Apeks DS4 First Stage: High-Performance & Durable

Divers of all levels favor the Apeks DS4 First Stage regulator. It works well for single tanks, twinsets, and stage bottles. This regulator is known for its durability, performance, and ease of use. Divers consider it "bombproof," even on deep dives.

The DS4 boasts an over-balanced design. Intermediate pressure increases more than ambient pressure as you descend. This provides a smoother breathing experience at depth. A diaphragm controls the gas flow, not a piston. This design is durable and reliable, especially in cold water.

The DS4 1st stage features an environmentally sealed dry chamber. This prevents water contact with the first stage spring, preventing freezing. The Apeks DS4 1st Stage is a reliable workhorse. 

Apeks DS4 First Stage regulator has four intermediate-pressure ports and one high-pressure port. This well-respected regulator is a great choice. It offers high quality and long-lasting performance without a high price. While Apeks makes DS4s in DIN and Yoke configurations, we stock the more reliable DIN versions. 

Features Apeks DS4 First Stage:

• Diaphragm-type design: Ensures durability and cold-water performance.
• Over-balanced design: Provides smooth breathing at depth.
• Environmental dry system: Prevents water contact with the spring.
• Four medium-pressure ports: Offers versatility.
• One high-pressure port: For pressure gauge.
• DIN fitting.

Pros

• Durable and reliable
• Smooth breathing at depth
• Cold water capable
• Usable right side up or upside down
• Easy to use
• Polished chrome finish
• Widely available
• Easy to service

Cons

• Only one HP port
• No swiveling turret
• No 5th port option

The Apeks DS4 First Stage is also available as a DST model, which offers a swiveling turret with two HP ports. This is excellent for hose routing, whether you dive single tank, twinset, or stage bottles. The DST's 5th Port option also makes it ideal for sidemount diving.