Replacement Filters for the Vertex PureWater PT-4.0 RO (under-sink) Reverse Osmosis System
Vertex · 3-Stage Reverse Osmosis
Replacement Filters for the Vertex PureWater PT-4.0 RO (under-sink) 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: Vertex · Vertex PT-4.0 · PT-4.0 · PT4 · Vertex PureWater · PureWater PT-4.0
✓ Best value — replace everything at once
IPW Vertex PT-4.0 Filter Kit — best value
$18.99
Guaranteed to fit your Vertex PureWater PT-4.0 RO (under-sink).
🛒 Add the complete set to cartFilters by stage
Buy the whole set above, or replace stages individually below.
When to replace
🪣 Sediment & carbon: every 6–12 months💧 RO membrane: every 2–3 years
✓ Guaranteed to fit your Vertex PureWater PT-4.0 RO (under-sink) / Vertex.
Not sure this is your system? Use the Isopure Water Filter Finder → Match by system name, by the part number printed on your current filter, or by snapping a photo.
Compatibility reference only. Photos of complete systems shown on this page are provided to help you identify your unit and confirm that our filters fit. All brand names, model numbers, and product images are the property of their respective owners; Isopure Water (IPW Industries Inc.) is not affiliated with, sponsored by, or endorsed by these manufacturers. We sell compatible replacement filters and parts — not the branded systems pictured, unless a system is separately listed for sale on our store.
