe but I would never run these unchecked and 99% of the time I’m only running the big tank by itself with the other tank just being there as a reserve tank with no issues
The better way is to include a pig tank, a third tank that receives the air in common from both compressors. Metabo has a 20 gallon tank with multiple connections that works great for this purpose.
How is this way better? So long as the compressor pump meets or, preferably, exceeds the gun's specified cfm rate, you don't need any receiver tank. A receiver is solely for storage. Once you deplete that, you have to wait for a smaller pump to catch-up.
@tomb816 this has two pumps with more capacity the last thing you want is to lose air pressure while painting or do sand blasting for 20 minutes then wait another 5-10 to build up enough for me this setup worked perfect for both and gave me the capacity to do both without issue yes you can buy a massive compressor but I spend maybe 150 bucks and got what I needed
@@NRMotorsports I understand your needs. I was simply replying to farmalmta regarding receiver tanks. They're not necessary for the application, so long as the pumps meet or exceed capacity and/or runtime isn't longer than any receiver's capacity.
I know that this is a 2-year old video. But you mentioned “purge valves”. I’m not familiar with purge valves on air compressors. I hope you didn’t remove the pressure safety valves that have the little key ring on its end. That should never be removed. You can add a T-fitting to the outlets. But please don’t mess with the safety pressure valves
Still intact the only issue I have is the small compressor doesn’t have an auto cut off like the bigger one so the safety valve will go off if I keep that one running but 90% of the time I don’t need both motors going and only run the small to fill up quick or keep it on for big projects like painting a car or sand blasting
@@NRMotorsports just make sure and you test your one good safety valve. They are pop off valves that pop open when pressure gets too high. Anyway, glad you’re good and I’m getting ready to join my two small compressors. It’s the only option for painting in my opinion
Probably can't connect both compressors to the same outlet on the same breaker circuit. Probably going to have to run an extension cord across the house to different outlets. This will probably trip the breaker everytime if not.
I have done this before and all I did was attach an extension cord to the auto shut of on the side that connects to the compressor and plug the aux compressor into this so when the big one shuts off it disconnects the smaller one
Put a relay box on the compressor that has the switch and run the power of the second compressor through the relay. Otherwise if you are running 110/120, you can split a 220v between the two machines off the 1 one switch. (Just make sure both chassis are grounded together) Or wire a box that runs either hots or neutrals through the switch on one side with the other straight to the motor (hard wire method) If you need to keep both compressors mobile, then the $30 pressure switch would work well and are easy to install before your regulator.
@@NRMotorsports one thing I forgot about was unloading. You should run an unloading tube from the switch to the pipe between the check valve and compressor on the second machine, of it doesnt already have it's own unloader setup (manual governor vs electric) If this isn't done, the compressor will have a higher starting load and can damage the motor and capacitors over time.
Them things you're calling Purge valves are not Purge valves you're purge valve is on the bottom of the tank what you're calling a purge valve from what I can tell and I'm pretty sure I'm right is a over pressure relief valve in case your pressure switch sticks it will blow that pressure relief valve off instead of blowing the tank apart and throwing shrapnel everywhere you didn't leave the camera on and I couldn't really see but I've never heard of a purge valve on air compressor it's not a purge valve it's a high air pressure safety release valve and it needs to be there if not you're taking your life in your own hands you can take that advice however you want it LOL
Why not combine the air lines output of each of your existing compressors into a tee, just be sure to install backcheck valves between each compressor and the tee, backcheck valves here: 3/8+inline+check+valve+air+system. Less than $20.00 and problem solved and you retain pop off valves on both compressors
I actually am going to try the method you described. I secured a tee to a wood shelf and have 2 6 foot hoses going into the tee. Waiting for the check valves to show up so I can add those. Then off the tee i'm attaching to the wall a loop that goes down then back up to a decent quality double filter with regulator. I only need the 2 compressors when I paint and if needed, I will run one off a generator if the garage circuit can't handle it. I'm hoping this gives me the extra air I need to be able to paint without needing to pause much
I think i had an auxiliary connection on my switch ? i would think the start up might overload the breaker if run both off same switch? bigger breaker?
Would connecting two compressors to a reserve tank work? I have a 8 gal reserve, also have a few 1 gal. I was thinking - each compressor out into it's own 1 gal tank- then out into 8 gal reserve tank-. I was thinking the 1 gal tanks would allow me to control compressor run time better. I have small compressors and don't want to burn 1 up by it being ran more.
Definitely the only thing I would make sure is each tank has a pressure relief valve other than that I wouldn’t see an issue it’s just giving you more volume available, 90% of the time I only run one motor unless I need the extra psi
Yes it doesn’t have a kill switch from factory but it has the pressure release valve so it’s still safe. I only turn the smaller motor on when the demand is higher but 99% I just run the bigger motor alone with the volume from both tanks I never really need the second one unless I’m painting or sandblasting
Would it be necessary to run both motors? Im just curious would one motor just kick on when air was low? Or maybe it wouldn’t keep up with that much air?
I only run one motor when in use and power up the second one if I’m doing something where I need the extra volume. The one is more then enough 99% of the time
That's sick Guy, I'm going to try that. I have two compressor's and both of them aren't big enough to run my air tools but together I bet they will. 🤘 Good look brother.
Thats not an purge valve or a air bleeder it’s an emergency relief valve, if the pump does not shut off and over pressurerises the tank it will pop open and let out around 50 PSI
If you take the power wire from the little one and wire going into the little ones motor and wired into the pressure switch on the big compressor you have to look and see which one's going to the motor on the pressure switch I believe it's the two inside screws and put them on them two poles it's very simple did you wires going into the motor not the two wires from the plug on the big one the two wires going in to the motor on the big one hook the two wires from the motor on the little one on the same two poles and that pressure switch will control boats compressors at the same time they will both come on and off at the same time
@@NRMotorsports no problem but you absolutely need to put them safety blow-off valves back in that is very dangerous it looks like that's what you took off every compressor has one if there's a little ring on the end that is a high pressure relief valve very important that is in please that's not the one you took off it's all good LOL what it look like that was what you took off from what I could tell I have a good one
I am just wondering if you could hook them both up but only run one because I have an old compressor that I can't get a pump for but I just want to buy another 60 gallon compressor then I'll have 120 gallons of air?
Don't know if you're getting comment to your old video but were you able to keep your well to keep your electric breaker from popping running 2 air compressors at 1 time
Yes sir I wired the whole garage with thick gauge wire when I built it, but when I installed the breaker the store only had a 20 available went down and got a 60 double breaker and I can run both air compressors and weld at the same time no issues
@@NRMotorsports Nice I can't do that to this house everything's already prewired when I bought it I don't wanna tap into electric I just ran one compressor off of the inside plugs and the other one off the garage plug for now to keep them both going I'm gonna keep my ass inside while they both fill up 1st time doing this I don't want a shrapnel bomb to go off so I'll wait and see if they turn off by themselves they both have regulators to turn off but I have never used 1 tank to fill another Kind of scary
@@romeyrome3219 I was the same way at first, now I honestly only run one on to fill both it shuts off by itself and when I need the extra volume for like painting or sand blasting then I run both but it’s been flawless on just one running so far
I'm with David. That was way too quick to be of any real use to me. If you treated it as a tutorial it would be useful. Having said that, thanks for the ideas and your effort in making the video.
First off I would like to thank you for the quality and good volume, I was trying to learn how to connect two compressor tanks together and most of the videos out there are very low volume quality. Crappy videos!! Thank's on video it really help me on how to connect my compressor and auxiliary tank
I have been kicking around connecting two similar compressors like you did so that I can run my 1 inch air impact and larger hose when needed. The only drawback I see to your setup for my application would be the limited volume of transfer between the compressors. In this configuration you will reduce how long and how often they run as long as it's a continuous moderate flow like painting or a smaller sand blaster. I plan to connect both compressors to a manifold to go to the output hose (1/2- 3/4) hose for the higher volume and reduced restrictions.
