Watts 20,000 gal. In-Line Water Filter Kit-IL-20K - The Home Depot


Model # IL-20K

Internet # 100678548

Store SKU # 788033

20,000 gal. In-Line Water Filter Kit

Watts 20,000 gal. In-Line Water Filter Kit

This item has been discontinued.
The Home Depot no longer carries this specific product.

$29.99 / each
  • Reduces scale build-up in appliances and up to 99% of lead
  • Carbon-spun fiber filtration system
  • Easy to install for both contractors and homeowners


Model # IL-20K

Internet # 100678548

Store SKU # 788033

For better tasting water, use the Watts 20,000-Gal. In-Line Water Filter Kit, designed to reduce chlorine and odors from your water and improve its taste. Use it in refrigerators, ice makers, under sink filters and beverage dispensers. It is also formulated to reduce some heavy metals and scale build-up in appliances. It installs easily for either the contractor or homeowner.

  • Constructed of plastic
  • Reduces up to 99% of chlorine and odors for better tasting drinking water
  • Designed to last for as long as 5 years so you don't have to fuss with more frequent filter replacement
  • Recommended uses are: refrigerators, ice makers, beverage dispensers and under sink filters
  • NSF-certified
  • Includes 1 filter

Info & Guides

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Assembled Depth (in.)  3 in  Assembled Height (in.)  8.5 in 
Assembled Width (in.)  3 in  Product Depth (in.)  14.062 
Product Height (in.)  2.75  Product Width (in.)  6.25 
Accessory Type  Filter Replacement  Brand/Model Compatibility  Watts 
Filtration method  Carbon Spun Fiber  Product Weight (lb.)  2.17 lb 
Returnable  90-Day  Twist and lock design  No 
Water filter system type  Under sink 
Warranty / Certifications
Manufacturer Warranty  Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. 


Rated 4.2 out of 5 by 50 reviewers.
Rated 4.0 out of 5.0 by workhorse of a filter This is a good, solid, workhorse of a filter. I have these installed on two commercial grade ice machines used in residential settings. I recently had to replace the 1st one installed in late 2010 after it clogged. So I got 70-80% of the estimated lifetime. Guess it'd be nice if there was an indicator to show how much filtering capability is available... Also, it'd be good if it filtered smaller particles. There is sediment and rust at one of the locations that obviously makes it through the filter and shows up in the machine. June 3, 2014
Rated 2.0 out of 5.0 by Worked while it lasted We bought our house in May and we pitched filter pitcher in the move. Installed a drinking water faucet in place of the sprayer nozzle and added this 5 year filter for 30 bucks over the $20 - 3 month version. By late November the flow was intermittently slow. We have great water but our municipality adds just enough chlorine to affect the taste so the filter isn't working hard by any means. Flow was bad enough to make me pull it, and I found the feed line plugged solid. At first I thought the sediment was from the lines in our 40 yr old house, but it was the interior of the filter disintegrating. I don't think I'll be installing another one. December 23, 2014
Rated 5.0 out of 5.0 by Great tasting water and ice for the price! Great price when you buy the kit that includes the filter, saddle valve, and both hoses. Very easy install too. I just hope it last the five years as promised. I recommend this filter to any household. January 19, 2013
Rated 5.0 out of 5.0 by great filter Looks like i want have to change filters for about 5 years :-) January 20, 2015
Rated 5.0 out of 5.0 by Watts 5 yr 20K in-line water filter Easy to install. Does not leave sediment. Water tastes great. This was installed as a replacement for Argenion 5 yr filter. Fittings were the same. Purchased at local Home Depot. Did not use kit. Simply replaced filter. August 26, 2014
Rated 1.0 out of 5.0 by Doesn't work Very easy to install. However, water still tastes bad and leaves sediment behind. March 16, 2015
Rated 5.0 out of 5.0 by In-line water Filter for fridge ice maker This filter is rated to last 5 years. Not sure if the couplings and connectors to the filter will last that long. If they last that will mean that I don't have to change the filter annually. October 21, 2014
Rated 4.0 out of 5.0 by Good filter for fridge ice maker & water dispenser I have had this filter for over 4 years now & it's time to replace it. It didn't last the 5 years but I have 3 kids who use alot of ice and water from the fridge. This filter definately improved the taste & smell of the ice. It isn't as good as our RO filter at the sink but it was much better than the previous 1 yr in-line filter we replaced. I am very sensitive to smell and couldn't stand to use our ice before getting this filter. I normally make tea, lemonade, etc.. using RO filtered water, so when I used ice from the fridge I could definetely smell the ice. When we installed this Watt's filter the smell was greatly improved. We never had a plastic taste. I am definely going to purchase this filter again! April 22, 2012
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