OnlyPure PCT + Alkaline Filter Replacement
Pre-Carbon & Mineral Enhancement Filtration for Tankless Reverse Osmosis Systems
Maintain optimal performance of your reverse osmosis system with the OnlyPure PCT + Alkaline Replacement Filter. This multi-stage cartridge combines sediment filtration, activated carbon purification, and alkaline mineral enhancement to improve water quality and taste.
The PCT filter acts as the first stage of filtration, reducing chlorine, sediment, and impurities before water reaches the RO membrane, while the alkaline mineral stage adds back balanced minerals for improved taste.
Multi-Layer Filtration Technology
The OnlyPure PCT + Alkaline filter uses a multi-layer filtration structure:
• Cotton sediment layer – captures rust, sand, and particles
• Activated carbon fiber – reduces chlorine, taste and odor
• Carbon rod layer – improves water clarity and protects the RO membrane
• Alkaline mineral layer – adds beneficial minerals such as calcium and magnesium to enhance taste
This combination provides effective pre-filtration and mineral balance for refreshing drinking water.
Improves Water Taste & Mineral Balance
The alkaline stage helps restore balanced mineral content often removed during reverse osmosis filtration.
Benefits include:
✔ Improved water taste
✔ Balanced mineral composition
✔ Fresh, smooth drinking water
✔ Support for everyday hydration
The mineral levels added are similar to natural mineral water.
Reduces Common Tap Water Impurities
The PCT filtration stage helps reduce:
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Chlorine
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Sediment
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Rust particles
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Sand and suspended solids
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Unpleasant taste and odor
This stage helps protect the RO membrane and extend its lifespan.
Compatible Systems
Designed for OnlyPure OPRO600-RO tankless reverse osmosis systems and compatible with select 600 GPD tankless RO systems including:
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Mist MRO003 4-Stage Carbon Block Under Sink Water Filtration System
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SimpliPure Genesis SPG-600 Tankless RO System
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Aquacubed A8 Tankless Reverse Osmosis System
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Crystal Water Products TRO-600
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ICEPURE Tankless RO System
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NAVIEN WUR500 Tankless RO System
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Eiger Direct Flow RO Reverse Osmosis Water Filtration System
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VELTRA A8 Alkaline Reverse Osmosis Under-Sink Water Filter
Always confirm compatibility with your system before purchase.
Filter Life
Recommended replacement interval:
6 – 12 months
Filter lifespan depends on:
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water quality
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daily water consumption
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sediment levels in tap water
Replacing the filter regularly ensures consistent performance and fresh-tasting water.
Easy Twist-Lock Installation
✔ Twist-lock cartridge design
✔ No tools required
✔ Replacement in minutes
This design makes maintenance simple for homeowners.
Key Features
✔ Multi-layer cotton & carbon filtration
✔ Reduces chlorine, sediment and odor
✔ Alkaline mineral enhancement for improved taste
✔ Designed for 600 GPD tankless RO systems
✔ Protects RO membrane and system performance
Enjoy clean, refreshing, mineral-balanced water every day with the OnlyPure PCT + Alkaline replacement filter.


