Updated October 26, 2022
When diving in cold water you need to make adaptations so that not only your body can resist it effectively by wearing exposure protection, but also your other equipment needs adaptation appropriate for the challenge, especially your regulator. Regulators are susceptible to freezing and free flow in cold water and can be produced to avoid these dangerous situations with special designs and more robust materials.
Below is a buying guide with factors and special features to consider when choosing a regulator for cold-water diving.
After that is the list of the best cold-water regulators followed by individual reviews and a comparison table.
If you have any questions or concerns, please use the comments section at the bottom. I’d love to know your thoughts.
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Things to Consider in Choosing the Best Cold Water Regulator
Cold versus Warm Water
How warm is the water where you plan to dive? This will determine whether a sealed or unsealed regulator first stage is the suitable choice.
- Unsealed Regulators – An unsealed regulator is one that is open such that water can flow into the first stage. This is acceptable for warm water diving. Unsealed models also tend to be less expensive than sealed models.
- Sealed Regulators – When the water temperature is much lower than 24°C (75°F), you need a sealed regulator. This is because freezing water inside the first stage can block airflow. An environmental seal also has the benefit of keeping sediments, salt, or other contaminants out as well.
Diaphragm or Piston
There are two basic structural designs for first-stage regulators, diaphragm or piston. For basic recreational diving, both are okay. With fewer moving parts, piston first stages are considered more reliable by many divers. Deep divers tend to prefer them. Both designs, however, are well tested and there are top-rated high-performance regulators of both designs.
Balanced or Unbalanced
Regardless of your depth or how much air is left in the tank, a balanced regulator will have consistent airflow. With an unbalanced regulator, it will become harder to breathe the deeper you go and as the air supply is depleted. This is most noticeable on deep dives. Many of the unbalanced models are very easy to maintain and reliable, as well as cheaper, so dive shops often use them as rental gear when deep diving is not planned.
DIN or Yoke
- DIN Valve – The DIN system which is common in Europe and with Europeans involves screwing the regulator first stage directly into the tank valve for a reliable, strong seal that is also more streamlined. Technical and cold water divers prefer the security of the connection afforded.
- Yoke Valve – The yoke system is prevalent in North America and where Americans dive. This is the method where the regulator is mounted over and around the tank valve using a yoke or A-clamp to make the connection with an O-Ring completing the seal.
- If you do decide to go with a DIN system, you can get a DIN to yoke adapter that will allow you to use a DIN regulator on a yoke valve.
Number of Ports
In recreational diving, the standard regulator setup has a primary second stage, a backup octopus, a BC inflator hose, and a high-pressure gauge. Accommodating this set up most regulator first stages come with 1 or 2 high-pressure (HP) ports and 4 low-pressure (LP) ports. 2 HP ports are handy if you are using an air-integrated dive computer with a transmitter that will need an HP port to attach to. Generally, the more ports you have, the more options available for comfortably setting up, which is especially important for technical diving.
Diver Adjustable
There are several features that some of the higher-end regulators employ to help you customize your breathing or avoid free flows. For cold water use, you will be using gloves so it is important to select adjustment mechanisms that are easy to grip and manipulate.
- An Inhalation Adjustment Knob allows you to increase or decrease breathing resistance by turning a knob on the second stage.
- A Venturi Switch adjusts a Venturi inside the second stage which can enhance ease of breathing underwater and help prevent free flows on the surface.
- A Pre-Dive Switch on the second stage can be used on the surface prior to descent that precludes free flow.
Best Cold Water Regulators
- Scubapro MK25 Evo A700
- Atomic Aquatics M1
- Aqua Lung Legend LX Supreme
- Apex MTX-R
- Hollis DC7 500SE
- Mares Abyss 22X
- Cressi Ideal MC9 Compact
- Zeagle F8
- Scubapro MK17 Evo A700
- Sherwood Blizzard Pro
With the MK 25 Evo A700, you can easily breathe irrespective of the position and depth that you have reached.
This is a lightweight, top-quality, reliable regulator. It has 5 low-pressure ports on a swivel and opposing high-pressure ports, allowing you to mount the regulator up or down.
Tech divers can easily configure it for sidemount or doubles.
- Attractive chrome-plated brass body
- Durable metal second stage
- Extended Thermal Isolation System (XTIS) increases cold water performance by 30%
- Adjustable Venturi and inhalation airflow with easy-grip knobs for use with gloves
- Weight: 2.4 lbs
- Ports: 5 LP, 2 HP
View More Options From Scubapro
It is durable, easy breathing, and set up, especially for extra cold water use.
Factory prepared for 50% Nitrox and oxygen mixes to 80%, it’s ready to go for most technical diving applications.
- Chrome-plated brass first stage body with durable Monel used for key internal components
- Factory-sealed balanced piston first stage for freeze protection and to keep out silt and sand
- The second stage has a thermal heat sink and improved super-dry exhaust valve for cold-water diving
- Automatic Flow Control (AFC) Venturi system which is also manually adjustable
- High-flow second stage for ease of breathing with rapid adjustment knob
- Limited lifetime warranty
- Only needs servicing every 300 dives/3 years
- Weight: 2.3 pounds
- Ports: 5 LP, 2 HP
View More Options From Atomic Aquatics
The Legend LX Supreme is lightweight and suitable for all-around use including cold water.
The over-balanced diaphragm design makes for ease of breathing at depth and is environmentally sealed.
Other features are a single knob for Venturi and airflow adjustment and an auto-closure dust cap for the forgetful diver.
It’s also factory prepared for Nitrox.
- Smaller and lighter than earlier models
- Environmentally sealed first stage keeps contaminants out and for freeze protection
- Over balanced diaphragm first stage compensates for the increased density of breathing gas at depth
- The Venturi switch and breathing flow adjustment knob are combined
- ACD auto-closure device automatically closes the first stage dust cap preventing flooding
- Light-weight braided hoses are included
- Limited lifetime warranty
- Weight: 2.4 lbs
- Ports: 4 LP, 2 HP
View More Options From Aqua Lung
The MTX-R is extremely rugged based on a military design and especially effective in extremely cold icy environments to depths below 60 meters.
Maintenance at the dive site is easy requiring no special tools.
- Over-balanced diaphragm design for ease of breathing at depth
- Overmoulded first-stage endcap for ice build-up and impact damage prevention
- Environmentally dry seal eliminates maintenance with silicone, oil, or grease fillers, keeps out contaminants, and prevents icing
- Lightweight braided hoses are included
- Weight: 2.6 lbs
- Ports: 5 LP, 2 HP
The Hollis DC7 500SE has a side exhaust design that is great for photography sending the bubbles outside the frame of the camera.
This lightweight, sturdy, and reliable regulator has an overbalanced first stage that provides greater intermediate pressure to the second stage for ease of breathing and is environmentally sealed for cold water environments.
Mounting from the left or right, it is suitable for different configurations including doubles and sidemount.
- Great for photography with a side exhaust system
- Environmentally sealed to avoid freeze-up and entry of contaminants
- Orthodontic mouthpiece for comfort and less fatigue
- Can be configured for sidemount or doubles
- Includes lightweight braided hoses
- Weight: 2.4 lbs
- Ports: 4 LP, 2 HP
Slightly heavier than many models, the Mares Abyss 22 is extra sturdy and collision-resistant with its metal construction second stage.
The VAD ease of breathing feature and environmental seal make it great for cold water diving.
It doesn’t require frequent service and is lower priced than most cold-water regulators.
- Brass and nickel first stage is environmentally sealed to keep contaminants out and protect against freeze-up
- Metal body second stage is extra durable
- Mesh-grid second-stage grill design optimizes water flow around the second-stage diaphragm to minimize the chance of free-flow
- Second stage VAD Vortex Assisted Design for ease of breathing at all depths
- Only needs servicing every 200 dives/2 years
- Reasonably priced
- Weight: 3.11 lbs
- Ports: 4 LP/2 HP
The Cressi Ideal MC9 is a fairly lightweight, versatile high-performance regulator with a featherlight 2nd stage of techno-polymers.
It is environmentally sealed and cold-water rated with a balanced second stage that has a downstream valve design and a hyper-balanced diaphragm that provides excellent breathing performance making Venturi adjustment little needed.
The pricing is quite low and it comes with a 2-year limited warranty.
- Hyper-balanced diaphragm first stage
- Featherweight 2nd stage of techno-polymers eliminates jaw fatigue
- Environmentally sealed
- Adjustable Venturi
- Big purge button
- Ports: 4 LP, 2 HP
- Low-priced
- Weight: 1 pound 8 ounces
- 2-year limited warranty
Knobs for airflow and Venturi control are easy to grip for use with gloves.
The balanced diaphragm design and improved exhaust valve make for easy breathing no matter the depth and less exhalation effort.
- Fully environmentally sealed first stage for freeze and contaminants prevention
- Pre-dive airflow switch, easy to grip for use with gloves
- Adjustable Venturi
- Turreted first stage for more versatility
- Easy-grip mouthpiece
- Lightweight
- Weight: 2.6 lbs
- Ports: 5 LP, 2 HP
ro MK17 Evo A700
Paired with the Evo A700, it’s a highly crafted system that will perform well in all settings from dirty to very cold water.
Like the MK25 system, it is a work of art.
- Environmentally sealed for freeze and contaminants prevention
- Durable metal second stage
- First-stage heat exchanger to help prevent freeze-up
- Adjustable Venturi and inhalation airflow with easy-grip knobs for use with gloves
- Balanced diaphragm design for easy breathing at any depth
- Weight: 2.4 lbs
- Ports: 4 LP, 2 HP
View More Options From Scubapro
The Blizzard Pro has a tried and true 30-year-old design known for ease of breathing at depth at very low temperatures.
This regulator’s environmentally dry-sealed first stage is effective against very cold water as is the self-warming second stage.
Even with gloves on, the oversized pre-dive switch on the second stage is easy to manipulate.
Pricing is reasonably low, there is a limited warranty, and it is set up for Nitrox to 40% out of the box.
- Pre-dive switch to limit free flows at the surface
- Heat vanes in the second stage to keep the second stage warm and more comfortable in the mouth
- Environmentally dry sealed (no grease, silicon, gels, etc.) to protect against freeze-up and contaminants
- Free parts for life warranty
- Reasonably priced
- Weight: 3 lbs
- Ports: 4 LP, 2 HP
Comparison Table – Best Cold Water Regulators
Picture Picture
Regulator Scubapro MK25 Evo A700 Atomic Aquatics M1 Aqua Lung Legend LX Supreme Apeks MTX-R Hollis DC7 500SE Mares Abyss 22X Cressi Ideal MC9 Compact Zeagle F8 Scubapro MK17 Evo A700 Sherwood Blizzard Pro Regulator
1st Stage Type Balanced Piston Balanced Piston Over-Balanced Diaphram Over-Balanced
DiaphramOver-Balanced
DiaphramBalanced Diaphragm Balanced Diaphram Balanced Diaphram Balanced Diaphram Balanced Piston 1st Stage Type
2nd Stage Type Balanced Balanced Balanced Balanced Balanced Balanced Balanced Balanced Balanced Balanced 2nd Stage Type
Ports 2HP/5LP 2HP/5LP 2HP/4LP 2HP/5LP 2HP/4LP 2HP/4LP 2HP/4LP 2HP/5LP 2HP/4LP 2HP/4LP Ports
Adjustable Inhalation Yes Yes Yes No No No No Yes Yes No Adjustable Inhalation
Adjustable Venturi Yes Automatic Yes No No No Yes Yes Yes Yes Adjustable Venturi
Price $$$ $$ $$$ $$$ $$ $ $ $$ $$$ $ Price
Rating 5 4.9 4.8 5 4.8 4.6 4.6 4.8 5 4.8 Rating
Scubapro MK25 Evo A700 Atomic Aquatics M1 Aqua Lung Legend LX Supreme Apeks MTX-R Hollis DC7 500SE Mares Abyss 22X Cressi Ideal MC9 Compact Zeagle F8 Scubapro MK17 Evo A700 Sherwood Blizzard Pro
For other scuba regulator reviews, please check out these popular posts:
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Feedback and Comments
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