Culligan D-30A Level 2 Drinking Water Replacement Cartridge Save 20% Off

• Reduces greater than 99.95% Giardia and Cryptosporidium cysts
• Reduces asbestos, chlorine taste and odor, and sediment
• 0.5-micron (nominal) filtration
• Filter life up to 12 months or 1000 gallons
• Level 2 Extra Filtration

I''ve purchased the D40 filters in the past. They are good to reduce lead and other major contaminants in the water. However, the water flow is quite reduced due to the extra level of filtration. They only last for 4 months and the flow decreases as you use the D40.

In contrast, the D30 lasts 12 months, still has a great filtration profile, and the water flow is much faster and easier to cope with. In fact, I can hardly notice any difference between the hot water and the cold water now, compared with when I had the D40, and the cold water was annoyingly slow.

I recommend this filter over the more expensive D40 for everyday use, unless you have tested your water and found it to have lead. Then I''d use the D40 for health reasons, but not until then. There is no added benefit to the D40 in terms of water taste, or protection from microorganisms, compared with the D30.

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Culligan Drinking Water Replacement Cartridge Carbon Block, 0.5 Micron, 1,000 Gallon Capacity #D-30

The D-30 cartridge severely restricts water flow and nowhere on the packaging does it indicate this. I had to return them to amazon for a refund. Am using the D-10''s with no noticeable reduction in water flow/pressure. Suugest that Culligan come up with some indication of water flow for each of their water filters. If water flow is not an issue for you, then the D-30''s are probably fine.

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Culligan screwed this one up. The original D-30 worked perfectly with my new-ish (2009) under-sink filter housing. However, the D-30A leaks, makes a loud humming sound, and reduces the flow of water to a trickle. I cannot find ANY D-30''s anywhere, not at any of my local hardware stores, nor online. In desperation, I compared the new D-30A filter to the old D-30 filter I was replacing, and found that the hole in the top was significantly smaller in the new filter. I used a 5/32 drill bit to enlarge the hole (holding the filter upside down so plastic shavings would not fall into the filter) and installed it. Lo and behold, no more leaking, no more loud noise, and water flow is back to normal. My theory is they used a cheaper, less effective filtration material, so had to reduce the flow significantly in order to achieve the same filtration specs. This means I''m probably not getting the same level of filtration as before with the original filter, however I cannot taste the difference, and the alternative is replacing my Culligan filter with something else.

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This product is the most cost effective among the Culligan home water filters. It last 1 year (or 1000 gallons) and performes well.

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I upgraded from the previous D-20 filter that came with the original. It worked well. When I installed this filter, it reduced water flow and caused a loud whistling as water passed through it. I removed and replaced several times to purge air, no change. I noticed that the old filter had larger holes for the water to pass through. I may have reduced the efficiency, but to achieve water flow without the noise I drilled several small holes to increase the outflow. Works fine, full flow and no noise now. Will buy D-20 next time.