SLF Water Filtration Comparison · 2026
Frizzlife MK99
Recommended for shoppers wanting an inexpensive, high-flow alternative to reverse osmosis for treated municipal water.
Frizzlife SP99
Recommended for families and homeowners who want fast, everyday under-sink filtration through a dedicated faucet without paying for a reverse-osmosis system. It is particularly compelling for lead, chlorine, taste, and odor concerns, while its replaceable inner cores help keep annual maintenance costs manageable.
Frizzlife MK99
Choose MK99 for 2 GPM flow, low-cost cartridges and mineral retention; choose Waterdrop 15UA for a long-life direct-connect alternative or a tankless RO if fluoride/TDS reduction is required.
Water Filtration Performance & Ownership
A fast side-by-side look at filtration, installation, capacity, certifications and ownership cost.
Which Is Right for You?
Frizzlife MK99
Best for: Renters and homeowners on treated municipal water who want lead/chlorine reduction, strong flow and very inexpensive cartridge replacements.
Consider if: Budget Under $100
Frizzlife SP99
Best for: Households using treated municipal water that want fast filtered water for drinking and cooking.
Consider if: Limited Counter Space, Budget Under $200, Low Replacement Cost, High Daily Output
Our Recommendation
Frizzlife MK99
One of the strongest value direct-connect under-sink filters for households that do not need reverse osmosis.
Frizzlife SP99
A strong-value under-sink system for municipal tap water, especially when lead, chlorine, taste, and odor are the primary concerns. It earns a 4.3 rating for combining useful certification, fast flow, and low ongoing costs without unnecessary electronic features.
The Short Answer
Choose MK99 for 2 GPM flow, low-cost cartridges and mineral retention; choose Waterdrop 15UA for a long-life direct-connect alternative or a tankless RO if fluoride/TDS reduction is required.
Choose the Frizzlife SP99-NEW if you want a fast, compact under-sink filter with a separate faucet and low replacement costs. Choose a certified reverse-osmosis system instead if TDS, arsenic, nitrate, or maximum contaminant reduction is your priority.
Water Filter Comparison FAQs
Answers are generated from the current SLF product records for these two systems.
Which is better, Frizzlife MK99 or Frizzlife SP99?
Frizzlife MK99 is the overall pick for this specific matchup. Choose MK99 for 2 GPM flow, low-cost cartridges and mineral retention; choose Waterdrop 15UA for a long-life direct-connect alternative or a tankless RO if fluoride/TDS reduction is required.
Which system offers remineralization?
Both systems are listed as no for remineralization in the current SLF records.
Do both systems require a plumbing connection?
Frizzlife MK99: Yes. Frizzlife SP99: Yes.
Which system is more renter friendly?
Frizzlife MK99: Yes. Frizzlife SP99: No. Check lease and plumbing-modification rules before installing an under-sink system.
What certifications are listed for these systems?
Frizzlife MK99: Full MK99 system tested by IAPMO R&T against NSF/ANSI 42 and NSF/ANSI 53. Certification applies to specific certified reduction claims and should not be interpreted as certification for every contaminant covered by those standards. Frizzlife SP99: The Frizzlife SP99-NEW is certified by IAPMO to NSF/ANSI 42 and NSF/ANSI 53. This means IAPMO is the certifying organization; the product is certified to NSF standards but should not be described as certified directly by NSF International. The Amazon listing also claims NSF/ANSI/CAN 372 compliance. No exact-model certification to NSF/ANSI 58 or 401 was identified, and WQA certification could not be confirmed.
How do estimated annual filter costs compare?
Frizzlife MK99: $19.99. Frizzlife SP99: $49.99. Actual replacement timing and prices can vary.