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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

  • Based on 1,055 reviews
Condition: New
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon

Arrives Thursday, Jun 26
Order within 6 hours and 27 minutes
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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.

Material: Brass, Resin


Product Dimensions: 2.5"D x 12"W x 2.5"H


Item Weight: 1.5 Pounds


External Testing Certification: NSF, WRAS


Product Benefits: Delivers spot-free rinse with ultra-pure demineralized water


Material: Brass, Resin


Product Dimensions: 2.5"D x 12"W x 2.5"H


Item Weight: 1.5 Pounds


External Testing Certification: NSF, WRAS


Product Benefits: Delivers spot-free rinse with ultra-pure demineralized water


Brand: WaterSentinel


UPC: 857797008272


Unit Count: 1 Count


Number of Items: 2


Item Weight: 1.54 pounds


Manufacturer: Aquamor, LLC


Country of Origin: USA


Item model number: SF-20W


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jun 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews


  • VERY helpful for washing cars!
Item Package Quantity: 1
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. ... show more
Reviewed in the United States on August 8, 2021 by Hawk eye

  • Really does eliminate water spots on my car
Item Package Quantity: 1
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. ... show more
Reviewed in the United States on May 11, 2021 by fsgregs

  • So far so good
Item Package Quantity: 1
I’ve only used it twice and it rinses my car great…at least if I’m thorough with the rinse. I don’t know how many washings I’ll get. I figure one more and I’ll be on the plus side relative to a car wash. The extension hose that came with it is crap. It cannot be connected so to not leak between the metal ferrel and the associated hose. Not talking about the connections ends. . Don’t really need the hose anyway. ... show more
Reviewed in the United States on April 26, 2025 by Amazon Customer

  • Do not buy!!
Item Package Quantity: 1
Do not buy!! Junk! Leaves more spots than without it. Only used one partial time...leaks at all fittings. Yes I put my water at the lowest setting, just barely cracked the spigot. I have a well and this does NOT do it. Better off with an RV camper filter. I put a used one of those and it is better than this POS. ... show more
Reviewed in the United States on June 3, 2025 by Steve G.

  • Hose Extension Does Not Work
Item Package Quantity: 1
Filter seems to mostly prevent water spots when used to rinse my car after washing. But as others have stated, the included hose extension is junk. It sprays water like a shower head. 🚿
Reviewed in the United States on May 1, 2025 by Larry W

  • Works great
Item Package Quantity: 1
I recently bought a Black Ford F-150, the pollen and dust has been terrible this year. I was spending 20$ a week at the car wash so I decided to buy a power washer. After the first wash at home the mineral deposits on the truck made it look like I washed it at a chalk factory, white spots all over the truck. I ordered the filter and attached it to my power washer. After washing I was amazed at well the filter worked. Live in north east Pennsylvania and water is from a well, lots lf lime and other hard minerals in the water. I will definitely reorder this filter. Used it once so far so I'm not sure how long it will last but definitely worth the price. Sorry for not posting any pictures of the first wash without the filter ... show more
Reviewed in the United States on May 20, 2023 by Brian Miller Brian Miller

  • Works well
Item Package Quantity: 1
Bought to rinse solar panels. Leaves the glass streak-free. Makes things easy. The included flexible bit is somewhat janky but I bought a pair of similar connectors that do work well. I’ve only used it once to rinse 30-odd panels and it’s unclear how much life I can get out of one cartridge. I’m sure I’ll eventually discover the answer to that extistential question. ... show more
Reviewed in the United States on September 7, 2024 by ForgetIt

  • Filter works hose bad
Item Package Quantity: 1
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

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