Description
The Tusa RS-790 Regulator provides performance, durability and comfort, pairing the R-700 1st stage and the S-90 2nd stage. The R-700 is a balanced diaphragm first stage regulator engineered for cold-water diving, featuring a dry ambient pressure chamber to prevent water contact and maintain optimal performance in temperatures below 10°C. Its external ribbed design enhances thermal exchange, minimizing ice formation and the risk of freezing in extreme conditions. The R-700 includes two high-pressure ports and four low-pressure ports, two of which are high-flow, offering up to 15% increased air delivery. Paired with the S-90 second stage, a compact pneumatically balanced unit with a composite housing for insulation, the system provides reliable performance. The S-90 includes a venturi adjustment lever to control airflow and reduce free-flow at the surface while maximizing air delivery during dives.
R-700 1st Stage Features:
- Balanced diaphragm first stage with anti-freeze system
- Dry ambient pressure chamber ideal for temperatures below 50°F/10°C
- Ribbed section to increase heat transfer and resist freezing
- Two H.P. ports and Four L.P. (2 standard/2 high flow) ports
- High flow L.P. ports offer up to 15% increase in air flow
S-90 2nd Stage Features:
- Lightweight, compact composite case design
- Pneumatically balanced system
- Venturi adjustment lever
- Ortho-consciously designed mouthpiece
