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Watts 500315 Counter-Top Drinking Water Filter

4.2 out of 5 stars 259 customer reviews
| 41 answered questions

Price: $45.00 & FREE Shipping on orders over $49. Details
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  • Reduces chlorine taste and odor, sand, silt, sediment, and rust
  • Portable; operates by use of a diverter valve attached to the main sink faucet
  • Fits on to small areas on the counter top
  • Meets all plumbing codes
  • Accepts all standard 10-inch replacement filter elements
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Frequently Bought Together

  • Watts 500315 Counter-Top Drinking Water Filter
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Total price: $73.19
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Product Description

Product Description

500315 Home water treatment condensed in to one complete easy-to-install package. Through its simple connection directly to your kitchen faucet aerator, installation is a snap. Combined with its high quality coconut shell carbon filter, this is a great product for busy families on the go. Capable of being used in the home, RV or camper, this portable Reverse Osmosis system ensures high quality drinking water wherever you go. Also perfect for apartments or rentals since installation is directly to the kitchen tap aerator. Features: -Water filter. -Works perfectly in low pressure applications. -Portable, operating by use of a diverter valve attached to the main sink faucet. -Reduces sand, silt, sediment, rust, chloramine, chlorine taste, and odor. -Fits on to small areas on the counter top. -Accepts all watts standard 10-inch replacement filter elements, for simple, easy to find replacement filters. -Product comes with everything needed to install to your kitchen tap. -Includes all parts and tubing to install directly to your kitchen tap. -Assembly required. -Overall dimensions: 16'' H x 6'' W x 4'' D. For more information on this product please view the Sheet below: Manual sheet


Thanks to a certified coconut-shell carbon block, the Watts Premier CT-1 Counter Top Water Filtration Device turns tap water into cleaner, healthier drinking water. The Watts CT-1 is perfect for campers, RVs, apartments, and houses, providing exceptional value with its high-quality carbon filtration. And installation takes only a few minutes, as the system connects directly to your existing kitchen tap.

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High-quality carbon filtration provides cleaner water straight from the tap.

During the lifecycle of a single filter, you can save up to 16,000 plastic bottles from being deposited in landfills.
Cleaner Water Straight from the Tap
The Watts CT-1 effectively removes sand, silt, sediment, and rust from your drinking water. It also reduces the taste and odor of chlorine, so you can enjoy water straight from the tap and save yourself the expense of buying bottled water.

Portable and Easy to Install
Installing the Watts CT-1 is a breeze. The unit occupies a small area on the countertop beside your sink, attaching to the faucet by way of a diverter valve. Installing the CT-1 is so easy that most users can filter their tap water in a matter of minutes. The quick installation also means that the CT-1 can be moved from sink to sink with ease. In particular, users of campers or RVs will appreciate the simplicity with which the unit can be moved from one place to another.

Universal Parts for Easy Replacement
The CT-1 accepts all Watts standard 10-inch replacement filter elements. So when it's time for a new filter, you can rest assured that you'll find all the right parts.

The Importance of Drinking Clean Water
Water is critical to proper food digestion, kidney health, brain function, blood health, joint functionality, and more. It's important to make sure that the water you drink is devoid of contaminants. Thankfully, using a Watts water filtration device will ensure consistent quality for all of your drinking and cooking needs. In fact, when you use Watts' high-quality certified water treatment devices and filters, your water will be free of chlorine taste and odors, particles, and many other contaminants that can be detrimental to your health.

*Please refer to the Performance Data Sheet for the complete list of claims for which this system is certified.

An Choice
Not only is the CT-1 filter a healthy choice for you, but it's also a healthy choice for the environment. This filter helps you minimize the harmful environmental consequences of buying bottled water. Incredibly, if a mere ten percent of North America's bottled water intake were reduced by switching to home-filtered water in reusable containers, we could eliminate:

  • 133,000 trucks driving an average of 500 miles--saving nearly 12 million gallons of diesel fuel
  • Over 100 million pounds of greenhouse gasses--equal to taking 1,100 cars off the road annually
  • 213 million pounds of PET--equal to 1.5 million barrels of crude oil or improving the PET recycling rate by 10%

Depending upon which Watts water-filtration product you use, you can prevent up to 16,000 half-liter bottles from being deposited in landfills--all in the time it takes to use and replace a single filter.

The Watts Premier CT-1 Counter Top Water Filtration Device is backed by a one-year limited warranty.

What's in the Box
CT-1 Filter unit, including filter housing with countertop stand, dispensing spout, diverter valve, tubing for installation, and manual.

Compare Water Filtration Devices





Num. of Filtration Stages122335
Arsenic, Nitrates,   
Chrome, TDS,   
Perchlorate, Turbidity   
Dimensions (L x W x H)6 x 6 x 1414 x 6 x 1614 x 6 x 169 x 3.5 x 146 x 4 x 1617 x 17 x 6
Replacement Filters5-Mic Carbon BlockPurifier Filter Pack560088560039560017Annual Filter Pack

Product Information

Technical Details

Part Number CT-1
Item Weight 3.1 pounds
Product Dimensions 4 x 6 x 16 inches
California residents Click here for Proposition 65 warning
Item model number 500315
Color White, Silver
Item Package Quantity 1
Batteries Included? No
Batteries Required? No
Warranty Description 1 year

Technical Specification

Additional Information

Customer Reviews
4.2 out of 5 stars 259 customer reviews

4.2 out of 5 stars
Best Sellers Rank #30,601 in Home Improvements (See top 100)
#363 in Home & Kitchen > Kitchen & Dining > Water Coolers & Filters > Replacement Water Filters
Shipping Weight 3.1 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available May 14, 2008

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By C. Mems on July 3, 2011
Verified Purchase
Length: 2:10 Mins
This water filter is nice and VERY Easy to Install!! as for the hard to open I bought the
Watts wr-100 water filter wrench here on Amazon for 7.54 it opens ver easy with the correct tool.
The water taste very good and Clean!! I bought this for my son who lives in L.A. for $29.00
you can not beat the price and the cost of replacement filter at $10.00 what a deal!!!
I paid over $1.200.00 for the AQ-500 water ionzer. and after a year it clogged up on me.
it is under warranty but for the price!! the AQ water does taste better
but not by much for the price. as for the Health benifits of ionzed water Have yet to see it!
If I had to do it over again I would save the 1,150.00 and just buy this unit!!.
I still might buy one as a back-up for my own house!!
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Verified Purchase

Just moved to a new town. Anywhere else around the area, my Britta would clean up the taste of bad water, but not here. Here it's SO chlorinated, I needed something better.

After a lot of reading and research I was down to the Filtrete Under-the-counter unit and this unit. The Filtrete pro sounded like it had a strong flow and filtered down to .5, but after looking at it closer, it would be just my luck to have a connector pop out and cause water damage without me around. So, I decided on this.

I had it connected in under 5 minutes. I just needed a pair of pliers to loosen the faucet part which needed to be removed. The unit came with a needed adapter which worked perfect. I turned it on and after letting it run for a few minutes, I tried the water. AWESOME!!! Clorine smell and taste was GONE!

This thing works, and works well and I don't have to worry about broken lines under the sink. The water flow remains good through the unit as well. I can also find many options in replacement filters because of its standard size. I love the quality and functionality of this unit.


The problem was, upon closer inspection, there was a small bead of water coming from the units water output. At the bottom of the metal output piece (Which you can just pull out) there are 2 small, round O-rings, and one was pertruding. It was cracked, so only one O-ring was ok, and when I moved the water output, it beaded up.

I called the "Manufacturer", which sounds like it isn't REALLY the manufacture, but a distributor, and was told they don't have any parts, they get the unit assembled. The parts they DO carry they said, are all given to Amazon. SO.... they told me I should pack it back up, and send it back to Amazon.
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Verified Purchase
This unit is just what one would expect. There's nothing fancy here, just a good solid unit. Installation was easy. The unit came with a couple adapters so that it should fit most faucets. No tools were required to hook it up. The diverter valve is a little nicer than I've seen on some units.

The only downside is a trait which is shared with all counter-top filters and that is that it takes countertop space and can be knocked over if one is careless.

For the price and Amazon free shipping, I'd be hard-presed to find a better unit.
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Verified Purchase
I purchased this product in April of 2009 and I can say that out of the numerous water filtration devices that I have purchased over the past 3 years, this one is the simplest and most convenient to use and provides great tasting water instantly without having to wait for the water to filter through a pitcher.

I live in an apartment complex and I've had to move four times over the past two years due to different circumstances. Installing this countertop device has made it so much easier for me to disconnect/reconnect and move it with me with ease. I worked with my dad to install a 5 stage reverse osmosis system at his house underneath his sink and it was a very tedious process. Not only that but he has to get down there every six months to change several filters. I did not want to this given that I rent a place and move frequently and the complexity of the installation of an R.O. system. With this filter, it makes a simple connection directly to the faucet and I only need to pull a pin to transfer the water through the filter. My dad's R.O. system also has a 3-5 gallon container to store the filtered water in but the water pressure coming out of the faucet is great at the beginning but near the end of a gallon, the water is trickling very slowly due to diminished water pressure. It will take him 4-5 minutes to fill a gallon jug of filtered water. This is not true with my countertop filter, If I turn up the water faucet pressure, the water comes out faster, and if I turn it down, it comes out slower. It doesn't take me more than 45 seconds to fill a gallon of filtered water into a pitcher, which I then store in the refrigerator or put directly into a glass with ice for instant cold drinking water.
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By dandi on December 22, 2009
Verified Purchase
This filter is fast, and I'm glad to have found a counter top filter system.

The down side? I struggled to open the system to install a filter. The design is very, very poor since there is very little to grasp onto without damaging the exterior of the filter.
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