Culligan D-20A Drinking Water Replacement Cartridge Save 9% Off

• Reduces chlorine taste and odor
• NSF Certified with a 2 year warranty
• Filter life up to 12 months or 1000 gallons
• Granular activated carbon cartridge
• Recommended for use with city and well water supplies

I bought this as a replacement for a D20 filter in my RO-3167. The package I got from amazon had a product sheet inside that was marked "D20" but a factory sticker on top of the plastic wrap said D20A.

It''s the best activated carbon filter for multi-stage reverse osmosis (RO) systems. It''s made in USA. I have been using them for at least 10 years. You need to thoroughly follow the instructions for replacing filters, sanitizing your filtration system and priming the system after filter replacement. Failure to follow all these procedures will result in unpleasant odors, sediment or carbon dust in your water. Also for RO filters, it is recommended to let water flow from filter faucet for 10-20 seconds before using water for drinking purposes.

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I am very disappointed with the filters. I don''t know if maybe they were old or what but within 1 month of installing the new filter, the water had a bad smell to it and a bitter taste. I will not buy this product again.

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The plastic plug installed to keep the charcoal inside the filter came loose and the charcoal came out and plugged the valve body in my sink faucet and ruined it.

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Provides higher flow rate than higher rated products and tighter filters for same flow on filtered water as hot/non filtered water. Water tastes great and has no aftertaste. More than ample filter for home use.

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I don''t know why, but this D-20A filter is not working as well as the D-20 (which I cannot find anywhere). My well water still has that ''boiled egg'' smell and now (this was not happening prior to putting in this filter)there are tiny flecks of black ''stuff'' in the water, which I believe may be particles of the charcoal filter. Very disappointed as they were a great price. I''ll try my local hardware again as they seem to work well. Going to have to cancel my renewable order through Amazon. Very disappointed.