Culligan D-30A Level 2 Drinking Water Replacement Cartridge

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.
Rating: 5 / 5

This product is the most cost effective among the Culligan home water filters. It last 1 year (or 1000 gallons) and performes well.
Rating: 4 / 5

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.
Rating: 2 / 5

I connected this to the cold water supply of my faucet before the water softener. I have VERY high iron and sulfur in my well water and this filter turns it into clear, fresh water with no detectable odor. It lasts for a very long time and just gets a bit slower with flow after a few months use. It has a flow restrictor built in and it takes probably 2 minutes to fill a gallon jug at 30 or 40 psi. This is a good feature in my experience since the other filters I tried without restriction worked for only a few days before forming channels through them where the unfiltered water would get through. If you need faster flow with this level of filtration, you will need to get a larger model or perhaps run multiple filters in parallel. I like this mounted filter much better than the popular pitcher based filters. It’s cheaper in the long run too.
Rating: 5 / 5

The filter is good. .5 micron is very good. The price is a little expensive.
Rating: 5 / 5