1 6

iSpring

iSpring F9K NSF Certified 1-Year Reverse Osmosis Water Filter, Alkaline Remineralization Filters for 6-Stage RO Systems, Without RO Membrane

iSpring F9K NSF Certified 1-Year Reverse Osmosis Water Filter, Alkaline Remineralization Filters for 6-Stage RO Systems, Without RO Membrane

$100.07 USD
$100.07 USD
Shipping calculated at checkout.

Transform your home café with NSF-certified purity. The iSpring F9K replacement filter pack delivers mineral-balanced, crystal-clear water for espresso, baking, and everyday cooking—restoring both clarity and the natural minerals that elevate every creation.

☕ At a Glance

Type
6-Stage RO Filter Pack
Lifespan
1 Year
Materials
Polypropylene, GAC, Carbon Block
Cartridge Size
10" x 2.5" Standard
Certification
NSF & ANSI Certified
Pack Contents
9 Replacement Filters

✨ Comprehensive Multi-Stage Filtration

This nine-filter replacement set includes sediment pre-filters, granular activated carbon, carbon block cartridges, post-carbon polishing, and alkaline remineralization filters. Together, they remove contaminants while restoring beneficial minerals that enhance water's natural taste and pH balance. NSF and ANSI certification confirms removal of chlorine, sediment, and other common impurities—delivering restaurant-quality water for your home café.

🥤 Perfect For

☕
Home Baristas
Perfect espresso extraction
🧁
Bakers
Pure water for dough & batters
🍵
Tea & Coffee Lovers
Fresher, brighter brewed flavor
🍳
Home Cooks
Superior soups, stocks & meals

✨ Key Features

💧 Alkaline Remineralization ✓ NSF & ANSI Certified 🔄 Multi-Stage Filtration 🎯 1-Year Filter Pack 🌍 Reduces Plastic Waste

🧼 Care & Installation

Replace filters annually or more frequently depending on your water quality and usage volume. Each cartridge arrives individually wrapped to maintain freshness and purity. Installation is straightforward into standard iSpring 6-stage under-sink housings—simply follow your system's quick-change guidelines. No tools or special knowledge required; replacement takes just minutes.

— Why We Selected This —

The iSpring F9K stands out for its commitment to both purity and mineral balance. NSF certification ensures rigorous contaminant removal, while the alkaline remineralization stage restores calcium and magnesium—minerals that enhance water taste and your body's natural hydration. Perfect for SERA customers who view water as an essential ingredient in their culinary and café craft.

View full details

Blog posts

View all
  • Three glass syrup bottles beside a tall layered iced latte on a linen-covered light wood table

    Best Beverage Syrups for Café-Style Iced Drinks...

    A practical buyer's guide to the best beverage syrups for café-style iced drinks at home — covering vanilla, brown sugar, lavender, caramel, and fruit concentrates with precise usage ratios, pairing...

    Best Beverage Syrups for Café-Style Iced Drinks...

    A practical buyer's guide to the best beverage syrups for café-style iced drinks at home — covering vanilla, brown sugar, lavender, caramel, and fruit concentrates with precise usage ratios, pairing...

  • Five summer iced coffee drinks — cold brew, Japanese iced coffee, flash-chill espresso, shaken espresso, and nitro cold brew — arranged on a linen tablecloth on a light wood table

    Summer Iced Coffee Hub: Every Cold Drink Method...

    A complete summer iced coffee hub covering cold brew, Japanese iced coffee, flash-chill espresso, shaken espresso, and nitro cold brew — with ratios, grind sizes, best-bean guidance, and a quick-pick...

    Summer Iced Coffee Hub: Every Cold Drink Method...

    A complete summer iced coffee hub covering cold brew, Japanese iced coffee, flash-chill espresso, shaken espresso, and nitro cold brew — with ratios, grind sizes, best-bean guidance, and a quick-pick...

  • Reusable stainless steel iced coffee tumbler with straw lid filled with cold brew on a linen tablecloth beside a glass carafe

    Best Reusable Iced Coffee Tumblers and Cups (2026)

    A complete 2026 buyer's guide to the best reusable iced coffee tumblers and cups, ranking five formats by use case with cold retention data, lid type comparisons, size guidance, and...

    Best Reusable Iced Coffee Tumblers and Cups (2026)

    A complete 2026 buyer's guide to the best reusable iced coffee tumblers and cups, ranking five formats by use case with cold retention data, lid type comparisons, size guidance, and...

1 3
View all