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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
iSpring RTW5 Compatible Filter Kit with 50 GPD Membrane1 Year Compatible Filter Replacement Kit with RO Membrane for iSpring RTW5 Reverse Osmosis System INCLUDES: STAGE 1 1x Sediment Pre Filter (RW SED2510050) Replace every 6 12 months or as needed STAGE 2 1x Carbon GAC Pre Filter (OCB934RO T33) Replace every 6 12 months or as needed STAGE 3 1x Carbon Block Pre Filter (OMB934 5m) Replace every 6 12 months or as needed STAGE 4 1x RO Membrane TLC 50 GPD (200359) Replace every 24 months STAGE 5 1x Inline
1-Year Compatible Filter Replacement Kit with RO Membrane for iSpring RTW5 Reverse Osmosis System
INCLUDES:
- STAGE 1 - 1x Sediment Pre-Filter (RW-SED2510050) - Replace every 6-12 months or as needed
- STAGE 2 - 1x Carbon GAC Pre-Filter (OCB934RO T33) - Replace every 6-12 months or as needed
- STAGE 3 - 1x Carbon Block Pre-Filter (OMB934-5m) - Replace every 6-12 months or as needed
- STAGE 4 - 1x RO Membrane TLC 50 GPD (200359) - Replace every 24 months
- STAGE 5 - 1x Inline Carbon Post Filter 2" x 10" (K2533-JJ) - Replace every 6-12 months or as needed
We offer two replacement filter kits so you can get exactly what you need — and avoid paying for filters you don’t.
-
Year 1 Kit (Includes RO Membrane) available on this page:
Ideal for your first full replacement, this kit includes all filters plus the RO membrane, which typically lasts up to 24 months. -
Year 2 Kit (Without RO Membrane):
After the first year, you only need to replace the pre-filters and post-filter, since the RO membrane is still good for another year. This kit helps you save money while keeping your system performing like new.
*Filters may need to be replaced more often than indicated depending on water contaminant levels and volume of water being treated.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 874 reviews
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Product Reviews
★★★★★ 5
Great book for learning about startup culture.
Format: Paperback, Format: Paperback
I had this book for a while did not have the chance to read as soon as I got it. Recently finished reading it and learned a lot of great things about startup terminology and how to be fast and how to iterate things in a right way, how to go deep in the problem. Identify pain points for the problem etc. Overall great teacher for anybody who wants to get grasp of a being in startup world.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
★★★★★ 5
Solid advice
Format: Paperback
Nice foundational advice to help one stay motivated and not so overwhelmed.
Good read!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026
★★★★★ 5
Learning Faster, Failing Smarter
Format: Paperback
This book is truly amazing. Each chapter offers so much to learn. It helped me review what I’ve missed so far, anticipate future challenges, and prepare ways to reduce the chances of failure.
It reminded me that failure is inevitable, but the speed of learning, adapting, and retrying makes all the difference. I learned that luck comes through action, ownership is everything, and true success lies in persistence and focus. The book also emphasizes solving real problems with humility, data, and continuous iteration. I’m truly grateful to have found this book — it changed the way I think about challenges and growth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 13, 2025
★★★★★ 5
You NEED this book!!
Format: Kindle
If you are involved in a startup, or thinking about getting involved this is a must read. Jame's doesn't just rely on his own experience, he has been advising founders for years and does this with close relationships, not boardroom pontification. His blunt approach is balanced with his caring critiques. You can read dozens of books on startups and find out, when you actually are in one, how little applies to you. This is not that. Must read!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 1, 2025
★★★★★ 4
Excellent book with a lot of solid advice
Format: Kindle
I thought this was an excellent book. It gave great advice that I found really helpful in thinking about and planning my startup, as many of the other comments have noted. The key ideas as far as I remember are that a) you should talk to as many potential users as you can and find out what their problems are, and b) be laser-focused on solving those problems instead of building what it is you want to build, because the thing you want to create might not be the thing that they want to buy. In fact I did just that; I talked with just one potential user and found that what I had thought would be their big problem wasn't a problem at all for them, and looking at some hard numbers as he advises, it isn't a problem for the industry as a whole, either. I had to go back and reformulate my approach. I now have a 100% better value proposition for them.
Just two words of caution:
1) The book assumes that your startup is an app of some sort. Much of what he's talking about is therefore specific to the tech business. Mine isn't. Mine is a real product that people can hold in their hands. That wasn't a deal breaker by any means as most of the lessons in the book are still applicable to my product and what I'm doing. Still, it would've been nice of him to acknowledge that someone's start-up may be a lemonade stand or something material and concrete like that.
2) Is the vulger language necessary? I mean, English isn't like some other languages where there's an enormous difference between the way a language is written and the way it's spoken, but still, do we need so many obscenities in a book on business? It reads in some places like you're in a bar with a tech bro who's had a few drinks and is lambasting your approach to your business. I could've done without all the four-letter-words. But maybe that's just my generation.
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Reviewed in the United States on November 2, 2025
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