WaterSentinel SF-20W Spotless Car Wash Inline Deionized Water Garden Hose Water Filter & Extension Adapter for RV, Boat, Marine, Motorcycle, Home, Windows, Spot Free Wash, Solar Panels
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Availability:
Only 1 left in stock, order soon!
Arrives
Tuesday, Nov 18
Item Package Quantity: 1
Features
- Heavy Duty Design: Proudly Made In The USA, brass crimped end to end, lead free, internal tight seal gasket. Reusable blue filter caps(end to end) to preserve resin for freshness. Braided and reinforced transparent flex hose extension.
- Superior Filtration Technology: High quality filtration technology applied by a using sediment pack on inlet and outlet to reduce chlorine, dust, rust, sand and silt.
- Special Formulated High Capacity DI Media: Using Premium Deionized media to dissolve ions for mineral free water and achieve glossy spot-free finish on all types of vehicles such as: RV's, boat, marine, motorcycle, solar panels and even your home's windows. Also prevents scale spots caused by hard water by removing residual sodium ions unlike other products. For best results it is recommended to wipe-off any excess of water and let air-dry in the sun.
- Simple To Use: No bulky hardware, a compact plug & play design with no tools required for installation. Eliminates the need for large complicated systems. Use the Car Wash Filter and included Hose Extension right away. Fits standard 3/4" garden hose thread.
Brand: WaterSentinel
Item Weight: 1.5 Pounds
Model Name: SF-20W
Maximum Flow Rate: 0.5 Gallons Per Minute
Upper Temperature Rating: 100 Degrees Fahrenheit
Supported Water TDS Level Maximum (PPM): 5
UPC:
Manufacturer: Aquamor, LLC
Is Discontinued By Manufacturer : No
Product Dimensions : 12 x 2.5 x 2.5 inches; 1.54 Pounds
Item model number : SF-20W
Date First Available : April 28, 2020
Manufacturer : Aquamor, LLC
Best Sellers Rank: #49,618 in Automotive (See Top 100 in Automotive) #58 in RV Freshwater Filtration Systems & Parts
#58 in RV Freshwater Filtration Systems & Parts:
Customer Reviews: 3.9 3.9 out of 5 stars 1,093 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
The product itself works great, the little hose that comes with it? Not to much LOL! Just throw the little hose away and attach sprayer directly to this unit I have extremely hard water and this honestly made drying my car that much easier. Im sure if I didnt dry it I would have water spots regardless. Water leaves spots, period. But today I wasn't in a rush as per usual to get my car dried off immediately, I took my time and my car came out beautifully. I recommend this product100% but you do need to dry your car off for maximum results
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Reviewed in the United States on September 5, 2025 by grandmahodie
Years ago, my parents surprised me by buying me a Mr. Clean AutoDry kit. It came with the water gun, soap and a couple of filters. I used that set up for about 10 years before randomly shelving it. One day I broke it out, saw I was out of filters, went to buy more..... and discovered the product line was discontinued. I refuse to pay scalpers that are selling filters for the water gun, so I got rid of the kit, to the dismay of myself and my family members, who all used to have me wash their vehicles for them. As the years have gone by, we just go to the car wash. However, with my father finishing work on his freshly restored 1968 Z/28 Chevrolet Camaro and driving it around, we again have a need for a lower pressure water cleaning method for the car as he rightfully refuses to hit the car with a high pressure washer or take it through an automated car wash. This inline filter seemed the best avenue to go on, as the Mr. Clean AutoDry line shows no sign of revival. And I am very pleased to announce that this filter works ALMOST as well as the AutoDry gun did! Recently, due to some garage work, I had to leave my car, a 2011 Mazda3, parked outside. A brief, heavy rainstorm left my car completely covered in hard water spots. So I connected this filter to the hose tap, connected a hose to the other end of the filter, and literally just rinsed my car off. No soap, no wipedown, no drying, save for a short drive afterwards. This cleaned most of the water spotting off my car. Some spotting remains, but given I didn't use soap or wipe the car down, I was impressed. Encouraged by this, my father rolled the Camaro out. The car's front end was plastered with insect remains and he wanted to wax the paint. With my father rinsing, soaping, wiping and re-rinsing and me drying, we were able to get his Camaro (which is painted black!) very well cleaned up, with only a few very slight hard water drop stains on the paint. Waxing and polishing easily removed the spots. A crucial detail I forgot to discuss is water hardness. It may just be where we live, but our garden tap water is VERY hard, to the point drinking from a hose is discouraged. In the days of using my Mr. Clean AutoDry gun, one filter would last one to three washes, depending on the size of vehicle I washed and how dirty the vehicle was. So for this filter to remove so much of the minerals and other particles from the water is very impressive, and my father and I are very pleased with the results on our respective cars. So, that's one feature that I can't comment on...yet. I don't know how long this filter will last, given the hardness of our water. And as water conservation is being enforced where I live right now, my father and I will likely limit the use of garden tap water to watering the lawn, and with this filter, for only washing his Camaro when needed. However, unless the filter gives up the ghost very soon, I'll gladly buy another one when this one is used up.
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Reviewed in the United States on August 8, 2021 by Hawk eye
The product works great for spotless rinses of my vehicles. The flexible hose attachment is junk. Leaked at both crimped ends. Used the cartridge without the flex hose and it worked fine.
Reviewed in the United States on August 15, 2025 by JRB57
I didn't wash my old car much as it was, well....old. And it was also a brighter color. My brand new shiny sparkly black car was all water spots after my first wash and I didn't know I had water problems. I was skeptical but I tried this filter and after the first wash, it was absolutely spotless. What more can I say? It works!.............Update, so a month later I wash my car again and water spots everywhere. This filter seemed to work great the first time but I have to revise my review. It's supposed to give you about 20 washes. I even went back and rinsed it all again and water spots everywhere. Won't be buying this again.
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Reviewed in the United States on September 6, 2021 by BK63
2.5 stars is probably appropriate. There are two parts to this softener. The softener filter and the adapter. While you don't need the adapter, it is included so I'll rate each part. The softener seems to work fine. No complaints or concerns there. The adapter on the other hand leaked like a seive. The copper clamps holding the ends on, were not tight and lead to water flying out of every part of the hose. I had to scrap that part and just directly hook up the filter to the hose fitting. It wasn't the end of the world because I had the clearance, but just be cautious if you don't have room and need the adapter to make it fit in your application.
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Reviewed in the United States on July 14, 2025 by Brian D.
This filter is awesome. Not only does it leave a spot free rinse, we used it for our fresh water tank fill and we have real clear ice. I plan on purchasing several more.
Reviewed in the United States on October 13, 2025 by Robert
RI units by design, chemically remove excess minerals from water. When used, they theoretically should produce only de-mineralized water which when evaporated and dried naturally, should not leave water/mineral spots on my car after washing. Well, I tried it ... and it worked. I washed the car with my well water which has lots of minerals in it and always left my car full of minerals that I then had to manually wipe off ... a real pain in the butt. This time, I rinsed the soap off, and then quickly sprayed the entire car with this RI unit attached to my hose. Then, as a test, I let the water dry naturally. To my pleasant surprise, the water dried completely without spots. The car paint was spotless! No final wiping was needed. I don't know how long it will last but until it runs out of capacity, it works for me. It claims to last at least 40 gallons, which I estimate will be about 20 washings for me. To be effective, you cannot use too much of this water (2 gallons = about 1 minute of spraying my car), or it will run out of capacity fast, but 20 washings will last me at least a year. Not too bad a price for saving me a lot of manual labor drying off my car of mineral spots. So glad it worked.
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Reviewed in the United States on May 11, 2021 by fsgregs
Filter works. does what it claims. Hose connection does not work, using tape helps but still leaks, connections threads are too wide and therefore leak,, did not use the hose connector
Reviewed in the United States on April 10, 2025 by Pod Fix