White acetal Poseidon Jetstream first stage internal component assembly toolset and stacking fixture.

Simplify your regulator reassembly with the specialized Poseidon Jetstream First Stage Toolset. Purpose-built for professional dive shops, life-support technicians, and serious scuba enthusiasts, this dual-piece alignment set functions as an indispensable fixture for overhauling classic Poseidon high-pressure breathing systems.

Rebuilding a Poseidon Jetstream first-stage regulator requires managing an intricate internal balancing mechanism. Stacking the valve parts—including the valve centre, o-rings, valve seat, internal piston, and main spring—manually inside the narrow body can cause components to shift out of order, pinch dynamic seals, or seat crookedly. This toolset completely solves this workshop headache by acting as an external stacking fixture. By organizing the components on the tool first, you can smoothly slide the regulator body over the entire assembly in one motion, safeguarding delicate internal elements and guaranteeing flawless mechanical alignment.

How It Works:

Seat the High-Pressure Valve: Use the smaller rod from the toolset to firmly press the replacement high-pressure seat straight into its designated position inside the regulator.
Stack the Internal Parts: Utilizing the main fixture base of the toolset, stack the remaining internal elements sequentially in their exact order: valve centre with o-rings, valve seat with o-ring, valve piston, and the spring.
Invert and Assemble: Align the regulator body over the stacked tool fixture and slowly slide the body downward until all components seamlessly mesh into place inside the housing.
Remove the Fixture Safely: Firmly grasp both the regulator body and the base of the toolset, carefully turn the entire assembly upside down, and lift the tool cleanly away.

Key Features & Specifications:

External Stacking Design: Functions as a precision workshop fixture to hold internal component stacks upright for perfect, error-free first-stage assembly.
Premium Acetal Construction: Precision-machined from low-friction white acetal (POM-C) to prevent any scratching, marring, or damage to delicate brass and chrome internal surfaces.
Component Safeguard: Drastically reduces the risk of pinched dynamic o-rings, misaligned springs, or tilted internal valve housings during rebuilds.
Targeted Compatibility: Explicitly engineered for perfect mechanical alignment with Poseidon Jetstream first-stage regulator models 3720 and 3790.

The part is used as a fixture for the following parts: