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Out-of-Stock HALCYON SAFETY DUMP VALVE FOR WING AND ALERT MARKER Quick view

Reference: SP01

Brand: DIRZONE

Flange Screw Replacement Part For Bcd

FLANGE SCREW REPLACEMENT PART FOR BCD SAFETY DUMP VALVE FOR WING AND ALERT MARKER Replacement BCD flange for corrugated elbow,  safety dump valve for wing and SMB.Can be screw on any textile, no welding required PACKAGE INCLUDED - 1 Inside bladder nut- 1 Outside bladder nut- 1 Wing double gasket
€12.88
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First Stage
First Stage Scuba Regulators | DIN, INT, Technical & Sidemount

First Stage

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-20% Reduced price FIRST STAGE F6 SCUBATEC BALLANCED PISTON REGULATOR DIN M25X2 G5/8 FOR ARGON USE 232 BAR WITH HP PORT Quick view

Reference: EF22200

Brand: Scubatec

Scubatec F22 Balanced Piston First Stage DIN 232/300 Bar

Scubatec F22 balanced piston first stage with swivel turret. Technical scuba regulator fully designed and manufactured in Italy, ideal for advanced recreational, DIR, sidemount, and stage configurations. Featuring a swivel turret with 5 LP ports and 2 HP ports, it offers excellent reliability, smooth breathing performance, and outstanding...
€152.24 €190.30
-20% Reduced price New Scubatec F32 diaphragm first stage regulator DIN 300 bar side view with metal handwheel Quick view

Reference: EF32200

Brand: Scubatec

Scubatec F32 First Stage Regulator | Balanced Diaphragm DIN 232 / 300 Bar

The Scubatec F32 is the evolution of the F30 first stage: the same reliable balanced diaphragm design, now with a lighter construction that improves comfort and equipment balance. Featuring a swivel turret, it is ideal for recreational, DIR and sidemount configurations. Available in air or O2 compatible (Viton) versions, 232 or 300 bar, with plastic or...
€152.24 €190.30
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First Stages for Scuba Regulators

The scuba regulator first stage is one of the most important components of scuba equipment, responsible for reducing the high pressure inside the cylinder to a stable intermediate pressure suitable for breathing underwater.

At MOMODIVE you can find a selection of scuba regulator first stages dedicated to recreational diving, technical diving, sidemount and DIR configurations.

Our catalog includes DIN and INT/Yoke configurations, balanced diaphragm and balanced piston first stages, compatible with Nitrox, cold water diving and advanced technical diving.

What Does a Regulator First Stage Do?

The first stage is the component directly connected to the scuba cylinder valve and reduces the high-pressure air inside the tank to a constant intermediate pressure used by the second stage.

This system allows divers to:

  • ensure stable air delivery
  • maintain consistent breathing performance at depth
  • supply second stages, BCDs and drysuits
  • manage recreational and technical diving configurations
  • optimize underwater breathing comfort

Choosing the correct first stage directly affects safety, reliability and breathing performance during the dive.

DIN and INT First Stages

Scuba regulator first stages are mainly available in DIN or INT/Yoke configurations.

Configuration Characteristics Recommended Use
DIN More secure and compact threaded connection Technical diving, sidemount and advanced diving
INT / Yoke Traditional recreational diving connection Recreational diving and dive centers

DIN systems are generally preferred in technical diving thanks to their increased reliability and robustness.

Balanced Diaphragm and Piston First Stages

Our catalog includes first stages designed for different operational needs and scuba diving configurations.

  • balanced diaphragm first stages
  • balanced piston first stages
  • cold water configurations
  • Nitrox compatible systems
  • sidemount first stages
  • DIR and technical diving configurations

Balanced diaphragm first stages are often preferred for cold water and technical diving thanks to their improved protection from external contaminants.

First Stages for Technical Diving and Sidemount

Technical diving and sidemount configurations require reliable and compact first stages optimized for proper hose routing.

Our catalog includes dedicated configurations for:

  • sidemount diving
  • DIR diving
  • stage and decompression cylinders
  • twinset manifold systems
  • rebreather bailout systems
  • deep diving

Technical first stages are designed to provide high breathing performance even in extreme underwater environments.

First Stages for Drysuit Inflation Systems

Our catalog also includes first stages dedicated to drysuit inflation systems, mainly used in technical diving, sidemount and cold water diving configurations.

These systems are commonly used with:

  • dedicated argon cylinders
  • drysuit inflation systems
  • stage and sidemount configurations
  • technical and deep diving
  • compact M18x1.5 cylinder setups

Drysuit inflation first stages are generally designed to provide:

  • compact dimensions
  • optimized hose routing
  • underwater reliability
  • compatibility with argon and drysuit inflation systems
  • easy configuration and maintenance

These systems are especially appreciated in advanced technical diving and cold water drysuit configurations.

Available Brands

At MOMODIVE you can find first stages selected from some of the most appreciated brands in recreational and technical diving.

  • Scubatec – Italian-made first stages appreciated for reliability, easy maintenance and technical configurations
  • Halcyon – dedicated configurations for DIR diving and advanced technical diving
  • Apeks – among the most popular brands for technical, cold water and sidemount diving
  • Atomic Aquatics – high-performance first stages designed for maximum breathing smoothness and premium build quality

Underwater Performance and Reliability

A high-quality first stage significantly improves comfort and safety during dives.

Main advantages include:

  • smooth and stable air delivery
  • high performance at depth
  • improved underwater reliability
  • corrosion resistance
  • optimized cold water configurations
  • simplified maintenance

Regulator Accessories and Components

Complete your scuba setup with accessories and components dedicated to scuba regulators.

First Stage Servicing and Maintenance

Regular servicing of the first stage is essential to ensure safety, reliability and correct underwater performance.

We provide support for regulator servicing and technical maintenance using dedicated spare parts and components compatible with the most common scuba configurations.

Learn More About Scuba Regulators and Diving Configurations

Frequently Asked Questions About First Stages

What is the difference between DIN and INT?

DIN systems use a more compact and secure threaded connection, while INT/Yoke is the traditional recreational diving configuration commonly used in dive centers.

Is a diaphragm or piston first stage better?

Diaphragm first stages are often preferred for cold water and technical diving, while piston systems provide excellent breathing performance and mechanical simplicity.

Can DIN first stages be used with Nitrox?

Yes. Many first stages are Nitrox compatible and also available in O2 clean configurations.

How often should a first stage be serviced?

Service intervals depend on manufacturer recommendations and usage, but servicing is generally recommended every 12 months or after a specified number of dives.

First Stages for Recreational and Technical Diving

From recreational scuba setups to advanced sidemount and technical diving configurations, choosing the correct first stage directly affects breathing comfort, safety and underwater equipment management.

Explore the available configurations and choose the first stage best suited to your diving needs.

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