Culligan FM-15A and FM-100 Faucet Water Filter Review

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Product: Culligan FM-15A and FM-100
Type: Faucet Water Filter
Filtration Stage: 1 Stage
Product Warranty: 2 Years
Suitable For: City Water Source, Rented Apartment

  • Reviews by Existing Customers
  • Filtration Effectiveness
  • Quality of the Product
  • Maintenance and Replacement
  • Installation Easiness
  • Cost Effective (Price/Value)


Culligan FM-15A and FM-100 are some of the best faucet water filters in the market. With its affordability and capability, there is no excuse for you for not having a water filter at home. It is RECOMMENDED!


Culligan is a well-established company which is specialized in water treatment products. They have been in the water filter business for more than 80 years. One of their best sellers are the faucet water filters.

Culligan Faucet Water Filter Review

Culligan has 2 separate models when it comes to the faucet water filter. There is a newer version which is the FM-100 series and the traditional version, FM-15A.

Both models are simple faucet mounted adapter water filters which are easily installed on a standard size faucets. In addition, they come in two variants, white or chrome finish.

Culligan FM-15A

Filters Particulates, Chlorine, Odor & Taste, Lead and other chemicals 

Flow Rate of 0.5GPM

200 Gallons or 2 Months per cartridge

Certified NSF International Standard

Culligan FM-100-C

Filters Particulates, Chlorine, Odor & Taste, Lead and other chemicals 

Flow Rate of 0.5GPM

200 Gallons or 2 Months per cartridge

Certified NSF International Standard

Filter Life Indicator

The newer model, FM-100 series comes with a filter life indicator which will send a reminder when it is time for a replacement.

Filtration Capability

Culligan FM-24 In the Box

Due to the size limitation, it is a 1 stage filtration system which uses premium carbon blocks filter.

Culligan claims that the advanced filtration filter will help to reduce the following contaminants:

  • Water cloudiness
  • Class 1 particulates (Size from 0.5 – 1 micron) 
  • Chemicals such as atrazine, chlorine, lindane, and lead
  • Bad taste and odor. 

The system is all tested and certified by NSF International against ANSI Standard 42 and 53. There is no claim on how well the filter is performing on removing the contaminants.

Although both FM-15A and FM-100 are using different cartridge code, the content and the filtration capability are the same.

You Don’t Need To Be a Plumber to Install

Installation for all of the faucet water filters is simple. You don’t need to hire a plumber or having any plumbing experience to do the job.

All you need is to screw the adapter to a standard size faucet.

*Note that the adaptor will not fit in dropdown faucets.  

Let the filter run for approximately 10 minutes whenever you are using a brand new cartridge. It will drain all the loose carbon out from the system.

The system equips with a diverted tabs which provide a quick switch between Culligan filtered water and regular tap water.

Maintenance and Replacement

Culligan FM-24 in the faucet

All faucet water filters are having a short lifespan of their filters. Every piece of the cartridge will only last for 200 gallons or approximately 2 months.

It is advisable by Culligan to make the replacement in order to enjoy the high quality filtered water from the system.

Annual Maintenance Cost: $70-85 for original cartridge from Culligan. 

There are some compatible filters on the market that are two times cheaper than the original cartridge, but it wears out quickly.

It is NOT advisable to purchase those cartridges as a replacement.

What’s Positive and What’s Negative?

+ Filter as small as 0.5-1 microns of sediment.
+ Life Indicator (Only for FM-100 Series)
+ Easy Installation filter that fits most of the faucet.
+ Certified by NSF against ANSI Standard 42 and 53.
+ Extremely portable with no tubing attached.
+ 2 years of long warranty period.
Short lifespan filters.
Pricy annual maintenance cost.
No digital meter for replacement reminder.
Not suitable for water source that is heavily contaminated.

Technical Specification

Product Dimension: 3.5 x 5.5 x 6.8 inches
Feed Water Pressure: 30-100PSi
Maximum Temperature: 40-100F
Maximum flow rate:  0.5GPM

Verdict: Recommended!

Expert View:

Culligan FM-15A and FM-100 Series are considered above average system among all faucet water filters for the few reasons below:

  • Certified NSF: Meeting the strict standards for NSF to ensure the system is safe to use and capable of reducing major contaminants in the water.
  • Small Micron Rating: It is certified to filter particulates which are as small as 0.5 microns.
  • Long Warranty Period: It covers up to 2 years warranty which is longer most of the faucet water filters.
  • Life Indicator: FM-100 comes with filter life indicator that reminds when the cartridge needed a replacement.

Where Can I Buy It? 

Check the latest price on my number one online trustworthy store, Amazon.


Culligan FM-15A Faucet Water Filter, White Finish


Culligan FM-100-C Faucet Water Filter, White Finish

Click on the button to get the recently updated price and find out the reviews of the product by all happy customers.

More Info and Question

The Culligan faucet water filter receives 3000 over reviews on Amazon. Here are some of the comments from those happy customers.

“I feel that this is one of the best water filtration systems on the market.”  –  Tall Paul

“It is PERFECT for just that, someone who can not drill holes into their countertops but need a good water filter system” – Robin P

“The design is much more compact, which is nice in a small sink” – Jessie G

Leave questions, doubts, and request in the comment below and we will get back to you at our earliest. I would love to hear what you think about this system.

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