iSpring Filter Replacement: Complete Guide for All RO Models

iSpring makes filter replacement straightforward with pre-packaged annual sets. Here's the complete guide covering the RCC7, RCC7AK, and other iSpring RO models.

Most important rule

Your model determines your filter set — they're not interchangeable

The RCC7 (5-stage) and RCC7AK (6-stage) use different filter sets. Always check your model number before ordering. iSpring filter sets are labeled clearly by compatible model.

RCC7AK replacement sets (6-stage with alkaline)

F4AK — 6-month	Pre-filters + alkaline for heavy users
F9K — 1-year	Most popular — complete annual replacement
F19K75 — 2-year	Includes RO membrane. Best value.
F28K75 — 3-year	Lowest per-filter cost

iSpring F9K (RCC7AK 1-Year Set) on Amazon →

RCC7 replacement sets (5-stage)

F4 — 6-month	Pre-filters for heavy use
F5 — 1-year	Complete 5-stage annual set
F15 — 2-year	Includes RO membrane

iSpring F5 (RCC7 1-Year Set) on Amazon →

General replacement schedule for all iSpring RO systems

Sediment pre-filter (Stage 1)	6–12 months — visible in clear housing on RCC7AK
Carbon filters (Stages 2–3)	12 months
RO membrane (Stage 4)	2–3 years — or when TDS rises above 50
Post-carbon filter (Stage 5)	12 months
Alkaline filter (Stage 6 — RCC7AK only)	12 months

Saving money on iSpring filters

Buy 2-year or 3-year sets upfront — lower per-filter cost than annual sets
Subscribe via Amazon Subscribe & Save for an additional 5–15% off
Only replace the RO membrane when TDS rises — don't replace it on a fixed schedule if readings are still good
Buying directly from iSpring's website sometimes offers loyalty discounts