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Input:
Question: Will the 3US-PF01 filter work on the 3US-AF01 system?
Document: I started out with the Standard 3US-AF01 filter. Flow was great, with very little drop in water pressure, even after 6 months on well water. It was pampered a bit since the well water first goes through a 1-5 micro whole house filter before it gets to the kitchen.I was not prepared for the very noticeable drop in water pressure when I just switched to this Advanced 3US-PF01 filter.
I had to do more research than I felt was necessary to actually figure out what I was buying and if it would work with the filter holder/filter set I bought at Wally World. So, being the nice guy that I am, I'll post it so you can make a better informed buying decision..The 3M Filtrete 3US-PF01 is the advanced replacement filter cartridge designed to fit Filtrete Systems 3US-AS01, 3US-PS01 and Whirlpool Systems WHCF-SUF, WHCF-SUFC.
This filter does it all and when used for drinking and cooking water lasts even longer than the claims made for it. The filtrete system including the 3US-PF01 filter quickly installed under the sink and hooked up to the Kohler faucet.When Colorado had fires and resulting  ash that affected many peoples drinking water, we noticed no difference in taste or clarity as did some of our neighbors. I am just now replacing our 3US-PF01 filter for the first time after less than one year of use.
No more bottled water. These replacement filters work with the Filtrete Under-Sink Advanced Water Filtration System (3US-PS01). Once you have the system installed then with a simple push up & 1/4 turn you can replace the used filter with a new one. Replace every 6 months or 200 gallons. I set them up to be Amazon auto-sent every six months so I don't forget. The tap water from our local water board always had a chemical taste to me.
alternative filter (3US-AF01) also useful, but does NOT microbials.
Filtrete Under-Sink Advanced Replacement Water Filter (3US-PF01) 3M always have good water without shopping for filters at the last moment auto delivery great idea
Purchased the 3M Filtrete 3US-PF01 Under-Sink Advanced Replacement Water Filter to replace the existing filter in our new home as I had no idea how long the previous one had been installed. Uninstall and install was nice and simple, with almost no leaking during removal. Highly recommend.
The Filtrete water filter 3US-PF01 is a good compromise for me. I have used it for about 2 years. It does a good job reducing the chlorine taste and will last for up to 6 months depending on water volume. The flow rate of about .5 gal/minute is a bit slower than some but worth the few extra seconds wait.
This type of Filter 3US-PF01 is so easy to use that ANYONE can do it. I have two of these installed. One for a commercial ice maker and one for drinking water. Water quality is EXCELLENT!! !For years I used the typical canister with replacement internal filter as that was all that was available. Changing it was a chore as the canister had to be washed and sterilized every time.
This is my third purchase of this 3M Flitrete filter (3US-PF01).All three have worked perfectly. The water tastes and looks great.The filters have not suffered restricted flow or leaks.I use these filters on a bar sink, so they "time-out" on the 6-month interval before reaching end-of-life on the rated water capacity of 2,000 gallons.
Answer: Your question is fundamentally wrong- 3US-PF01 and 3US-AF01 are both filters! But they both will fit 3US-AS01 system if that what you meant in your question.