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Here are Similar First & Second Stages:
The Venturi-Initiated Vacuum Assist (VIVA) system is a patented Scubapro technology that uses the power of a vacuum assist to reduce the work of breathing, enhancing your comfort during your dive.
In the Scubapro R-Series, 'R' stands for robust and reliable, reflecting the series' focus on creating durable and dependable scuba diving equipment.
The reversible hose attachment makes the Scubapro R195 highly versatile. It's an excellent choice for deco tanks, as well as a reliable second stage for new divers.
A downstream valve in the Scubapro R195 operates in harmony with the incoming airflow, requiring a certain inhalation effort to overcome the spring tension and open the valve. This feature is renowned for its safety and reliability.
The Scubapro R195 Second Stage Regulator is constructed with a reinforced techno polymer casing, making it robust yet lightweight.
Review Summary
2017-04-23T18:47:41
G*dBless the Italians-- it's hard to beat SCUBA-PRO. I have it rigged with my Mk25 on a stage bottle.
DOUGLAS W.
Yes, Venturi Initiated Vacuum Assist (VIVA)
Downstream Demand Valve
Second-Stage Valve Housing: Techno-Polymer
3/8"
7.0 oz (198g) w/o Hose
4048336097253

You need this regulator . . .
By DOUGLAS W.
G*dBless the Italians-- it's hard to beat SCUBA-PRO. I have it rigged with my Mk25 on a stage bottle.
The Scubapro R195 is a new design based on the heritage of the classic R190 second stage, re-engineered with modern features and materials. The R195 combines a classic downstream valve with a large diaphragm and classic purge button. It's simple and robust construction offers the utmost in reliability and makes the R195 the ideal second stage for new divers and a perfect choice for deco tanks thanks to its reversible hose attachment. Classic downstream valves are particularly noted for their legendary safety and reliability. When in use, the downstream valve opens in the same direction as the incoming airflow. To close the valve and stop the airflow, a spring counteracts the force of the incoming air. Therefore, a certain inhalation effort is always required to overcome the spring tension and open the valve. The classic downstream valve is featured in the Scubapro R-Series; here "R" is synonymous with robust and reliable.
The R195 Second Stage has Scubapro's VIVA-patented system. The VIVA uses the power of a vacuum assist to reduce work of breathing and increase breathing comfort. It is diver-adjustable on all current Scubapro second stages. The R195 Regulator weighs 7.0 oz. (198g) and comes with a 3/8" threaded low pressure hose.
https://www.scubapro.com/scubapro-warranty
800-467-2822