Cold-Water Performance. Technical Versatility.

The Tecline R4 TEC2 is a high-performance regulator designed for divers who demand dependable breathing performance in challenging conditions. Combining the R4 TEC balanced diaphragm first stage with the TEC2 second stage, it delivers smooth, consistent performance while providing the cold-water protection and configuration flexibility needed for advanced recreational and technical diving.

With a dry chamber and cold-water kit, four low-pressure ports, two high-pressure ports and a maximum working pressure of 300 bar, the R4 TEC2 is built to perform when conditions become demanding.

Built for Challenging Conditions

The R4 TEC first stage uses a compensated diaphragm design with a dry chamber and cold-water protection. This helps isolate the internal mechanism from the surrounding water and makes the regulator well suited to colder diving conditions.

With 4 LP and 2 HP ports, the R4 TEC provides plenty of flexibility when routing hoses for different configurations, whether you’re diving a single cylinder, twinset or another advanced setup.

The first stage is rated for pressures up to 300 bar, while the regulator is certified to the relevant EN250 standard.

Smooth, Adjustable Breathing

The TEC2 second stage is designed to provide comfortable and controlled breathing performance.

A Venturi adjustment helps fine-tune the breathing characteristics, while the breathing-resistance adjustment allows the diver to tailor the regulator to their preference and diving conditions. The TEC2 also incorporates a Direct Flow System and cold-water features designed to help maintain reliable performance in demanding environments.

Its design also makes the second stage practical for use with gloves and in colder conditions, where simple controls and reliable operation matter.

Ready to Grow With Your Diving

The R4 TEC2 is suited to divers who are moving beyond basic recreational diving and want a regulator that can support more advanced configurations.

It can be used for:

Advanced recreational diving
Cold-water diving
Technical diving
Twinset configurations
Stage-cylinder applications
Extended-range diving

The combination of a diaphragm first stage, cold-water protection and flexible port configuration makes the R4 TEC2 a versatile option for divers whose equipment requirements are becoming more demanding.

Key Features

R4 TEC compensated diaphragm first stage
Dry chamber with cold-water protection
TEC2 second stage
Adjustable Venturi
Breathing-resistance adjustment
Direct Flow System
4 LP ports and 2 HP ports
Maximum working pressure: 300 bar
Designed for cold-water diving
EN250 / EN250A certified configurations
Suitable for advanced recreational and technical diving
Available in configurations including octopus and gauge options

Who Is It For?

The Tecline R4 TEC2 is an excellent choice for:

Experienced recreational divers
Divers progressing into technical diving
Cold-water divers
Twinset divers
Divers using stage cylinders
Divers looking for flexible hose routing
Those wanting a regulator capable of supporting more advanced configurations

Built When Conditions Get Tough

As your diving progresses, your regulator needs to be ready for more than easy conditions.

The Tecline R4 TEC2 combines a balanced diaphragm first stage, cold-water protection and adjustable second-stage performance to deliver dependable breathing across demanding dives.

Whether you’re exploring colder waters, progressing into technical diving or simply want a regulator with the capability to grow alongside your diving, the R4 TEC2 provides the performance and versatility to take you further.

Cold-water capability. Technical performance. Built to go further.

Order your gear today

Shipping and availability

Shipping is calculated manually for each item. Please contact Zero Limits Diving for a shipping quote before placing your order.

Not all items are held in stock. Product availability, including sizes and colours where applicable, is subject to supplier availability. Please confirm availability with Zero Limits Diving before placing your order.

diveing regulator

Tecline R4 TEC2: The Ultimate Cold-Water Regulator