Replacement Filters for the Watts W-525 (5-Stage) Reverse Osmosis System

Watts · 5-Stage Reverse Osmosis

Replacement Filters for the Watts W-525 (5-Stage) Reverse Osmosis System

Every filter your system needs — stage by stage — led by the IPW house-brand set that costs less than the OEM parts.

Also sold as: Watts W-525 · W-525 · Watts 5 stage RO
Watts W-525 (5-Stage)
✓ Best value — replace everything at once

W-525 IPW set + 3/8" QC inline — best value

$47.99

Guaranteed to fit your Watts W-525 (5-Stage).

🛒 Add the complete set to cart
Filters by stage
Buy the whole set above, or replace stages individually below.
1
replacement filter
Sediment pre-filter
5µm, 10×2.5
IPW 5M-SED-10×2.5 — 5µm sediment — $3.50
2
replacement filter
Carbon block / GAC
10×2.5 coconut carbon
IPW UDF-10 — coconut GAC carbon — $7.99
3
replacement filter
Carbon block / GAC (2nd)
10×2.5 coconut carbon
IPW UDF-10 — coconut GAC carbon — $7.99
4
replacement filter
RO membrane
50 GPD TFC
IPW TW-1812-50 — 50 GPD membrane — $32.99
5
replacement filter
Inline post-carbon polish
3/8" QC (ICF-10Q38)
ICF-10Q38 — inline GAC, 3/8" QC — $9.55
When to replace
🪣 Sediment & carbon: every 6–12 months💧 RO membrane: every 2–3 years
✓ Guaranteed to fit your Watts W-525 (5-Stage) / Watts W-525.
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