













💦 Elevate your wash game—spotless results that turn heads every time!
The iSpring FD25B Deionized Water Filter is a premium 4.5” x 20” cartridge designed to produce near-zero TDS water, perfect for achieving spotless, streak-free finishes on cars, boats, windows, and more. Compatible with standard housings and built to last up to 600 gallons or 120 rinses, it offers a cost-effective, easy-to-maintain solution backed by responsive customer support.



















| ASIN | B0BPK1BH1G |
| Best Sellers Rank | #56,866 in Automotive ( See Top 100 in Automotive ) #34 in Car Washing Applicators |
| Brand | iSpring |
| Date First Available | December 8, 2022 |
| Item Weight | 7.5 pounds |
| Item model number | FD25B |
| Manufacturer | iSpring Water Systems |
| Material | Resin |
| Number of Items | 1 |
| Product Benefits | Removes Impurities |
| Product Dimensions | 4.5"D x 4.5"W x 20"H |
| Set Name | WGB22BD |
| UPC | 810004173163 |
| Unit Count | 1.0 Count |
J**Y
Better window washing results than the professionals!
I should have bought this years ago. I used to hire professional window washers at $300-400 per visit. This iSpring unit made window washing a breeze and gave me a better outcome than the professionals...very effective. I was able to wash every window without squeegeeing at all. The result is a beautiful, spot-free window. Hands down the best value for the money, pays for itself in one use! It's compact in size and is easy to move around. Easy to operate and was leak-free! I like that the filter longevity will last me several years.
M**A
Great Product, Great Customer Service!
The iSpring Spotless Car Wash System (Model WGB22BD-BP) is a must-have for any car enthusiast. It delivers truly spotless, streak-free results thanks to the deionized water—no more water spots, even in direct sunlight! The bypass valve is a great touch, letting you easily switch between filtered and regular water. I did have a a couple hiccups with a few missing parts, but iSpring’s customer service was fantastic. Nick responded quickly and had the replacements shipped out immediately. His help was above and beyond what I expected—super professional and efficient. Great product, even better support. Highly recommend!
B**K
Finally! Soft Water for a spot-free carwash
Overall solid product. Generally detail cars using a 'rinseless' approach with distilled or DI water, and got tired of going to the local grocery for it. This system makes it way easier to source soft water, and is portable enough to be mobile. I am also able to use this in conjunction with my Ryoi pressure washer (1.8psi/1.2gpm) and do not experience any reduction in performance. Took me a few times using it to learn to drain the water/hose line AND 'de-pressurize' the containers before disconnecting things (water goes everywhere). I use quick connects on both sides for convenience. No leaks or drips.- everything connects and works as it should. During the install I ran into some challenges and called iSpring Water Customer Support. The support rep, Nick, was super helpful and took immediate action to help resolve (10/10 customer support, thanks Nick!!).
J**X
Read the chart, test your water do the math, if you do you will love the product.
We live in a wooded area and keeping windows clean to enjoy the views is greatly desired. The challenge is we have hard well water and the cost of professional cleaning is over $600 a time just for the outside. We bought Ispring and it worked wonderfully leaving no spots. While only getting one full house windows cleaned before needing filters it is still saving use thousands a year. Buy a water tester first and do the math. You may find like us this product is worth the money as we have.
A**R
Perfect for rinsing off house windows
Been using this for several months and although I like the iSpring for rinsing off my black truck after a washing, I tend to use it mostly for my home's windows. Yes, I wash my house windows more frequently than my truck...because "it's a truck"...dirt is good for it. I live in a *very* dusty and windy area. Folks out here are cleaning their windows every few weeks (or paying a professional every few months to do the same). Pulling screens and playing with ladders...no thanks. To keep my windows nice and clean in between annual deep cleans, I just wheel this out every other week and give the windows a quick rinse. Don't even need to take the screens off...dries without spotting/streaking and saves me time and money (no ladder required). Two thumbs up. The iSpring folks even called to follow-up on how I was liking the product and any thoughts I had about it's use. Very nice, US-based folks who speak plain English and are extremely helpful. -Ted T.
M**.
Not spotless 🫤
Followed the instructions to the letter and washed my car then rinsed. Spots especially on the windows and on the ppf. The box was badly damaged and one of the cylinders was scratched and the handle was ripped. So disappointed. I will be returning this product.
D**B
Resin only lasted 5 car washes, and the replacement cartridges are out of stock everywhere.
I used this filter 6 times, over a span of 1 year, and the resin is used up or has otherwise failed somehow. For the first 5 washes, it worked amazingly well with zero water spots and great flow rate. On the 6th wash, the water had a funky fish-like smell and the hard water spots are worse than if I didn't use the filter at all. $400 for 5 car washes is insane. Worse yet, even if I wanted to spend another $200 on replacement resin, there's no replacement resin cartridges available anywhere! Everyone is out of stock. I'm left with trying to disassemble the cartridges and hopefully refill them with 3rd party resin. Save your money and buy the name brand system; this one is not worth your money.
J**G
I had trouble with it, before Sean helped me
I use this product for work. When it works it works well. My home water is about 250 PPM and it gets it down to about 18 PPM. Good enough to not leave streaks or marks for the most part. Then it just stopped working on me and I have no idea why. It still came out of the machine at 250 roughly. I reached out of their support staff and after getting through to them Sean helped me out and sent replacement filters FOR FREE. He’s been very good at communicating with us and helping us out. Thank you Sean!!
Trustpilot
3 weeks ago
2 days ago