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.


Let me think about the structure. The user probably wants a study guide or a quick reference. So I can outline main sections like key reactions, important rearrangements (like Pinacol, Beckmann, Curtius), and reagents (e.g., Grignard, Lucas reagent). Maybe include reaction mechanisms, conditions, and major applications. Also, common mistakes to avoid or exceptions in the reactions could be useful.
Check if there's any confusion with similar book titles or authors. S.N. Sanyal's book is well-known in Indian JEE circles, so the user likely knows this. Maybe mention the book's reputation and use it as an authority, but don't provide the PDF. Emphasize studying from legitimate sources and perhaps suggest official study materials or other references if available. Let me think about the structure
Wait, the user might be looking for an alternative if the repacked PDF isn't accessible. Maybe suggest other resources or chapters from S.N. Sanyal that they can legally access. But I can't recommend pirated sources or provide the content. So I'll stay within the bounds and create a summary based on public knowledge of the book's content. The target audience is probably students
I should also check if there are any recent updates or additions to the book that might be relevant. However, since Sanyal's book is a classic and not actively maintained, maybe stick to the standard topics. Organize the text into sections for clarity—like reactions, rearrangements, reagents, each with bullet points listing important ones with brief descriptions. Use bullet points or numbered lists to make it easy to read. or important notes from the book.
In summary, the response should outline key topics from the book, provide examples with brief explanations, and remind the user to use legal resources while offering a helpful summary of the content they need to know.
I also need to make sure the language is clear and concise, avoiding jargon where possible or explaining it when necessary. The target audience is probably students, so the explanation should be accessible but thorough enough to be useful for exam preparation.
Wait, the user mentioned generating "useful text" for the topic. They might be seeking a summary, key points, or important notes from the book. Since the original book is a standard reference for JEE preparation in India, the user might be a student looking to quickly revise the content. But I have to be careful here—providing copyrighted material like the full PDF is against the rules. So I can't just point them to where they can download it. Instead, I should focus on creating a concise summary or important points directly from the text without reproducing the entire book.
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
Have questions? or book a call.
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.
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