Culligan FM-15A vs Brita Longlast Water Filter
Side-by-side comparison of features, pricing, ratings, and alternatives.

The Culligan FM-15A is a compact, under‑sink filtration system designed for residential use. It combines multiple filtration stages to reduce chlorine, lead, cysts, and other common contaminants, providing clean, great‑tasting water straight from the tap. Installation is straightforward, and the unit fits in tight spaces without sacrificing performance. It’s ideal for households that want reliable, low‑maintenance water treatment without a whole‑house system.
The Brita Longlast Water Filter is a high-capacity replacement cartridge designed for Brita pitchers and dispensers. It provides up to six months of filtration, removing lead, chlorine, and other contaminants while preserving essential minerals for better taste. Ideal for households and offices, the Longlast filter offers a cost-effective solution to reduce bottled‑water waste and improve hydration quality without the need for electricity or complex installation.
- Effective contaminant reduction
- Compact under‑sink installation
- No electricity required
- Simple filter replacement
- Long lifespan reduces replacement frequency
- Effective lead and chlorine removal
- Fits all Brita pitcher models
- No power or plumbing required
- Limited capacity requires periodic cartridge changes
- Initial cost higher than basic pitcher filters
- Only serves a single faucet
- Higher upfront cost than standard filters
- Only compatible with Brita brand pitchers
- No smart connectivity features
- Replacement cartridges must be purchased separately
More alternatives & similar tools
Alternatives to Culligan FM-15A
View all →Long-lasting filter that reduces lead and chlorine for great-tasting water
Whole‑house filtration that removes chlorine, lead, and PFOA/PFOS for cleaner water everywhere
Alternatives to Brita Longlast Water Filter
View all →Whole‑house filtration that removes chlorine, lead, and PFOA/PFOS for cleaner water everywhere

Compact under‑sink water filter delivering great‑tasting, contaminant‑free water
The Verdict
AI-generated from listing dataBrita Longlast offers low‑cost, portable pitcher filtration with long cartridge life, while Culligan FM-15A provides higher‑capacity, under‑sink filtration at a premium price.
Key differences
- •Installation: Brita is a snap‑in pitcher filter; Culligan requires under‑sink mounting.
- •Capacity & lifespan: Brita delivers ~150 gal (≈6 months) per cartridge; Culligan’s cartridge life is not quantified but is described as limited and needs more frequent changes.
- •Price: Brita cartridge costs $29.99; Culligan system costs $399 upfront.
- •Fit: Brita works only with Brita pitchers; Culligan serves a single faucet under the sink.
- •Footprint: Brita occupies countertop space; Culligan occupies 12×6×10 in under‑sink space.
Pricing & value
Brita costs $29.99 versus Culligan’s $399, giving far lower upfront expense.
Capacity & running cost
Brita provides up to 150 gal (≈6 months) per cartridge; Culligan’s cartridge life is unspecified and described as limited.
Installation & space
Culligan fits under a standard sink (12×6×10 in) while Brita requires countertop space and pitcher compatibility.
Ease of maintenance
Both use simple cartridge swaps without tools; Brita snap‑in, Culligan under‑sink swap under 5 minutes.
Features
Culligan includes a filter‑life indicator and dual‑cartridge sediment + carbon system; Brita lacks smart features.
Warranty
Both offer a 1‑year warranty (Brita standard, Culligan limited).
Energy efficiency
Neither requires electricity; both operate solely on water pressure or gravity.
Choose Culligan FM-15A if…
Homeowners with under‑sink space who prefer a dedicated faucet filter despite higher cost.
Choose Brita Longlast Water Filter if…
Renters or small households wanting affordable, portable pitcher filtration.
Common questions
Which system costs less to start using?
Brita Longlast costs $29.99 for the cartridge; Culligan FM-15A costs $399 for the whole unit.
Can I install the filter myself without plumbing?
Brita is a snap‑in pitcher filter requiring no plumbing; Culligan must be mounted under a sink but also needs no electricity.
How often do I need to replace the cartridges?
Brita’s cartridge lasts about 150 gal (≈6 months); Culligan’s cartridge life is not specified but is noted as limited and requires periodic changes.

