Isopure Water
W-525 Replacement Water Filters Compatible with the Watts 5 Stage RO System
$47.99
This complete 5-stage replacement filter set delivers certified filtration performance for Watts W-525 and compatible 50 GPD reverse osmosis systems. Includes sediment pre-filter, dual carbon blocks, 50 GPD TFC membrane, and inline polishing filter with 3/8" quick-connect fittings.
PACKAGE CONTENTS
Complete 5-Stage Filter Set
Sediment Filter
5 Micron
Melt-blown polypropylene
Carbon Block Filters
Qty 2
5 micron coconut shell carbon
RO Membrane
50 GPD
TFC thin-film composite
Polishing Filter
10" GAC
Inline carbon, 3/8" QC
Membrane Rejection
Up to 98%
Bacteria and dissolved solids
Total Pieces
5 Filters
Complete annual replacement kit
TECHNICAL DETAILS
Filter Specifications
| Stage 1 Sediment Filter | 5 micron melt-blown polypropylene, removes sand, silt, rust, and particulates |
| Stage 2 & 3 Carbon Blocks | 5 micron coconut shell carbon block, removes chlorine, organics, and suspended particles |
| Stage 4 RO Membrane | 50 GPD thin-film composite, 98% rejection of TDS, bacteria, heavy metals, and contaminants |
| Stage 5 Polishing Filter | 10" inline granular activated carbon, final taste and odor polishing with 3/8" quick-connect |
| Membrane Material | Thin-film flat sheet composite membrane |
| Carbon Source | Premium coconut shell activated carbon |
| Replacement Interval | Sediment and carbon filters annually, membrane every 2-3 years depending on water quality |
COMPATIBILITY & APPLICATIONS
Works With These Systems
Direct replacement for Watts W-525, W525, and WP500313 reverse osmosis systems. Also compatible with APEC ESSENCE ROES-50 and ROES-PH75, iSpring RCC7AK and RCC7, Simpure systems, Home Master units, NU Aqua, Express Water, Global Water RO-505, Bluonics, PureDrop RTW5, Hikins FS-TFC, and Olympia OROS-50. Fits standard 10-inch housings with 3/8" quick-connect fittings. Verify your system uses 50 GPD membrane capacity and 10" filter housings before ordering.
💧 Replace sediment and carbon filters every 12 months and the membrane every 2-3 years to maintain optimal flow rate and contaminant rejection. If you notice decreased water production or taste changes, check the sediment filter first before assuming membrane failure.
