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32 votes
Accepted

Is it safe to connect two air compressors together to increase the air flow output?

Just parallel them This will work fine as long as the compressors are reasonably close in pressure rating (bar, atm, kPA or PSI). It is vital they be reasonably close, because both/all tanks will ...
Harper - Reinstate Monica's user avatar
11 votes

How can I safely leave my air compressor on at all times?

I think you are over engineering your solution. It is a small 1HP 4.1 CFM compressor with a small 2.5 G receiver and 90 PSI max operating pressure. The copper pipes will not burst in your lifetime. ...
Clarissa's user avatar
  • 133
11 votes

Is it safe to connect two air compressors together to increase the air flow output?

I would use both compressors to feed a reservoir with oneway valves on each supply. That way any small pressure difference will not reverse feed a compressor.
Solar Mike's user avatar
  • 27.7k
9 votes

How can you determine if an air compressor tank is safe?

Take it to a shop that either does hydrostatic testing, or has an arrangement with a place that does. It will cost far less than $100, barring a major ripoff. Any place that deals in compressed gasses ...
Ecnerwal's user avatar
  • 218k
6 votes

Is it safe to connect two air compressors together to increase the air flow output?

I don't think there's any particular issue with connecting 2 compressors as long as pressure ratings match, at least in terms of safety. However small compressors are often not rated for anywhere near ...
Ryan Callaghan's user avatar
5 votes

Air Pressure and Ball Valves

NO , a ball valve only will control flow. If you even allow a slight orifice the size of a human hair with time the chamber pressure would be at 800 psi. I would look for a used scuba regulator they ...
Ed Beal's user avatar
  • 103k
5 votes

AC Unit Freezing

Call a service technician. Your system probably has a leak, and is low on refrigerant. The system iced up due to low refrigerant. Then as more refrigerant escaped, the system lost the ability to ...
Tester101's user avatar
  • 132k
5 votes

What's the point of the tank in an air compressor?

The tank is a buffer. Some benefits come to mind: With a tank, it becomes possible to use tools which require shorts bursts of air at higher flow volumes than the compressor/pump itself is capable of ...
Greg Hill's user avatar
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5 votes
Accepted

Does this air compressor fits this nail gun minimum requirements?

Forget about the air compressor for a moment. You should really reconsider getting the nailgun at all. First off, in your specific project, that nail gun is not going to do the job. The one linked and ...
whatsisname's user avatar
  • 2,425
5 votes
Accepted

Should the tank be pressurized when draining water from my air compressor?

It is safe to open the drain while the tank is fully pressurized. The compressed air helps force the water out of the tank. You do not have to de-pressurize the tank after using the compressor. Edit: ...
Triplefault's user avatar
  • 7,807
4 votes

How can you determine if an air compressor tank is safe?

There are several other ways to test a pressure vessel. Also, a hydro is not necessarily double, it's usually 125-150% of the safety valve pop, depending on the situation. A popular method today ...
Harper - Reinstate Monica's user avatar
4 votes

Want to drain/change compressor oil, but there's no outlet

If there's a window, you don't need a dipstick. If there's no lower outlet, open the inlet and turn it over. Or, suck it out (auto parts stores typically have something for doing that.) Compressor ...
Ecnerwal's user avatar
  • 218k
4 votes

Powering a 240V 15A air compressor with a 6-20 plug

Actually, it is a fielder's choice. Either way, all you have to do is make up a cord with #10 wire that is rated for 30 amps with a male plug on one and a female plug on the other to transition ...
ArchonOSX's user avatar
  • 20.1k
4 votes

Why won't my air hose engage the quick connector on a Fortress compressor?

There are 2 common types of connectors. Unless your female quick disconnect is a universal one, and you will need to get the other type of connector. This is assuming that you are pulling back on the ...
Ed Beal's user avatar
  • 103k
4 votes

How can I safely leave my air compressor on at all times?

You are over thinking this. I have a large compressor (about 50 gal) in my shop that never cycles unless I left an air tool connected to a hose that's leaking. I leave it powered up 24/7. It's ...
George Anderson's user avatar
4 votes
Accepted

Replace Unloader Line on Air Compressor

That line looks more like LDPE ("Alkathane") than PTFE ("Teflon") to me. To release the line press the collar/cuff firmly towards the fitting (perhaps use an open end wrench) then ...
Jasen's user avatar
  • 21.5k
3 votes

Using PEX Fittings with Nylon Tubing

There is a great video on YouTube by "The Build Show" about various PEX and push to connect fittings. They pump them up until they burst. They burst well above the stated ratings. Unfortunately I can'...
Joe Fala's user avatar
  • 6,374
3 votes

air-compressor size for continuous duty

Your tool and your compressor both have (or should have, but they probably do) ratings in "Standard Cubic Feet Per Minute" (SCFM) possibly stated just as CFM. The compressor SCFM needs to be equal to ...
Ecnerwal's user avatar
  • 218k
3 votes
Accepted

Can you use/store your air compressor (horizontal cylinder type) in vertical position?

Storing a oil less compressor in just about any position will be fine but make sure to blow the water out of the tank prior to storing it.
Ed Beal's user avatar
  • 103k
3 votes
Accepted

What's the point of the tank in an air compressor?

Tanks maintain a pressurized reservoir to allow for spiky usage (refilling a pneumatic tool) without having to cycle the compressor pump/motor/engine every time. This prevents short cycling for energy-...
Steven's user avatar
  • 522
3 votes

Why is my compressed air tank rated to 200psi @400°F? Why the temp rating?

Air tanks are pressure vessels. As such they fall under your local code authority. In the US, that would be ASME (American Society of Mechanical Engineers) and their ASME Boiler and Pressure Vessel ...
Jon Custer's user avatar
3 votes

Does this air compressor fits this nail gun minimum requirements?

You need a compressor with specs that equal or exceed the requirements of the nail gun. The compressor you are looking does not meet the requirements and, luckily, both have been given in the same ...
Solar Mike's user avatar
  • 27.7k
2 votes
Accepted

Powering a 240V 15A air compressor with a 6-20 plug

Put a 30A cord on it You should be able to remove the existing cord from the compressor and attach a 30A cord (10AWG cordage, either terminating in a 6-30 or a 14-30 with the neutral wire at the ...
ThreePhaseEel's user avatar
2 votes

Powering a 240V 15A air compressor with a 6-20 plug

TLDR: you must follow the labeling or instructions on the motor or compressor. You can change breakers without changing wires. The rules for 240V receptacles are exactly the same as for 120V ...
Harper - Reinstate Monica's user avatar
2 votes

My Porter-Cable Air Compressor is drawing too many amps

At 15A, that is a 3HP motor (assuming 240V single phase here), the "6HP" is a marketing term that means WHEN the motor is slowed down by a change in the load to it's "Break Down Torque" speed, it will ...
JRaef's user avatar
  • 15k
2 votes
Accepted

Is it possible to store air compressor filled without damage from water?

Automatic blowdowns This taps the bottom of the tank where water would accumulate. At intervals, it blows some air out of the tank. PSHHHHHT! This ejects most of the water and some air. This ...
Harper - Reinstate Monica's user avatar
2 votes

Is it possible to store air compressor filled without damage from water?

That statement means after four hours of run time. Storing air doesn't cause water accumulation. I'd drain it every few months if you only use it occasionally. The fact of the matter is that there ...
isherwood's user avatar
  • 139k
2 votes

Is it possible to store air compressor filled without damage from water?

Pressure tanks are usually steel, steel is somewhat flexible, it stretches a bit when filled, if the tank is left full it can shorten the life of the tank, I used to have a small scuba shop and did ...
Ed Beal's user avatar
  • 103k
2 votes

air-compressor size for continuous duty

I used a 90 PSI needle scaler (Ingersoll-Rand Model 125) for two weeks, four hours a day of nearly continuous scaling. This needle scaler consumes 8 SCFM. My compressor was an Ingersoll-Rand Model 30 ...
MTA's user avatar
  • 11.4k
2 votes
Accepted

Confused about 230V Air Compressor Wiring

You are in the wrong section, 440 is refer equipment, you need too roll back to section 430, Motors, Motor circuits, and Controllers. Part III Motor and Branch circuit protection Then look at label: ...
NoSparksPlease's user avatar

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