Best HVAC Vacuum Pumps – Make Air Conditioning Safe!

It is natural to expect our number one choice to be an overall winner in every aspect when it comes to being the best vacuum pump. And, as you would expect, this vacuum pump is deserving of the first spot in almost every review.

Well, we are not trying to overdo it by putting a feather on the cap of this product. Typically, it is a product that most people consider reliable and worth the investment. Robinair has been an industry leader for up to six decades. Therefore, you are right to expect quality vacuum pumps from them. But how do you know that this is a quality product? Well, for starters, a significant number of users are happy with the product. And as such, they have nothing but rave reviews regarding the product.

The various Robinair 15500 vacuum pump reviews from users with satisfaction are the best indicator and that this machine is quality. But which are these features that make it a top product? Is it efficient when it comes to working? Is it easy to operate? Well, the short answer is, pretty much. The vacuum pump can be your best companion when it comes to air conditioning repairs.

Among the useful features include compact and lightweight design. Therefore, this is one of the best industrial vacuum pumps because it is easy to carry and store. You don't need a lot of garage space to accommodate this device.

And to ensure the efficiency, the vacuum pump boasts a two-stage system that cleans the ac system better than anything else. At least, it is better than the one stage system. You can be sure that the vacuum pump works efficiently as you would want. And for some people, it exceeds their expectations. You see, efficient vacuum pumps, others such as this one, are not quite common. Therefore, this is one matching that you can refer to as a special breed.

Essentially, the two-stage action makes use of low pressure to achieve a better pull. Furthermore, it is durable and does not have any weak parts. The housing is cast aluminum.

The motor comes with strong thermal protection to ensure efficient working whether it is chilly or hot. In other words, the machine will start regardless of the weather. You can purchase Robinair vacuum pump oil ​ to ensure machine’s efficiency.

Shortcomings

The HVAC 2 stage vacuum pump requires a separate gauge, which may not be part of the package. Therefore, you may need to acquire it separately. Another issue that various users point out is hard to read manually.

Decision

Despite having a few negative complaints, the Robinair 15500 VacuMaster Vacuum Pump is the people’s choice and preferred by the experts. You can get everything in it from quality performance to safety. We call it the high-end vacuum pump for the minimum price. The two-stage unit is as good as you can expect if you can compromise with the negative issues. It will be worth your investment.

2. Kozyvacu TA350 Single-Stage Vacuum Pump

Our second choice is another decent choice for any garage or air conditioning technician. But first, it is important to note that this machine is a single stage vacuum pump. Our first choice is at what stage but that does not mean this single stage vacuum pump is not any better. In contrast, it is quite popular, and that says a lot. Don't you think so?

The vacuum pump comes with a robust endurable cast aluminum housing that protects the interior engine and mechanics from any damage. And despite the sturdy construction, the vacuum pump is lightweight. Nothing to worry about in that regard!

And unlike most of the other machines, the vacuum pump has a direct drive of the motor that ensures easy start and effortless maintenance. You don't need to worry about complicated controls and to service that may take a lot of your time and money. It is a machine for every professional, whether a beginner or a pro.

Another great functional feature is the oil viewing window. Mostly, you can tell when the oil needs a change or add. The feature is quite important as it ensures efficient functioning. The vacuum pump system requires a clean supply of oil if it is going to be effective.

The oil fill port is another feature that makes operation easy. Adding oil is as effortless as possible, and of course, that is a good thing. As someone once said, the genius in the production of successful consumer goods is in their simplicity. Therefore, this machine is as simple as you would expect. And that is what makes it great.

Shortcomings

Various Kozyvacu reviews from users say that it is not as powerful as a two-stage version. It’s true as you can’t expect a two-stage facility and power from a one-stage model. The hose seals performed poorly in a few cases. Furthermore, the gauge could have been much better.

Decision

We were surprised to see some of the complaints from the users as we completely disagree with those. It’s true that it has a few shortcomings as it happens in case of other quality products, but they are very much nominal compared to the excellent features it has and the facilities it provides. Regardless of everything, this is the best single-stage machine worth the price, and therefore we placed it in the second best position.

3. ZENY 3.5CFM Single-Stage Economy Vacuum Pump

Our third choice is this single-stage vacuum pump with a distinctive sturdy design that underscores durability in every way. Mostly, the vacuum comes with a casing which is solely aluminum alloy. Therefore, the body does an excellent job of ensuring sustainability.

It is never interesting to keep on changing a particular product based on durability. To put it simply, you will have this machine for a long time. Also, the vacuum pump is quiet and efficient.

In the majority of cases, particular machines are not as quiet as this one. They make a lot of noise, and that also sucks the joy out of a job. Well, some technicians may claim that the sound is not a problem. However, the long term effect may be irreversible. Loud noise is not always good for your health.

For efficiency in operation, the vacuum pump has an oil window that keeps you informed of the oil level and status. You can change as is necessary to ensure the machine is working effectively. The vacuum pump should always work at optimal levels if it is to remove all impurities in the air conditioning system. The task requires a high level of efficiency, and the right kind of oil plays an important role.

Furthermore, the pump has a bottom drain to let out the dirty oil from the system. There is also a window to help you achieve the right level when replacing the oil.

The pump has a powerful fan to keep everything working efficiently. Sometimes heat can affect the effectiveness of the device. The smooth start engine saves you time, and you can complete the repair works in the shortest time possible.

The ergonomic handle is easy to hold and use even for those with big hands. It makes carrying the device easier and quicker.

Shortcomings

There are several complaints of leaking oil from various customer Zeny vacuum pump reviews.  Also, some other people point out that it has durability issues. It may not last as compared to other competing vacuum pumps on the market.

4. XtremepowerUS 3CFM Air Vacuum Pump

Simplicity is at the heart of efficient products. Towards that goal, this air vacuum pump is quite simple to use. But simplicity is not the only feature that we like.

Features that we find likable in this vacuum pump include the high volume fan. As such, you can be sure that everything remains cool and under control. It produces very low noise that passers-by may not notice you are working inside the garage. That's the beauty of having a reliable and efficient machine.

Furthermore, the aluminum alloy casing gives the machine adequate protection and durability. The air vacuum pump features an oil port for easy filling of the oil.  There’s also an oil drain for removing the waste oil. The spillage meter keeps track of the oil level.

Another thing that you love about this vacuum pump is the included gauge set for diagnosing problems. Other accessories that it comes with include oil bottle, manifold gauge, 36-inch hose and carrying bag. Mainly, the carrying bag is one item that you may not place much importance on but it is critical. Essentially, it makes the 3cfm vacuum pump portable.

Shortcomings

The XtremepowerUS automatic vacuum may not be as effective as other vacuum pumps. Furthermore, various customers have issues regarding the durability of its accessories. Sourcing the accessories may not be so simple after all. It is a challenge.

5. JB Industries DV-6E Eliminator 6 CFM Vacuum Pump

As an All-American brand, JB Industries is well-known for manufacturing high-end HVAC tools, valves, and fittings. Our fifth best vacuum pump belongs to this reliable American brand JB Industries. The DV-6E 6 CFM Vacuum Pump is the best one in the Eliminator series.

It’s one of the most economic units in the industry and a super selection for the ac servicemen. Analyzing a bulk of JB platinum vacuum pump reviews helped us to come to this decision.

The DV-6E JB vacuum pump has a super powerful motor that can produce a maximum of 6 CFM air volume at ½ HP and a maximum of 1725 RPM. This amount of power is sufficient enough to or evacuating in a supermarket’s central ac circuit or an oil separator.

It runs at 115-Volt and is compatible with 110 US standard Volt plug. The ¼-inch x ⅜-inch intake port features thermal overload protection that prevents the motor from being damaged due to overload and overheat.

25-ounce oil capacity ensures long term performance. You can see the oil level as it features a large and easy-to-watch sight glass. It’s protected from oil spilling when you transport it as it features a tethered safety cap. However, there is a little bit of sensitivity to the oil level.

The design of the pump is stylish and ergonomic. You can hold and use the vacuum pretty comfortably; there is an increased amount of space in between the handle and intake tee that gives more space. A complete metal construction (brass fittings included) and chrome plating give a proven strength and durability.

One thing we noticed and didn’t like that, the pump has no isolation valve. Moreover, a very few number of users complained that the bolt-strength is not up to the mark, but think they are not of much concern.

Other than these minor issues, we have found the JB Eliminator DV-6E Vacuum Pump a high-quality, cost-effective, reliable, and responsive vacuum pump. It’s just a symbol of the high-end facility at low-end pricing.

6. Yellow Jacket 93600 Vacuum Pump

There's a good reason the Yellow Jacket HVAC vacuum pump has high ratings among users. Without elaborating too much, every one of us can guess why 1 product becomes a favorite for a group of users. The various reasons are of course not based on negative views but its functionality and quality.

Of course, the need to have quality products is what we can call universal. Everyone appreciates a good product. And that is why it would not be an issue to find your fellow air-conditioning technician with this Yellow Jacket 23600 Vacuum Pump.

The single stage rotary operation of this machine is robust and quite reliable. Its 7 CFM is quite something that will deliver the necessary power to clean the air conditioning system sufficiently. In that regard, you couldn't be happier as a technician that appreciates good work.

And to ensure added efficiency, the yellow jacket vacuum pump oil is available for purchase. It is the most appropriate for this vacuum pump and pretty much enhances its effectiveness.

It has a compact and robust design that is easy to move around. You can take it from one place to the other without so many problems. You will also find the gauge to be clear and easy to read.

At 24 ounces, the oil capacity is among the largest in its class. Therefore, it saves you from the trouble of having to keep on refilling and maintenance. The device is also easy to use. That fact is especially pleasing to beginners and pros alike.

Unlike other standard HVAC vacuum pumps, this one is a little loud. And as such, it may not be the best for people that are averse to loud noises.

7. Robinair 15310 VacuMaster 3 CFM Single Stage Vacuum Pump

As we all know about the brand Robinair, we are not going to give an introduction about the Robinair VacuMaster 15310; instead, we are going to provide a brief Robinair 15310 review, a review about our 6th best pick.

It’s a high-performance vacuum pump coming with one stage rotary vane design, specially designed for refrigeration and air conditioning servicemen. It’s a good fit for other mid-range HVAC services, including mobile markets, small industries, and agricultural constructions.

It has relatively lower capacity than the 5th option JB Industries DV-6E we described above, but performance is so compact. Air displacement capacity is 3 CFM, which is mainly run by a thermally protected 110 V and  1/4 HP powerful motor. Maintain something around 80 microns easily.

8.5-ounce oil capacity lets you get your job done unless it’s much in amount. For instance, if you need to run it continuously for hours, you would need to refill the oil, and refilling is pretty much easy.

Easy-to-see sight glass will give you a clear view of the oil level. The angled position of the oil drain valve located at the bottom of the reservoir makes faster draining. You can remove the oil fill cap anytime, but never miss to check the o-ring.

We experienced no discomfort when using the pump, the handle is pretty strong and comfy, though it’s plastic made. We noticed a continuous 30 minutes vacuum without any significant amount of oil loss.

However, it may mist out the oil occasionally if overfilled or at the time of startup of the vacuum. You may hardly experience any leakage. It’s a super-quiet and quality vacuum pump at an affordable price. Overall, you will get it worth the price.

8. FJC 6912 Vacuum Pump 5 CFM

9. Kozyvacu TA500 5CFM 2-Stage Rotary Vane Vacuum Pump

As a sister concern of the Kozyard LLC, Kozyvacu is well-known for manufacturing high-end vacuum pumps and refrigeration tools & accessories. We took our 9th best product from Kozyvacu. Amongst the available pumps, the Kozyvacu TA500 is one of the best sold yet high-rated. For what it's been so high-rated is described briefly in the following Kozyvacu TA500 review.

It’s a high torque machine, having a 40-micron capacity and 5 CFM air evacuation, which starts easily and runs smoothly. There is no notable complaint about the efficiency of users and experts. We found it efficient too. The thermally protected motor is powerful and gives a long-lasting performance. A housing made of die-cast aluminum makes it lightweight yet durable.

The angled position of the oil drain valve located at the bottom of the reservoir offers faster and complete draining. You can see the oil level as it features a large and easy-to-watch sight glass. You can remove the oil fill cap anytime subject to checking the o-ring. Refilling the oil is as easy as you can expect as the oil filling port can be accessed from both sides- front and back.

While performing, it produces a nominal amount of noise which is completely acceptable. Handling is pretty much comfortable for the non-slip cushion handle. Control is easy as well for the on/off switch on the handle. It’s an ideal pump for high-speed evacuation needs for medium to medium-large projects, for professional audiences, and even for DIY HVAC projects.

10. FJC 6909 Vacuum Pump 3 CFM

Last but not the least “FJC 6909 Vacuum Pump” is a bit different from other options described above. As we’re not going to make the FJC vacuum pump review longer, so it’s better to tell directly about our observation. The distinctive feature that makes it such a unique unit is the Twin Port Technology. For it, the FJC 6909 acts like a 2-stage vacuum pump despite having a single stage only.

The 115-volt motor offers a maximum of 3 CFM air evacuation, which is good enough for indoor use and medium-level industrial use. Filling oil is as easy and quick as it can be. We didn’t notice it producing much noise.

You may have to get a separate gauge set as the pump doesn’t have any gauge set in it. Structurally, it’s a beautiful piece of machine that has proven durability. Price is pretty much low compared to its similar capacity competitors.

Benefits of HVAC Vacuum Pump

Vacuum pumps come up with an abundance of benefits and uses. Primarily, these pumps are used by professionals for HVAC purposes. But it is not like you’ve to wait with a vacuum pump in your garage for breaking down the AC. You can still use it for different purposes, as different people do.

For instance, a scientist can use it for particular laboratory works, or you can use it for your automobile to keep the oil cleaner and boost up horsepower. People also use those for some small appliances, or water and sewerage lines.

Vacuum pumps are easy to start and maintain. You can control the moisture of your AC and appliances quickly. They help to prevent the development of contaminants and keep the system efficient. Some of them are quite portable, and you can use them wherever necessary.

Types of Vacuum Pumps

While categorizing, experts put hvac vacuum pumps mainly into three types - oil filled rotary vane pump, diagram pump, and vacuum generator. They are differentiated based on how their internal mechanisms work and how they vacuum. 

• Diaphragm Pump –  Among the three, this type of pump is probably the less efficient model that comes with around 85% of vacuuming strength and success. However, they are still in use for some reasons. Interestingly, these pumps are no less expensive! 
  
  
• Vacuum Generator - This type is capable of creating a stronger vacuum flow measuring 93%, placing it at the second priority position when it comes to choosing a type. They will meet most demands that a hvac professional can expect. But we dislike their noise, as they can be incredibly noisy sometimes. If you choose it, you perhaps need to buy another air compressor too for sound controlling. And, be cautious while using in humid conditions, as they perform less efficiently in such conditions.
  
  
• Oil Filled Rotary Vane - Being the most portable and efficient type of vacuum pump, with a rate of more than 99% strong vacuum, this is the first choice of hvac technicians. DIY people do also prefer the oil filled rotary vane vacuum pumps because of the ease-to-use mechanisms and affordable price tags. But you have to ensure regular oil change, although this is inconvenient.

What Happens if You Don't Vacuum Your AC System?

Suddenly you may notice that your room is not getting cold. You just have called a technician and asked him to fill your AC with sufficient refrigerant, but it is still not enough cold! What kind of problem is it, and what should be the solution? The basics of AC tells that there is the existence of humidity or moisture inside the compressor, which is preventing the system from making airflow blocked and emitting fresh and cold air. The technician should have vacuumed the system with a powerful pump before refilling it with gas. 

How to Choose an HVAC Vacuum Pump?

If you are an HVAC professional, you must know what to look for while picking a vacuum pump. But problems arise when it comes to a person with no knowledge of it or a DIY person having minimal or vague information about vacuum pumps, who is trying to find out the right pump for his necessity. Let's come to scroll down the most vital things that you should consider before deciding for your vacuum pump:

The first thing you should look at before buying a vacuum pump is its CFM rating, indicating the amount of air drawn by the pump per minute. The higher the CFM, the quicker the contamination evacuation - that means you should buy a high CFM pump to get better results, despite their higher costs. However, experts have a set range of CFM for different purposes, for instance, 4 to 6 CFM for residential uses, 8 to 10 CFM for commercial uses, etc.

Checking the level that a vacuum can achieve is also essential. Micron is the unit based on what the level of vacuum is measured. 0 micron indicates the perfect vacuum that a pump can achieve at its best, while 760000-micron is the average vacuum level for space (sea level) where no vacuum is available. That means the lower the microns, the better the pump.

Usually, the HVAC vacuum pump oil becomes obsolete over time. Therefore, you should change the oil regularly. But you might find the task tough because of not having an appropriate oil drainage system in your pump. Rotational parts inside the device may start reacting crazily, and they may even end up with an operational failure. It will be better, while buying a pump, to select a model that has a bigger oil drainage valve, regardless of using for personal or commercial purposes. The opening of the drain should be located angularly at the bottom.

Another feature you must not forget to check if the pump has sight glass. It will allow you to monitor the oil level inside the reservoir constantly. But make sure the glass is not a type that tends to be tinted or foggy.

We could not yet tell about one of the essential features - the anti-suck back mechanism. The power might be lost while evacuating, and the pump oil may start escaping! You perhaps won’t like to let the oil be drawn back to the refrigeration system. Only an anti-stuck back feature can prevent this from occurring in any case.

A two-Stage vacuum pump or One-Stage vacuum pump should be, of course, one of your primary concerns. With two sets of vanes and two sets of rotors, a two-stage pump will offer you a faster and quieter operation than that of a one-stage pump.

How Long Can You Run a Vacuum Pump?

Generally, a vacuum pump can run for about 12 hours to 48 hours continuously, having said that it can evacuate around 500 microns of contaminant air without any risk in such a case. If you notice it hanging around 15-inch, check if there is any leak. For the constant running of a vacuum pump, it is essential to look at the oil condition, especially color. If it appears white in your eyes, it is time to replace the oil before you start cleaning for a long session. 

Why Doesn’t My HVAC Vacuum Pump Reach its Max Levels?

Among several other reasons, the primary issue that may prevent your vacuum from reaching its maximum level is air leakage. Observe to find out if it is an actual leakage into the vacuum chamber that occurred by an external source or a virtual leakage originated from the gas load inside the pump system. Whether you can find the leakage or not, we suggest you get help from an expert.