epanet-js
No installs. No forced cloud storage. Just fast, local-first water modeling — powered by the engine you already trust.
You shouldn't have to choose between speed, security, and affordability just to understand your water networks.


If you want to explore further, let me know if you need a , a breakdown of potion recipes , or help troubleshooting the installation files . Share public link
Faust Se's work is often categorized by its focus on high-contrast visuals or detailed narrative descriptions that emphasize the "process" of change. In the context of the , this creator frequently blends:
If you are looking to cover this game in more depth, let me know if you would like me to analyze: The and ingredient locations The character route guides for the Halloween expansion
Limited-time or holiday-themed releases create a sense of exclusivity. Fans are highly motivated to consume, review, and share content that perfectly aligns with the current calendar season. Futa Concoction -Halloween Special- By Faust Se...
The resulting concoctions lead directly to Halloween-centric transformations, body modification tropes, and supernatural encounters.
The Halloween update features meticulously crafted 3D sequences that are notably more fluid than standard RPG Maker assets. Pixel Art Integration:
Futa Concoction -Halloween Special- serves as a distinct example of how niche erotica utilizes thematic holidays to refresh standard tropes. It combines the transformative fantasy of the futanari genre with the atmospheric indulgence of Halloween, creating a product designed to appeal to specific fetishes regarding power, size, and transformation. It is less a story about characters and more a tableau of exaggerated physiological fantasy, utilizing the "spooky" season to justify the supernatural elements of its sexual dynamics. If you want to explore further, let me
So, what's the connection to Futa Concoction ?
Futa Concoction -Halloween Special- by Faust Se is a seasonal cocktail known for its bold, complex flavor profile that blends dark fruit with sharp, warming spice. Flavor Profile & Ingredients
Potential audience reactions and sensitivities Fans are highly motivated to consume, review, and
In the independent scene, creators operating under names reminiscent of classic literary figures (such as Faust, referencing the legendary German tale of making a deal with the devil for forbidden knowledge and pleasure) often focus on high-fidelity visual assets.
Faust Seiker | Creator of Futa Concoction (An Adult Rpg Maker Game) | Patreon.
Halloween is a time of year when artists and creators often push the boundaries of their imagination, producing unique and captivating works that reflect the spirit of the season. Whether it's through music, art, or other forms of creative expression, Halloween-themed creations have become increasingly popular.
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EPANET was a gift to the industry — free, open-source water modeling for all. But commercial vendors built on it, locked away improvements, and left the community behind.
epanet-js is our answer: a faster, simpler, affordable water modeling tool that protects your privacy and sustains the open-source future of water modeling.
We're proud to be part of the next chapter — and we're just getting started.

When you purchase more features in epanet-js, you're investing in the future of open-source EPANET development.
Our open-source model balances innovation and accessibility:
Anyone can build on our code. The two-year commercial-use delay gives us the incentive to keep pushing forward — and that fuels progress for everyone.
That means when you support us, you support more affordable hydraulic modeling software for the entire community.
Choose the plan that works for you
Individual named license
Floating shared license
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Available for non-commercial projects, learning, and student work.
For curious minds and personal growth.
Free for students and teachers.
Find answers to common questions about epanet-js.
No install. No login. No cloud required.
You may not know this, but for decades, the U.S. EPA has given the water industry an extraordinary gift: the free and open-source hydraulic modeling software EPANET. Odds are, if you've used any commercial hydraulic modeling software today, it was built on the EPANET engine.
The problem is, instead of giving back to their open-source roots like other industries do, big-name software vendors took EPANET's open code, built private tools on top of the engine, and then locked those improvements behind patents and proprietary licenses.
Some vendors even pressured the EPA to focus only on the engine — discouraging any effort to improve the interface or user experience for everyone else.
Those vendors now charge you exorbitant prices to use their software while EPANET lags behind — and utilities, engineers, and educators with smaller budgets suffer.
We think this is backwards — and we're on a mission to change it. We're focused on creating a better experience for the entire hydraulic modeling community.
That's why we built epanet-js under an FSL license — because we want to give you an affordable, easy-to-use water modeling option that creates a sustainable future for open-source EPANET development.
Support EPANET by using software that supports it back.
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now