W-415 Replacement Water Filters Compatible with Watts 4 Stage RO System
Complete 5-piece replacement filter set designed for Watts reverse osmosis systems and popular compatible models. Includes sediment pre-filter, carbon block, 50 GPD membrane, and inline polishing filter for reliable multi-stage filtration.
Four stages that cover sediment, organics, dissolved solids, and taste
5 Micron Sediment Pre-Filter
Melt-blown polypropylene construction catches sand, dirt, silt, and rust particles before they reach downstream filters. Extends membrane life by removing larger suspended solids first.
5 Micron Carbon Block
Coconut shell carbon compressed into a solid block removes chlorine, VOCs, and organic compounds. Block structure provides better contact time and filtration than granular carbon alone.
50 GPD Thin Film Membrane
The core of the system. Thin film composite membrane reduces up to 98% of dissolved solids, heavy metals, bacteria, and contaminants. Rated for 50 gallons per day output.
Inline Carbon Polishing Filter
Final-stage 10-inch inline filter with granular activated carbon stabilizes taste and removes any residual odors from the storage tank. Connects with 3/8-inch quick connect fittings.
Designed for Watts and widely compatible with popular RO brands
This W-415 filter set is engineered to fit Watts W-415, W415, and WP500313 reverse osmosis systems. Also compatible with APEC ESSENCE ROES-50, APEC ESSENCE ROES-PH75, iSpring RCC7AK, iSpring RCC7, Simpure, Home Master, NU Aqua, Express Water, Global Water RO-505, Bluonics, PureDrop RTW5, Hikins FS-TFC, and Olympia OROS-50. Verify your system uses standard 10-inch filter housings and 3/8-inch quick connect fittings before ordering.
Replacement schedule for optimal performance
Sediment and Carbon Block Filters
Replace the 5 micron sediment filter and 5 micron carbon block filter twice per year or sooner if you notice pressure drop or taste changes. Pre-filters protect the membrane.
Inline Polishing Filter
Swap the 10-inch inline carbon filter annually to maintain fresh taste and remove any odors from the storage tank. Quick connect fittings make replacement simple.
RO Membrane
Replace the 50 GPD membrane every 24 months under normal use. If your TDS readings rise or flow rate drops significantly, consider replacing sooner.
Complete Kit
All five filters in one package for full system refresh
Drop-In Replacement
Standard sizing fits Watts and compatible RO housings
Multi-Stage Filtration
Sediment, carbon, membrane, and polishing in sequence
Coconut Shell Carbon
High-quality activated carbon for taste and odor removal
