A Gensen unit installs behind a standard shower enclosure. It captures every drop from the drain, cleans it, and returns it to the showerhead. Two paths run at the same time, on two different clocks.
Water is driven through particulate filtration, carbon, and a UV-C disinfection stage, then delivered clean and temperature-stable, continuously, for as long as the water runs.
When the shower is off, water keeps moving through layered gravity columns over two to four hours, using no energy at all. The water actually gets cleaner the longer it sits, something no conventional plumbing can do.
A replaceable insert sits at the drain and catches soaps, oils, and hair before water enters the system. Passive, no power. It swaps in 60 seconds with no tools.
Tier 1 · Drain CaptureCaptured water transfers to the on-board reservoir, the heart of the closed loop, where both paths draw from and return to the same body of water.
Capture & transferBetween sessions, water passes slowly through layered gravity columns over two to four hours. No pump, no power, just time and gravity doing the work in the background.
Tier 2 · Gravity ColumnsWhen you turn on the shower, the pump drives water through particulate and carbon filtration, then a UV-C disinfection stage, interlocked so it only runs with the pump confirmed running.
Tier 3 · Active RecirculationClean, temperature-stable water returns to the showerhead. The same water you started with, delivered again, on 91% less fresh supply. Then it begins the loop once more.
↻ The loop closesThis is the real engineering layer beneath the product, a live digital twin rendered in your browser. Orbit the unit, peel back the walls, open the access panel, and watch the water flow through every tier.
That is the whole idea. Reuse the same water continuously and never notice the difference.