Dental Vacuum System Buying Guide: How to Choose the Right Vacuum for Your Practice
A dental vacuum is one of those pieces of equipment you may not think about much—until it stops working.
When it's time to replace an existing vacuum or select one for a new dental practice, it can be tempting to compare horsepower, maximum users and price. Those specifications matter, but they don't tell the whole story.
The right dental vacuum system depends on how your practice actually works: the number of operatories, how many doctors and hygienists use suction at the same time, the type of dentistry you perform, your existing plumbing and mechanical-room space, and whether you expect the practice to grow.
At North Star Dental Services, those are the questions we start with before recommending a vacuum.
Quick Answer: What Type of Dental Vacuum Is Best?
For many dental practices, a modern dry dental vacuum is a strong choice because it eliminates the water consumption used to create vacuum and newer systems can adjust output based on demand.
But dry isn't automatically right for every office.
The best dental vacuum depends on simultaneous users, procedures performed, existing plumbing, mechanical-room space, future expansion and service support. A wet vacuum can still make sense in some installations, particularly where space is extremely limited.
Practices using nitrous oxide or performing sedation or surgical procedures may also have additional vacuum and scavenging requirements that need to be considered before equipment is selected.
Start With Your Practice, Not the Vacuum
Before comparing dental vacuum models, we want to know:
- How many operatories do you have?
- How many doctors and hygienists may use suction at the same time?
- What vacuum system do you currently have?
- How much mechanical-room space is available?
- Are you replacing an existing system or building/remodeling?
- Do you expect to add operatories in the future?
- Do you perform oral surgery, use nitrous oxide or provide sedation?
A vacuum rated for a certain number of “users” isn't automatically the right vacuum for every practice with that number of chairs.
North Star Technician's Note: We size around the way the practice operates, not simply the number of operatories on the floor plan.
Wet vs. Dry Dental Vacuum Systems
One of the first decisions is whether to choose a wet dental vacuum or a dry dental vacuum.
Wet Dental Vacuum Systems
Wet, or liquid-ring, dental vacuums use water in creating vacuum. They are proven systems and can still be a practical choice in certain applications.
One of their advantages can be physical size. In an extremely tight mechanical room, a wet vacuum may fit an installation where a particular dry system will not.
The major tradeoff is water consumption. With a wet vacuum, the practice pays for the electricity to operate the equipment as well as the water and sewer associated with its operation.
Wet vacuum technology is still available from dental-equipment manufacturers, including current liquid-ring systems from Tech West.
Dry Dental Vacuum Systems
When the mechanical room and existing infrastructure allow it, North Star generally prefers a dry vacuum system.
Dry systems don't consume water to create vacuum, eliminating that ongoing water use. Many newer systems also use controls that increase or decrease output as demand changes rather than simply operating at maximum output continuously.
That can make a modern dry dental vacuum attractive for both water conservation and energy management.
North Star's Take: If the installation allows it, we generally lean toward dry vacuum technology. But existing plumbing, available space, electrical requirements, procedures performed and future plans all matter.
Can You Replace a Wet Dental Vacuum With a Dry Vacuum?
Often, yes.
North Star regularly evaluates offices with older wet systems for conversion to dry vacuum. But it isn't always as simple as disconnecting one machine and connecting another.
Existing vacuum-line size and configuration, electrical service, available space, drain and exhaust requirements all need to be considered. Some dry-vacuum designs are also better suited than others to particular existing plumbing arrangements.
Don't order the replacement until someone has looked at what you're connecting it to.
A vacuum that works beautifully in a new mechanical room may not be the best choice for an older office with different infrastructure.
How Do You Size a Dental Vacuum?
Dental vacuum sizing should consider more than the number of operatories.
The more important question is how many people may actually be using suction at the same time.
A six-operatory practice with one doctor and one hygienist can have different demands than a six-operatory practice with multiple doctors and hygienists working simultaneously.
Future growth matters, too. If you're planning to add operatories or providers, that should be part of the conversation before the vacuum is selected.
But there is another distinction that's easy to miss:
Capacity and Redundancy Are Not the Same Thing
Capacity means the vacuum can support the practice's expected number of simultaneous users.
Redundancy means the practice may be able to continue operating if part of the vacuum system fails.
Those are not the same thing.
Simply buying a larger-capacity vacuum does not necessarily create redundancy. Redundancy comes from the way the system is configured—such as multiple independent heads, blowers or units.
Some dental vacuum systems can be configured this way, allowing part of the system to continue producing vacuum if another component is temporarily out of service.
Why North Star Thinks About Redundancy
We worked with an office that had previously experienced a vacuum failure. When its wet vacuum was replaced with a dry system, we configured the new setup with an additional blower.
Later, one blower failed.
The backup kept the practice operating while the failed equipment was repaired. Once repaired, it was reinstalled.
The office didn't lose a clinical day.
For some practices, that's worth considering when designing the mechanical room. The cost of additional equipment may be considerably less than the cost of unexpectedly losing a full day of patient care.
North Star Technician's Note: More capacity isn't necessarily redundancy. If keeping the practice operational during an equipment failure is important, ask how the system is configured—not just how many users it's rated for.
Your Mechanical Room Matters
A dental vacuum doesn't operate in isolation. The room around it matters.
One problem North Star technicians encounter regularly is a mechanical room that is too small or poorly ventilated.
Vacuum systems generate heat, and that heat needs somewhere to go. Excessive heat can affect equipment longevity.
NFPA 99 addresses ventilation for dental vacuum equipment, and individual manufacturers also specify installation and ventilation requirements for their systems.
Before selecting a dental vacuum, consider:
Space: Will the equipment fit while still remaining accessible for maintenance and repair?
Ventilation: Can the room adequately remove the heat generated by the equipment?
Electrical: Does the existing electrical service meet the requirements of the new system?
Vacuum piping: Are the existing lines appropriately sized and configured?
Drain and exhaust: What does the particular system require?
The best vacuum on paper can become the wrong vacuum if the building can't properly support it.
Oral Surgery, Nitrous Oxide and Sedation Require Additional Planning
If your practice performs oral surgery, uses nitrous oxide or provides sedation, tell your equipment provider before the vacuum system is selected.
Oral surgery can create greater vacuum demand, while nitrous oxide scavenging introduces additional airflow and system requirements.
NFPA 99 contains specific requirements related to dental vacuum, nitrous oxide scavenging and waste anesthetic gas disposal (WAGD). Equipment suitability, system design, exhaust, capacity and—in applicable WAGD systems—materials, lubricants and sealants can all matter.
Nitrous oxide scavenging also adds demand to the vacuum system and needs to be accounted for when the equipment is sized.
North Star Technician's Note: Don't select a vacuum for a surgical or sedation environment based on suction capacity alone. Tell your equipment provider exactly how nitrous oxide and anesthetic gases are being used so the complete system can be evaluated appropriately.
Poor Suction Doesn't Always Mean You Need a New Vacuum
If your complaint is simply “our suction isn't as good as it used to be,” don't assume the vacuum itself needs replacement.
Before recommending new equipment, North Star may check for:
- clogged or restricted vacuum lines
- leaks
- traps and filters
- plumbing problems
- improper cleaners or excessive foaming
- problems at individual operatories
- actual vacuum performance at the equipment
Vacuum lines can also accumulate material over time. Routine cleaning is important, and significantly restricted lines may require professional jetting.
Installing a larger vacuum doesn't fix a restricted vacuum line.
Diagnosing the system first may prevent an unnecessary equipment purchase—or reveal a problem that would still exist after a new vacuum was installed.
How Much Maintenance Does a Dry Dental Vacuum Need?
Dry doesn't mean maintenance-free.
Modern dry vacuum equipment can require relatively little machine maintenance compared with some older technologies, but the evacuation system still needs attention.
Depending on the equipment, filters should be inspected periodically. North Star generally recommends checking applicable filters at least annually. Inspection doesn't necessarily mean the filter needs to be replaced every year.
Vacuum lines also need regular cleaning according to the equipment and evacuation-system requirements.
Some inspections can be performed by office staff. Having a dental equipment technician periodically inspect the mechanical-room equipment also provides an opportunity to spot developing issues before they cause downtime.
How to Compare Dental Vacuum Systems and Manufacturers
North Star works with new dental vacuum systems from Tech West, Cattani, Solmetex, BaseVac, Vector and ADS, in addition to servicing other equipment commonly found in dental practices.
We don't believe one manufacturer is automatically right for every office.
Different systems offer different combinations of:
- footprint
- capacity
- multi-head or modular configurations
- energy management
- noise
- plumbing requirements
- maintenance
- warranty
- parts availability
- serviceability
- purchase price
Why North Star Often Recommends Tech West
North Star frequently works with Tech West dry vacuum systems because we've found them to be reliable, relatively quiet and reasonably priced.
From a service perspective, we also value the manufacturer's warranty support, technical support, readily available parts and quick shipping. The systems are straightforward for our technicians to work on, and their configurations can make it easier to build redundancy into some mechanical rooms.
That's important to us because we're thinking about what happens after the equipment is installed, not just what happens on purchase day.
That doesn't mean Tech West is the right choice for every practice. Space, infrastructure, specialty requirements, capacity and the desired system configuration can lead us to recommend something else.
What About RAMVAC Dental Vacuums?
RAMVAC systems are common in dental practices, and North Star services them even though we are not a RAMVAC dealer.
One of their strengths is longevity.
In our field experience, properly maintained RAMVAC systems can remain in service for decades. When they do fail, the problem may be relatively straightforward, such as a belt.
Older oil-lubricated systems can be messier to service, particularly when oil leaks develop, and some components can be difficult to access depending on the installation.
But we wouldn't recommend replacing an otherwise serviceable RAMVAC simply because it's old.
If you're specifically deciding between these systems, see our Tech West EcoVac vs. RAMVAC: Which Dental Vacuum Is Right for Your Practice? comparison.
Should You Buy a Pre-Owned Dental Vacuum?
A good pre-owned dental vacuum can be an excellent value, but North Star evaluates used vacuum equipment differently depending on its technology, manufacturer, condition and history.
Things we consider include:
Age and technology: We would generally be cautious about purchasing a dry vacuum system more than roughly 10 years old.
Condition: Actual mechanical condition matters more than simply looking at the manufacture date.
Service history: An unknown history increases risk.
Parts availability: An inexpensive vacuum isn't a good value if an important replacement part is obsolete.
Capacity: Used equipment still needs to be properly sized for the practice.
Manufacturer and design: Different systems age differently. For example, North Star may still consider a 15- or 20-year-old RAMVAC if it is operating properly and doesn't have significant oil leaks.
Oil itself doesn't automatically disqualify a serviceable system; oil can be replaced as part of appropriate maintenance. The overall condition of the machine is what matters.
A used vacuum should be evaluated as a piece of equipment, not simply by the year on its data plate.
Don't Buy a Dental Vacuum Based on Price Alone
One situation our technicians encounter starts with:
“I found a vacuum online. Can you install it?”
Sometimes the system turns out to be undersized for the practice.
Sometimes there's a reason it was dramatically cheaper than established dental vacuum equipment.
We've seen inexpensive systems require replacement after only about five years.
The initial purchase price matters, but so do expected equipment life, parts availability, warranty support, serviceability and the financial cost of downtime.
Before ordering a vacuum online, make sure someone has evaluated whether it actually fits your practice and your building.
Dental Vacuum System Buying Checklist
Before choosing a dental vacuum, make sure you know:
- Your current and future number of operatories.
- The maximum number of simultaneous users.
- The number of doctors and hygienists working at the same time.
- The types of procedures being performed.
- Whether nitrous oxide, sedation or surgical procedures introduce additional requirements.
- Your existing vacuum type and plumbing configuration.
- Available mechanical-room space and ventilation.
- Electrical, drain and exhaust requirements.
- Whether redundancy is important to your practice.
- Who will service the equipment and whether replacement parts are readily available.
- Whether poor suction has been properly diagnosed before assuming replacement is necessary.
Dental Vacuum System FAQs
Is a dry dental vacuum better than a wet dental vacuum?
For many practices, North Star prefers a dry dental vacuum when the installation allows it because dry systems don't consume water to create vacuum and modern systems can offer demand-based energy management. Wet vacuum systems can still make sense, particularly when mechanical-room space is extremely limited.
How do I know what size dental vacuum I need?
Don't size a dental vacuum by operatory count alone. Consider the number of simultaneous users, doctors and hygienists, procedures performed, existing plumbing and future expansion.
Can I replace a wet dental vacuum with a dry vacuum?
Often, yes. Existing piping, electrical service, mechanical-room space, drain and exhaust requirements should be evaluated before selecting the replacement. Some dry vacuum designs may be better suited to an existing installation than others.
Does a bigger dental vacuum give me redundancy?
Not necessarily. Capacity and redundancy are different. A larger system may support more simultaneous users without providing backup if its vacuum-producing component fails. Redundancy depends on how the system is configured, such as using multiple heads, blowers or units.
How long does a dental vacuum last?
There isn't one useful lifespan for every dental vacuum. Manufacturer, technology, maintenance, operating conditions, parts availability and service history all affect longevity. North Star has serviced well-maintained vacuum systems that have remained operational for decades.
Should I buy a used dental vacuum?
A properly sized, serviceable pre-owned dental vacuum with available replacement parts can be a good value. Condition, technology and service history are more important than simply buying the newest machine available.
Do I need a new vacuum if my office has poor suction?
Not necessarily. Restricted lines, leaks, traps, filters, plumbing issues and problems at individual operatories can all reduce suction. Diagnose the existing system before assuming the vacuum needs to be replaced.
How North Star Helps You Choose
A dental vacuum isn't just another box in the mechanical room. When it stops, much of the practice can stop with it.
North Star Dental Services helps practices evaluate the whole system—current equipment, plumbing, mechanical-room space, clinical demand, future growth, serviceability and the consequences of downtime—before recommending equipment.
We work with multiple vacuum manufacturers because the right answer isn't always the same machine.
Ready to compare equipment? Browse our dental vacuum systems.
We can also help practices outside our immediate service area understand their equipment options. For new equipment, we generally limit sales to areas where we can provide the level of support we believe the equipment deserves. Pre-owned equipment availability and service areas may vary.
Need help choosing a dental vacuum system? Contact North Star Dental Services to discuss your current equipment, practice needs and mechanical-room setup.