Three Nested Conical Copper Caps

Three nested conical copper caps — for lack of a better term — each with essentially spiraling rifling to guide the flow. The rifling spirals one way on the first layer, reverses on the second, and comes back up and out on the third. No moving parts. Just geometry doing the work.

From a physics and fluid mechanics standpoint, this structures a vortex-induced pressure-differential system. Forcing fluid through changing geometric boundaries and tight directional reversals leverages physical principles instead of mechanical ones:

                  [ Outflow: Layer 3 (Up & Out) ]
                             ^       ^
                            /         \
              =============/===========#=============
             /  Layer 3: Conical Cap (Upward Spiral) \
            /   -----------------------------------   \
           /   / Layer 2: Conical Cap (Downward)   \   \
          /   /   -------------------------------   \   \
         /   /   / Layer 1: Core Cone (Upward)   \   \   \
        /   /   /                                 \   \   \
       [ Inflow ]                                 [ Inflow ]

The flow path, layer by layer

Layer 1 — the core ascent. Fluid enters the innermost conical cap. The internal rifling forces it into a tight, upward-accelerating spiral. Because the cone tapers, the fluid compresses into a smaller area as it climbs — and by mass conservation (the Venturi effect), velocity climbs sharply while pressure drops, forcing a rapid spin at the top apex.

Layer 2 — the counter-rotating drop. The fluid hits the apex and overflows into the second nested layer, where the geometry forces a 180-degree physical inversion. Here the rifling is pitched in the opposite direction. Forcing a highly accelerated spinning fluid to instantly reverse its rotational momentum creates a severe shear zone — boundary-layer collision, high turbulence, localized cavitation zones, intense kinetic friction against the copper walls.

Layer 3 — the final outward vortex. The fluid hits the base of the second layer and is forced back up and out through the third and final outer cap. The rifling flips direction once more, matching the initial rotation or stabilizing it into a wide, expanding vortex. As the cone widens toward the exit, velocity drops and kinetic energy translates back into static pressure.

What it's for: off-grid water

Copper is highly conductive and antimicrobial, and the whole device runs on fluid velocity alone. In a gravity-fed or low-pressure off-grid setup, that gives three functions:

1. Kinetic cavitation and pathogen disruption. The sheer force of fluid snapping from a clockwise vortex to a counter-clockwise vortex creates low-pressure micro-bubbles that violently collapse — cavitation. That mechanical stress can physically rupture the cellular walls of soft-bodied micro-organisms suspended in greywater or harvested rainwater: a passive, non-chemical pre-treatment phase before filtration.

2. Kinetic de-aeration and particulate separation. Forcing fluid into a multi-layered, tight rotational arc acts as a high-velocity centrifuge. Heavier particulate matter — fine silt or sand that slipped past coarse filters — gets slung outward against the rifling walls by centrifugal force and drops out of the main stream. At the same time, dissolved gases strip out of the water at the low-pressure apex points, purging volatile compounds and trapped air before the flow reaches storage or the garden line.

3. Copper-ion passivation. Copper is naturally oligodynamic — toxic to bacteria, viruses, and algae on contact. The nested cones and spiraling rifling vastly increase the surface-area-to-volume ratio; the fluid can't bypass the copper, it drags along the metal across all three layers. That maximizes contact time, letting the copper walls passively inhibit bacterial growth and algae formation inside the device, with no chemicals added to the greywater loop.

Refining it for fabrication

The open variables are dimensions, target flow rate, spiral pitch ratio, and placement — primary input of the collection tanks versus right before the garden irrigation line. The geometry is the engine; the numbers tune it to the site.