First Stage Scuba Regulators & Second Stage Regulators

222 results

Shop Used (22)

First & Second Stages

Apeks (22)Aqualung (23)Atomic Aquatics (20)Cressi (8)Dive Rite (11)Hollis (9)Mares (31)Scubapro (43)Seac (15)Sherwood (11)

Price Range

$100 to $250 (14)$250 to $500 (65)$500 to $750 (65)$750 to $1000 (36)$1000 to $2500 (41)$2500 to $5000 (4)

Bundle & Save (1)Free Shipping (221)In Stock (187)Kits only (29)Non-Kits (193)Recent Releases (6)Specials (61)Top Rated (75)

Discount

10% Off or More (63)25% Off or More (15)35% Off or More (7)50% Off or More (1)

Color

Black (210)Blue (7)Gold (1)Gray (14)Green (5)Red (6)Silver (134)White (8)Yellow (29)

Configuration

First & Second Stage Set (180)First Stage Only (25)Second Stage Only (18)

Special Features

Adjustable 2nd Stage (80)DIN Fitting (71)Environmentally Sealed (51)INT Fitting (26)Lightweight (55)O2 Ready (14)Swivel 2nd Stage (23)Titanium (17)

HP Ports

1 HP Port (30)2 HP Ports (167)

First Stage Type

Diaphragm (122)Piston (70)

LP Ports

3 LP Ports (2)4 LP Ports (117)5 LP Ports (73)6+ LP Ports (2)

By Activity

Military & Rescue (27)Scuba (28)

Mares Dual Adj 62X INT Regulator

SKU: MRSDA62MFR: 416278BKBKINT

Optimal reliability ensures consistent breathing.
Balanced diaphragm offers effortless air delivery.
Robust technopolymer enhances diving durability.
Low-maintenance design minimizes service needs.
Comfortable wear, even in cold water dives.
Superflex hose for superior maneuverability.

New Arrival

^$569^.95

$657.95

Save: $88.00 (13%)

In Stock

Free Shipping

Mares 82X First Stage INT Regulator

SKU: MRS1S82MFR: 416248INT

Unrivaled scuba reliability for confident dives.
Balanced diaphragm ensures effortless breathing performance.
Durable build guarantees long-lasting regulator safety.
Optimized design for simple, low-maintenance care.
Exceptional first stage comfort and secure fit.
Premium Mares engineering: 2 HP, 5 LP ports.

New Arrival

^$637^.95

In Stock

Free Shipping

Mares 15X First Stage INT Regulator

SKU: MRS1S15UBKIMFR: 416237INT

Optimal Scuba diving safety and performance.
Reliable air delivery for deep water dives.
Effortless breathing comfort and diaphragm tech.
Durable design for extreme dive conditions.
Low-maintenance scuba regulator for divers.
Enhanced diving experience, unmatched comfort.

New Arrival

^$359^.95

$397.95

Save: $38.00 (10%)

In Stock

Free Shipping

Mares 15X First Stage DIN Regulator

SKU: MRS1S15ABKDMFR: 416237DIN

Exceptional Mares reliability for critical dives.
Balanced diaphragm ensures easy, smooth breathing.
Durable design offers extended regulator lifespan.
Effortless maintenance of this robust scuba gear.
Comfortable, lightweight scuba first stage (20.8oz).
Optimize dive comfort with quality 15X regulator.

New Arrival

^$359^.95

$397.95

Save: $38.00 (10%)

In Stock

Free Shipping

Mares 22 Navy II First Stage INT Regulator

SKU: MRS1S22RNVMFR: 416270INT

Optimal breathing with balanced diaphragm scuba regulator.
Engineered for reliability in extreme cold waters.
Durable construction ensures lasting dive performance.
Easy-to-maintain design for consistent scuba safety.
Advanced first stage offers superior air delivery.
Precision engineering for effortless breathing control.

New Arrival

^$449^.95

$499.95

Save: $50.00 (10%)

In Stock

Free Shipping

Mares R2S First Stage INT Regulator

SKU: MRS1SRBKIMFR: 416232INT

Robust piston design ensures dive reliability.
Streamlined for effortless underwater breathing.
Durable build guarantees long-lasting performance.
Simplified maintenance for hassle-free diving.
Lightweight design, perfect for dive travel.
Optimize airflow for superior dive comfort.

New Arrival

^$229^.95

$257.95

Save: $28.00 (11%)

In Stock

Free Shipping

Mares Prestige 15X and Prestige Octopus Package

SKU: MRSPKPRMFR: MRSPKPRGY

(10)

Mares regulator: reliable, downstream 2nd stage.
Balanced diaphragm 1st stage ensures consistent airflow.
Lightweight scuba regulator; travel-friendly design.
Nitrox compatible regulator, up to 40% oxygen.
Durable build: chromed brass, techno-polymer stages.
Easy maintenance regulator; extended product lifespan.

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Save $171

^$449^.00

$619.90

Save: $170.90 (28%)

In Stock

Free Shipping

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Sherwood Magnum Pro Regulator

SKU: SWDRMPMFR: SRB9350

(3)

Sherwood regulator: reliable, balanced piston 1st stage.
Adjustable 2nd stage for optimal breathing effort.
Durable, marine-grade brass Sherwood scuba regulator.
Nitrox compatible regulator, up to 40% oxygen blend.
Compact regulator design with dive/pre-dive switch.
2 HP ports & 4 LP ports for versatile hose routing.

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Free Gift

^$299^.00

$424.95

Save: $125.95 (30%)

In Stock

Free Shipping

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Seac PX100 230 INT Regulator

SKU: SECP230IMFR: 0350095000004A

Seac INT Regulator: Reliable scuba gear, CE certified.
Dive confidently with this high-performance regulator.
Enjoy effortless breathing with Venturi Dive/Pre-Dive.
Cold water regulator: Excellent performance below 50°F.
Durable scuba regulator: Built to last, 1 HP & 4 LP ports.
Compact & lightweight Seac regulator for easy travel.

Save $91

^$204^.00

$295.00

Save: $91.00 (31%)

In Stock

Free Shipping

Zeagle Envoy II DIN Regulator

SKU: ZGLEDNMFR: 350-3320

(2)

Zeagle Envoy II regulator: reliable scuba gear.
Balanced diaphragm 1st stage for consistent airflow.
Adjustable 2nd stage: Dive/Pre-Dive Venturi switch.
Nitrox compatible regulator, up to 40% O2 ready.
Durable chrome-plated brass, stainless steel build.
Compact & lightweight regulator: 3.22 lbs (1.46 kg).

Top Rated Gear

^$449^.95

In Stock

Free Shipping

Scubapro MK25 EVOBT/S620Ti 60th Anniversary Edition, Open Box

SKU: SCPMEBTMFR: 12.620.450+OB

Scubapro Regulator: Reliable, high-performance scuba gear.
Dive Regulator System: Enjoy effortless, easy breathing.
Adjustable 2nd Stage: Customize your dive experience.
Cold-Water Rated Regulator: Durable for any environment.
Compact Scuba Regulator: Lightweight for travel and diving.
Balanced Piston 1st Stage: Consistent air delivery.

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Free Gift

^$1749^.99

$2,200.00

Save: $450.01 (20%)

In Stock

Free Shipping

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Tusa Compact Diaphragm Regulator

SKU: TBTDPR

Tusa regulator: reliable, smooth breathing.
Compact regulator: ideal for travel, lightweight.
Diaphragm regulator: cold-water rated, durable.
Adjustable regulator: customize your dive easily.
High-flow piston: consistent air delivery system.
Ergonomic mouthpiece: enhanced comfort, less fatigue.

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Save $30

^$499^.00

$528.95

Save: $29.95 (6%)

In Stock

Free Shipping

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Atomic Aquatics Z2 Regulator, Yoke

SKU: ATMZ2SGYMFR: 03-0050-3P

Atomic Aquatics Z2 Regulator: Reliable air delivery system
Experience reliable air delivery with the Atomic Aquatics Z2 Regulator, ensuring smooth, effortless breaths
Adjustable breathing via flow control knob feature
Durable construction with chrome plated brass
Compact design for streamlined scuba diving
Easy maintenance with quality regulator materials

^$599^.95

In Stock

Free Shipping

Genesis Prana Regulator

SKU: GNSPRMFR: GR910

(1)

Balanced regulator ensures effortless breathing.
Compact scuba regulator design for easy travel.
Cold-water regulator: reliable in all conditions.
Adjustable 2nd stage for custom dive settings.
High-performance regulator with balanced design.
Durable scuba gear: reliable first and second stage.

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Free Gift

^$424^.95

$489.00

Save: $64.05 (13%)

In Stock

Free Shipping

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Scubapro R105 Regulator, Second Stage Only

SKU: SCPR105RMFR: 11.332.000

Scubapro R105: Reliable second stage regulator.
Downstream valve ensures easy, consistent breathing.
Compact Scubapro regulator; travel-friendly design.
Ideal for novice divers & diving center environments.
Enjoy Scubapro's lifetime limited regulator warranty.
Durable regulator built for years of diving use.

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Free Gift

^$229^.00

$258.95

Save: $29.95 (12%)

In Stock

Free Shipping

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Atomic Aquatics Z2 Regulator, DIN

SKU: ATMZ2DGRMFR: 03-0050-4P

Atomic Aquatics Z2 Regulator: Reliable scuba gear
Experience effortless, reliable breathing with the Atomic Aquatics Z2 regulator system
Balanced piston 1st stage for optimal airflow
Adjustable 2nd stage ensures effortless breathing
Durable build: stainless steel & brass parts
Compact regulator design; travel-friendly size

^$599^.95

In Stock

Free Shipping

TUSA RS-1207 Regulator

SKU: TBTRS1207MFR: RS1207E BK

TUSA regulator: reliable scuba gear, dive ready.
Balanced design ensures easy breathing underwater.
Adjustable 2nd stage for customized dive control.
Compact size: travel-friendly scuba regulator.
Four LP ports offer versatile hose configurations.
Durable build: marine brass 1st stage regulator.

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Free Gift

^$349^.00

$378.95

Save: $29.95 (8%)

In Stock

Free Shipping

Includes Free

$29.95Value:

Scuba.com Round Regulator Bag

Mares 28XR with HR Full SM Tek Regulator Set, DIN

SKU: MRS28XSMFR: 416419BK NR

Mares 28XR regulator set for reliable scuba gear.
Balanced regulator design ensures easy, natural breathing.
Cold-water rated regulator for extreme diving conditions.
Adjustable 2nd stage for personalized scuba experience.
Compact size regulator; ideal for travel and storage.
Full SM Tek regulator set includes Miflex XT-Tech hoses.

Save $298

^$1699^.95

$1,997.95

Save: $298.00 (15%)

In Stock

Free Shipping

Atomic Aquatics Z3 Regulator Yoke

SKU: ATMZ3RYMFR: 03-0090-3P

(4)

Atomic Aquatics Z3 Regulator: Superior breathing performance
Breathe easy with the Atomic Aquatics Z3 regulator, designed for smooth, reliable air delivery underwater
Durable scuba gear: Corrosion-resistant materials used
Compact regulator design: Lightweight for travel
Easy maintenance regulator: Simplified service needs
Cold-water regulator: Reliable in all conditions

Top Rated Gear

^$719^.95

In Stock

Free Shipping