Some links in this post are affiliate links. This means if you buy something through our posts, we may get a small share of the sale at no additional cost to you. As an Amazon Associate we earn from qualifying purchases. Click here to learn more.
Scuba Diving is a fun adventure sport that connects you to the underwater world like no other sport can, and it requires the proper diving gear to keep you safe and comfortable while exploring. The best scuba regulators serve as a means for reducing pressurized gas in the diver’s air tank into ambient pressure that can be delivered to the diver’s mouth. This crucial piece of gear allows divers to breathe from a tank of compressed and high pressurized air, making adventuring in the deep blue possible.
When you’re shopping for a diving regulator, it’s essential to choose a product that’s durable, reliable and user-friendly. However, with a high number of products available on the market in varying degrees of efficiency, the process of choosing the best regulator for scuba diving can be overwhelming. But we’re here to help!
Here is the Seaside Planet guide to the 5 best products available, and a simple buyer’s guide to help you choose which is best for your next adventure:
Best Scuba Regulator Reviewed
1. Scubapro MK25/A700 Regulator
The Scubapro MK25 regulator is well known and highly rated for its extreme reliability while diving. This device is made of heavy-duty titanium components and suited for both recreational divers and technical divers, making it a great option for someone looking to advance in their diving skill set. Designed for use in cold water and extreme conditions, this regulator features an external thermal insulation system for maximum performance in a variety of adventure types. This addition also prevents freezing, adding an additional layer of protection to cold water dives.
The Scubapro is a higher end cost regulator, however the quality of design and construction, and the features offered makes this our top choice. This regulator features a superior piston-based airflow system, which ensures quality performance in all temperature conditions, and that it’s constructed to provide effortless performance. Additionally, this device features an air balanced piston regulator with an environmental seal, and it’s designed with two high pressure and five low pressure ports on a swivel turret. As an added bonus, the hose routing is adjustable to both the left or the right side attachments to make sure it suits your diving needs.
2. Aqua Lung Calypso QC Regulator
The Aqua Lung Calypso regulator is a compact and lightweight product that is manufactured by a well-known and reliable brand, which has over 70 years of experience. This regulator is a budget friendly, yet high quality regulator that is ideal for beginner divers and those novice to this fun underwater sport. The compact design makes maintaining and cleaning the regulator very manageable, and keeps the device portable and hassle-free. Featuring an unbalanced piston, this is a first stage and a second stage regulator designed with two high pressure and five low pressure ports. Additionally, the environmental seal protect against corrosion and contaminants which is great for use over time on adventures.The removable Comfo Bite mouthpiece on this regulator is designed to reduce jaw fatigue, keeping you more comfortable throughout your underwater adventure. For additional comfort and durability, the quality materials and superior design make this product one that’s meant to be used on many scuba diving trips to come. It’s stated to have been designed for performance, reliability and easy maintenance, and the reviews report just that. To ensure worry-free purchasing, this regulator comes with a limited three-year warranty to protect your investment.
3. Hollis 200LX DCX Regulator
The 200LX is described by Hollis as it’s “flagship regulator” that is “designed for extreme conditions.” Hollis is a company with over 40 years of designing and manufacturing life support systems, with high customer reviews and ratings to back the products. The lifetime warranty offered on this regulator backs up Hollis’ claim that it will outperform and outlast other regulators, and provides you worry-free purchasing and insurance for future dives. Featuring a balanced diaphragm regulator with an environmental seal, this regulator is designed for reliable performance and to keep contaminants and corrosion out.
The two high pressure and six low pressure ports are angled and allow for multiple configurations depending on your preference. The lightweight and durable design is flexible, and combined with the orthodontic mouthpiece this regulator truly is made for comfort. Additionally, this product features an adjustable right or left hand hose configuration to ensure it fits your needs while exploring underwater.
4. Apeks MTX-R Regulator
The Apeks MTX-R regulator has a unique over-balanced diaphragm design which is designed for reliable performance while exploring underwater. This specialized design supports superior performance at any depth and is engineered for diving in cold water conditions. Apeks states that the MTX regulator was developed in accordance with the United States Navy Experimental Dive Unit requirements, ensuring it meets your safety needs for the scuba diving adventure. The MTX features a balanced diaphragm regulator, with an environmental seal to provide a reliable function and performance, and to keep corrosion to a minimum and contaminants out.The well-angled ports on this device, two high pressure and five low pressure, allow for multiple configuration depending on your needs while diving. The demand valve is reversible, allowing for both a left and right configuration. Made of lightweight, durable and flexible materials, this regulator is designed for comfort underwater. Additionally, the Comfo Bite mouthpiece helps to prevent jaw fatigue and discomfort throughout the length of your dive. To ensure worry-free investing, this product comes with a lifetime warranty and free parts for life.
5. Mares Abyss 22 Navy II Regulator
The Mares Abyss 22 is a compact, lightweight and a high performing regulator for your scuba diving needs. The regulator is constructed using a durable and lightweight polyurethane on inner brass that protects the inner components for corrosion and contaminants. The Mares is designed for use in extreme conditions and utilizes a patented Tri-material valve technology for reliable function underwater. Additionally, this regulator features a balanced diaphragm with an environmental seal.This regulator is designed with two high pressure and four low pressure ports, along with additional built in features for high quality performance while scuba diving. The Vortec assisted design makes breathing in deep water easier, and it’s constructed for use in cold water and extreme conditions, making it the perfect piece of gear for a variety of dive sites around the world.
Choosing a Regulator for Scuba Diving: Buyers Guide
When you begin your search for the best scuba regulator, understanding the regulators parts, features and capabilities will be essential to ensure you’re purchasing equipment that will satisfy your personal needs. A variety of factors will impact your final choice including how often you’ll be diving, the type of diving you’ll be doing, where you’ll be diving, the environment you’ll be diving in and even your personal taste and preferences.
The following information covers the essential components, features and factors you will need to consider during your search for the right scuba regulator for you personally. A quick point of emphasis, is that you should keep in mind that the best regulator for one individual is not necessarily the best regulator for another person.
Understanding a dive regulator’s components and the capabilities of each part will be important in getting the best equipment for you. The foundation of a regulator consists of a first stage and second stage. Additional components are necessary to complete the air delivery system.
Two Stage Regulator: The purpose of the two stage regulator is to reduce the high pressure of the air tank to deliver air to the diver’s lungs at ambient pressure, so the diver can breathe at any depth. The first stage regulates air pressure as it leaves the air tank, prior to entering the air hose. The second stage consists of the mouthpiece and purge valve, which delivers air to the diver and removes unwanted or excess air or materials.
First Stage Features:
This component of the regulator attaches to the air tank. Air pressure in the tank is approximately 3,000 PSI. The first stage serves as a means to lower the tank pressure and pass it along to the second stage. The first stage is attached to the air tank using either a DIN (Deutsche Industrie Norm) or a Yoke connection.
- DIN Connection - A DIN is generally considered a safer connection compared to a Yoke, due to the fact it is secured by screwing it into the tank valve, so it does not protrude. The DIN has less bulk, a tighter seal, and handles higher pressures, resulting in the majority of divers viewing it as a superior system to theYoke.
- Yoke Connection - The Yoke fits over the tank valve and is secured using a screw clamp.
- Environmental Seals - All dive regulators will operate in warm waters (water temperatures above 50 degrees fahrenheit/10 degrees celsius). When compressed gas is cooled it will expand, which can cause regulators without environment seals to freeze open in water temperatures below 50 degrees fahrenheit. The environmental seals prevent materials and cool water from entering the first stage, to reduce the potential of freezing.
- Unbalanced or Balanced - An unbalanced regulator is the most basic design, least expensive and typically found on recreational and/or rental equipment. It operates based on the tank pressure and will result in some modest resistance taking in air as the tank pressure drops. A balanced regulator is a little more costly but is found in the large majority of regulators beyond the most basic ones. Balanced regulators are not impacted by decreasing tank pressure, delivering a more consistent and even air pull throughout a dive.
- Piston or Diaphragm - Piston regulators have a very basic design, utilizing a hollow metal piston, as opposed to a metal spring. There are less moving parts and a modest edge in performance at greater depths. Diaphragm regulators are a more complex design with the diaphragm functioning as its own environmental seal. This design is better for deep, cold water dives as the internal parts are not exposed to the water.
- Ports - All dive regulators have a minimum of at least one high pressure port with most having multiple ports (low or medium pressure) for the purposes of having an additional pressure gauge or air integrated computer providing increased flexibility configuring your regulator.
Second Stage Features:
The second stage is connected to the first stage by a hose. This component of the dive regulator is the portion that is inserted into the divers mouth. It consists of a mouthpiece, exhaust valve and an emergency purge valve. When the diver exhales the exhaust valve allows the air to escape into the water. The purge valve, when pressed, forces air to flow uninterrupted into the second stage chamber forcing any existing water out the mouthpiece through the exhaust valve.
- Unbalanced or Balanced - Unbalanced regulators are operated utilizing tank pressure, resulting in a modest resistantance for air intake when tank pressure drops. Balanced second stage regulators reduce the minimum pressure required for the regulator to function and reduce the pull to take in a breath when tank pressure decreases.
- Dive/Predive Control - On the second stage regulator there is a control switch labeled with either a Dive/Predive, On/Off or a +/-, which controls air flow making breathing easier or more difficult. Some regulators are designed to take advantage of what is referred to as the Venturi Effect. Liveabout.com describes Venturi Effect as, “when air is forced through a constriction, such as the tiny valves inside a regulator second stage, the speed at which the air particles travel will increase. When air exits the constriction, it is moving very rapidly in comparison to the surrounding air particles.” Regulators that take advantage of the Venturi Effect have this switch that either enables or disables this effect.
- Nitrox - Nitrox is an enriched air that mixes nitrogen and oxygen. The benefits of using nitrox are: longer bottom times, longer dive times, less fatigue and surface time to remove nitrogen from your body. There are risks including not being suitable for dives over 100 feet and the potential for oxygen toxicity. If you choose to use nitrox, you should seek out specialized training for its use.
- Hoses - The design and materials hoses are constructed from varies. For ease of use and transporting, as well as durability the type of hoses used with your regulator should be given serious consideration. Hoses have been designed to be lighter, more flexible and user friendly making transporting and routing hoses much more manageable and help to reduce jaw fatigue. Additionally, utilizing swivel hose connectors enhances these benefits.
Factors to Consider
When you start your research to find the best scuba regulator, you’re likely to get various recommendations based on who you seek advice from; the regulator you choose should be greatly impacted by the environment you’re going to dive in and what is most practical for this type of diving. There are some additional factors or considerations that you should explore before making your choice:
- Choosing a Regulator Mouthpiece: Your comfort while diving should, especially as it relates to your regulator mouthpiece be an important consideration. The mouthpiece comfort impacts the enjoyment of your dive, as well as potentially impacting how much air you consume. If you’ve ever experienced jaw fatigue you’ll understand the importance of having a good fitting mouthpiece.
- Number of Ports: We covered ports previously but feel it’s worth mentioning again, as it can be easily overlooked and potentially later causing some regret. First stage regulators all come with at least a single high pressure port. It is worth considering choosing a regulator with a minimum of two ports. In doing so, it provides you with the ability to incorporate a dive computer, as well as an air and depth gauge.
- Try It Out: Whenever possible, we recommend trying out any significant purchase before making a final decision. This will allow you to identify regulators you may want to look into further or ones that you can take off your list. It also gives you some experience with specific designs and features that help to better inform you. Find a friend who will let you try out their regulator or go to a dealer or retail store that has demo models for you to try.
- Reviews: Another step is to check out the reviews online. You’ve taken a good step by reading this article to gather information. Additionally, ask other divers, do your research at local dive shops and check the models used at local rental shops. Every little bit of information can help.
- Regulator Cost: This should not be your primary consideration, as you need to find the right regulator for you. Humans cannot breathe underwater. This makes getting the best regulator for your needs pretty high on the priority list. The cost of a regulator can range from a couple hundred dollars to over $1,200. Typically, the more you spend the better quality and the more you get in a regulator. However, there are quality regulators that can be purchased at a very reasonable price. Just do your due diligence then consider the cost as a factor in your final decision.
- Environmental Conditions and Water Temperature: If you intend to dive in waters that are colder than 50 degree Fahrenheit, you will need to get a regulator that has an environmental seal to avoid having the first stage from freezing up. You may also want to consider a metal second stage versus a plastic one, due to metal having greater thermal conductivity. If you are going to be diving in only warm water (above 50 degrees Fahrenheit) any regulator will be appropriate.
- Regulator Weight: Although not high on the list of considerations, if you are traveling and transporting your equipment a significant amount of the times, the weight of each component will become an issue.
- Adjustable Air Flow: If you are intending to extend your diving experiences to more challenging and difficult conditions you will want to consider a regulator that provides for adjusting the amount of airflow. Regulators with adjustable airflow provide you the ability to access additional air in stressful conditions, reducing fatigue, or conserve air in less demanding conditions.
Frequently Asked Questions
What do I need to do to maintain my regulator?
The importance of maintaining your regulator cannot be overstated, as it is your lifeline while underwater. Fortunately, it is a pretty straightforward process:
- Completely dry and replace the dust cap;
- Soak regulator and rinse with clean, fresh water;
- While soaking, work all the levers with the exception of the purge button;
- Run a stream of water through first and second stages;
- Dry thoroughly before storing (out of direct sunlight);
- And store in a dry and controlled temperature environment out of direct sunlight.
When should I have my regulator serviced?
If during your dive or during your pre or post inspections of your equipment you notice something isn’t working properly or you observe any wear or deterioration, you should have your regulator serviced.
As a standard part of maintaining your regulator, some will debate the necessity of having the manufacturer conduct a certified inspection and maintenance service. Again, it’s important to be conscious of the fact that this piece of equipment provides you with your only access to air while you are underwater. An extra measure to ensure your regulator is operating as it is intended may be a wise step. Additionally, you will want to review and consider annual maintenance as it may be required by the manufacturer's warranty.
What are the main causes of divers running low or out of air?
Instances where divers run low on or out of air are generally the result of poor air management techniques, becoming distracted or some sort of mechanical failure. Divers need to establish a routine for monitoring their air supply to avoid a low air situation. Additionally, their dive plan should ensure the necessary air supply and reserve for the conditions and environment they will be diving in. A predive inspection should also be part of any dive routine. Another consideration is to carry a secondary air supply.
Guide your search with your primary consideration being the environment and water conditions in which you plan to dive. If you intend to dive exclusively in warm tropical waters, all the regulators on the market will be suitable. However, if your plan is to dive under more extreme conditions, in cold and deep water, you will need to purchase a regulator designed for these environments.
Cost is obviously a factor. Choose wisely and remember a regulator is one of the most critical components for your enjoyment and safety while diving. Based on your research, purchasing the best regulator you can afford will pay dividends and is a wise decision. Just remember, there are reasonably priced regulators that will provide you with a high quality component. Making a smart decision on the front end can save you money in the long run, ensure your safety and add to the enjoyment of your diving experiences.
Best of luck on your next dive adventure! We would love to hear which regulator you decided to go with- share it with us in the comment section below.
For more of our top scuba diving gear recommendations, please visit the following articles.
Megan Jones leads the editorial staff of Seaside Planet. They are a multidisciplinary team of outdoor adventurers, water sports lovers, and passionate beach goers. You can learn more about Meg and the rest of the editorial team here.