First Stage Kits

Cressi XS2/AC2 Piston Regulator

57 reviews

SKU: CSBRXS2

^$219.95

+ wishlist

In Stock

DESCRIPTION

A dependable piston regulator with a marine-grade brass 1st stage and durable hi-tech polymer 2nd stage.

Pros

Lightweight and comfortable
Reliable and dependable
Affordable and good value for money
Easy and effortless breathing
Versatile and works in both cold and warm water

Scubapro "300 bar" (4350 psi) DIN Conversion Kit

36 reviews

SKU: SCPDC3

~~$69.95~~ Save: $20 (29%)

^$49.95

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In Stock

DESCRIPTION

A Durable and easy-to-install DIN conversion kit for Scubapro regulators, perfect for traveling divers.

Pros

Fast and easy conversion
Excellent quality
Easy installation
Reliable
Works as advertised

Scuba Regulator & Octo Grab Bag

15 reviews

SKU: SCBR1O

~~$514.90~~ Save: $134.95 (26%)

^$379.95

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In Stock

DESCRIPTION

A reliable and balanced scuba regulator and octo grab bag for underwater diving.

Oceanic Alpha 8 SP5 Piston Regulator, Black

13 reviews

SKU: OCNA8SP5BK

^$334.95

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In Stock

DESCRIPTION

A durable black piston regulator with easy breathing, Nitrox compatibility, and exceeding safety standards.

Highland by XS Scuba Stage Bottle Strap Kits

12 reviews

SKU: XSSSBSK7

^$76.95

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In Stock

DESCRIPTION

A durable strap kit for technical diving that secures and supports extended bottom time.

Mares Abyss 22 Navy II Regulator

10 reviews

SKU: MRSAN22

^$869.95

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In Stock

DESCRIPTION

A high-performance scuba diving regulator with an environmentally sealed, balanced diaphragm design for extreme conditions.

Mares Prestige 15X and Prestige Octopus Package

10 reviews

SKU: MRSPKPRGY

~~$619.90~~ Save: $170.90 (28%)

^$449

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In Stock

DESCRIPTION

A lightweight Mares regulator package with diaphragm first-stage, 4 LP ports, and 2 HP ports.

Highland by XS Scuba Compact DIN First Stage

9 reviews

SKU: XSSCDF

^$109.95

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In Stock

DESCRIPTION

A compact and low profile DIN first stage with fail-safe flow, made of marine grade brass.

Cressi XS2/AC2 Regulator and XS Octopus Package

9 reviews

SKU: PCKXS2

~~$344.90~~ Save: $45.90 (13%)

^$299

+ wishlist

In Stock

DESCRIPTION

A lightweight, high-performance regulator and octopus package with a non-balanced flow-by piston design.

Mares LED Tank Module

8 reviews

SKU: MRSQT

^$339.95

+ wishlist

In Stock

DESCRIPTION

A Mares LED Tank Module with RF transmission, LED indicator for tank pressure, and streamlined dive profile.

Atomic Aquatics B2 Sealed Regulator Yoke

7 reviews

SKU: ATMB2SS

^$1019.95

+ wishlist

In Stock

DESCRIPTION

A lightweight, ergonomic regulator with a titanium second stage and patented comfort swivel.

Scubapro MK25 EVO/A700 Dive Regulator System

6 reviews

SKU: SCPM25EA70

^$1254

+ wishlist

In Stock

DESCRIPTION

A high-performance regulator set with customizable breathing options and enhanced cold-water diving capabilities.

Atomic Aquatics M1 Regulator Yoke Sealed

6 reviews

SKU: ATMM1BK

^$1019.95

+ wishlist

In Stock

DESCRIPTION

A high-performance regulator designed for extreme diving situations, with nitrox-ready capabilities and freeze protection.

Blue Reef Spanner Wrench

5 reviews

SKU: AQUSW3

~~$24.95~~ Save: $7 (28%)

^$17.95

+ wishlist

In Stock

DESCRIPTION

A durable Blue Reef Spanner Wrench with three pins and plastic-coated steel handle for serious divers.

Atomic Aquatics Z3 Regulator Yoke

4 reviews

SKU: ATMZ3RY

^$719.95

+ wishlist

In Stock

DESCRIPTION

A budget-friendly, high-performing regulator with self-lubricating seal, freeze protection, and swivel for easy underwater movement.

Scubapro MK25 EVO/G260 Regulator

4 reviews

SKU: SCPM25EG26

^$1063

+ wishlist

In Stock

DESCRIPTION

A high-performance regulator set with adjustable 2nd stage, 5 LP ports, and enhanced freezing resistance.

Hollis DC7 First Stage Only

4 reviews

SKU: HLSFSDC7Y

^$339.95

+ wishlist

In Stock

DESCRIPTION

A high-performance, environmentally sealed first stage regulator with DIN fitting and NITROX compatibility.

Scubapro MK25 EVO/A700 Carbon BT Yoke Dive Regulator System

3 reviews

SKU: SCPM25EA7CB

^$1749

+ wishlist

In Stock

DESCRIPTION

A durable and sleek black regulator with adjustable 2nd stage and enhanced cold-water diving capabilities.

Cressi XS2/AC2 Regulator, XS Octopus and Mini 2 Gauge

3 reviews

SKU: PCKXS22G

~~$544.85~~ Save: $99.90 (18%)

^$444.95

+ wishlist

In Stock

DESCRIPTION

A reliable and comfortable regulator system with primary, octopus, and analog pressure/depth gauge console.

Sherwood Magnum Pro Regulator

3 reviews

SKU: SWDRMP

~~$424.95~~ Save: $125.95 (30%)

^$299

+ wishlist

In Stock

DESCRIPTION

A rugged and reliable regulator with a pneumatically balanced 2nd stage and environmentally sealed design.

Sherwood SR2 Regulator

3 reviews

SKU: SWDSR2

^$749.95

+ wishlist

In Stock

DESCRIPTION

A truly balanced first-stage regulator with a sealed dry spring chamber for durability and easy tuning.

Atomic Aquatics B2 Sealed Regulator, DIN

3 reviews

SKU: ATMB2SDBK

^$1019.95

+ wishlist

In Stock

DESCRIPTION

A DIN-type, environmentally sealed first stage regulator with swivel design and automatic flow control.

Mares Ultra 62X Yoke Diving Regulator

2 reviews

SKU: MRSULT62YRG

~~$549.95~~ Save: $82.49 (15%)

^$467.46

+ wishlist

In Stock

DESCRIPTION

A high-performance, lightweight diving regulator with innovative twin power system and easy-to-use purge button.

Scubapro Mark 25 EVO Regulator, First Stage Only

2 reviews

SKU: SCPM25E

^$506

+ wishlist

In Stock

DESCRIPTION

A top-performing Scubapro first stage regulator with superb inhalation sensitivity and 5 LP ports.

Highland by XS Scuba Spanner Wrench

2 reviews

SKU: XSSWS

^$31.95

+ wishlist

In Stock

DESCRIPTION

A versatile spanner wrench with adjustable range and threaded spanner pins for multiple regulator models.

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First Stage Kits

First stage kits are a cornerstone of responsible scuba diving equipment maintenance, designed for divers who understand the importance of keeping their gear in peak condition for every underwater adventure. These kits provide all the essential components needed to service the first stage of a regulator—the critical piece that connects directly to your scuba tank and reduces the high-pressure air to a manageable, intermediate level for safe breathing. Inside a typical first stage kit, you’ll find precision-engineered O-rings, durable seals, and various other replaceable parts that are subject to wear from repeated use, exposure to saltwater, and the rigors of travel. Whether you’re a recreational diver who enjoys exploring warm, late-summer reefs or a technical diver prepping for deeper, colder dives as autumn approaches, regular servicing with these kits ensures your regulator delivers consistent, reliable performance. Divers who have experienced the subtle hiss of a leaky O-ring or the resistance of a poorly maintained regulator know that the difference between a flawless dive and an aborted one often comes down to the smallest components.

For those who take pride in their gear or enjoy the satisfaction of a hands-on approach, first stage kits are an invaluable addition to any dive locker. They are also a thoughtful gift for the dedicated diver in your life—perhaps someone who logs dozens of dives each season, or a new open water graduate eager to learn the ropes of gear care. Keeping a first stage kit on hand means you’re prepared for the unexpected: a torn seal discovered during a pre-dive check or a scheduled annual service before a much-anticipated trip. As the diving season transitions from the balmy days of September into cooler months, ensuring your regulator is freshly serviced can make all the difference when venturing into brisker waters or planning that bucket-list dive vacation. While most divers rely on certified technicians for full regulator servicing, having the right kit ensures that any necessary repairs or replacements are done with manufacturer-approved parts, preserving the performance and longevity of your equipment. For those with more complex setups or who switch between yoke and DIN tanks, it’s also worth exploring First Stage Adapters to further customize your regulator configuration.

Maintaining your first stage with the appropriate kit not only extends the lifespan of your regulator but also upholds the safety and enjoyment of every dive. The peace of mind that comes from knowing your air supply is secure and functioning optimally cannot be overstated—especially when you’re descending along a kelp forest, gliding over a shipwreck, or navigating a vibrant coral garden. Regularly replacing worn components helps prevent performance issues like free-flowing air, difficulty breathing, or damaging leaks that can result from corrosion or saltwater intrusion. Many seasoned divers recall the relief of having a spare service kit tucked in their gear bag when a minor issue arose far from the nearest dive shop. Whether you’re gearing up for a weekend getaway or preparing for a liveaboard expedition, investing in first stage kits and adhering to a routine maintenance schedule is a hallmark of a prepared and conscientious diver. This level of care not only protects your investment but ensures that every dive—no matter the season or destination—starts and ends with confidence.

Top Picks For First Stage Kits