PUR PFM100B Horizontal Faucet Mount Water Filter
- 100 gallons or 3 months of regular use per filter
- 70 substances reduced, including lead, WQA and NSF certified
- NSF certified to reduce microplastics
- External aerator faucets only, no pull-out or internal aerator
- Filter change light on the unit
- Tool-free install, on/off lever for filtered water
- 1 genuine PUR filter included
- 1000 ppm max TDS supported
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Recommended for drinking water from a standard faucet with an outside aerator; it will not mount on pull-out faucets, and it does not filter microbes.
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ASIN: B01KWRBFPOModel: PFM100Category: Faucet Mount Filters
Overview
A renter or homeowner who wants filtered drinking water straight from the tap gets a horizontal PUR unit that threads onto the faucet without tools. An on/off lever switches between filtered and unfiltered flow, and a light signals when the filter is due.
Certified reduction of lead and microplastics at the tap, with a lever to switch back to plain tap water, makes this practical for daily use. Faucet fit is the limit: pull-out heads and internal aerators are out, and only genuine PUR filters are certified for it. Microbes are not filtered.
Who it's for
Apartment and home kitchens with a fixed spout suit it, since it threads on and comes off without tools. Homes that need microbes removed from their water should look at a different system.
Pros and cons
- Lead and microplastics reduction certified
- Tool-free threaded installation
- Lever switches filtered and unfiltered flow
- Change light signals filter replacement
- Won't fit pull-out or internal aerator faucets
- Does not filter microbes
- Only genuine PUR filters certified
- Flow rate not listed
Performance notes
Water is filtered only while the lever routes flow through the cartridge, which uses ion exchange among its methods. Cartridge life is counted by volume and time, and the change light tracks it. A clean, undamaged external aerator thread decides whether the mount seals.
Specifications
| Brand | PUR |
|---|---|
| Model | PFM100 |
| Dimensions & fit | |
| Item Weight | 1.2 pounds |
| Item Dimensions L X W X H | 7.3 × 3.2 × 7.7 inches |
| Capacity & performance | |
| Filter Life Cycle | 3 months |
| Capacity | 100 gallons |
| Power & efficiency | |
| Power Source | Manual |
| Construction & materials | |
| Material Type | Plastic |
| Compatibility & installation | |
| Installation Type | Single Hole |
| Included components | |
| Unit Count | 1 |
| Number Of Packs | 1 |
| Included Components | Faucet Mount & Filter |
| Warranty & support | |
| Supported Water Tds Level Maximum Ppm | 1000 |
| Other details | |
| Purification Method | Ion Exchange |
| Container Type | Mount |
| Number Of Items | 1 |
| Other Special Features Of The Product | Lead Free |
| Part Number | PFM100B |
| Eu Spare Part Availability Duration | 0.2 years |
| Item Type Name | Faucet Filtration System |
Frequently asked questions
How do I install the PUR PFM100B faucet filter?
No tools are needed: thread the system onto the faucet. It needs a standard faucet with a visible, external aerator.
Does the PUR PFM100B remove bacteria or other microbes?
No. PUR states it does not filter microbes.
Which replacement filters work in the PUR PFM100B?
Genuine PUR Faucet Mount Replacement Filters. PUR says only these are certified to work with this system.
Can I still get unfiltered water with the PFM100B attached?
Yes. The on/off lever switches between non-filtered and filtered water.