• IsoTwist 5 Stage undersink Reverse Osmosis filter system
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Vertex IsoTwist™ 5 Stage undersink Reverse Osmosis Water Filter Systems | ISO-550R

$365.99 USD
$365.99 USD
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Platinum Seal Certified 5-Stage RO with proprietary twist-off filters | ISO-550R

The Vertex IsoTwist is an advanced undersink Reverse Osmosis filter system optimized to treat city water using the existing water pressure. This model makes up to 50 gallons a day of great tasting water while taking up less space than most other 4 and 5-stage models. The higher production capacity serves larger homes and offices. The easy twist-off disposable filter cartridges and RO membrane assembly are designed to make installation and replacement quick, easy and sanitary. These sturdy and reliable US made systems are IAPMO Platinum Seal certified to significantly reduce 13 contaminants to NSF/ANSI 58 (see list below).

Choose the 5-stage system to ensure water quality, membrane performance and filter life, when the incoming water contains a high amount of sediment as in some well water systems. An extra pre-filter stage is added before the membrane. The 5-stage model can also be used to extend time between filter changes.

The IsoTwist comes complete and ready to install, with quick connect fittings, 3/8″ tank to faucet tubing, dispensing faucet and instruction manual.

Features

• Proprietary twist-off filter cartridges
• Hi capacity 50 GPD TFC RO membrane assembly for easy replacement
• Quick connect O-ring seal fittings
• Compact size takes less space than most 4 and 5-stage systems
• Auto shutoff valve
• Flow restrictor – modified capillary
• Long reach, non-airgap chrome faucet included
• 4.0 gallon metal tank (not shown in photo)
• Feed water connector-1/2 inch threaded inlet adapter with metal ballvalve
• Drain connection included
• 1/4 Inch John Guest polyethylene tubing

Product Details

Vertex IsoTwist™ 5 Stage undersink Reverse Osmosis Water Filter Systems from Vertex & Aloha Pure Water is a reverse osmosis drinking water system designed to help keep your everyday water clearer, better-tasting, and easier to trust—whether you’re filling a glass, cooking dinner, or rinsing off after a long day in the Antelope Valley.
This component plays an important role in your home’s filtration setup, supporting high-quality drinking and cooking water so your family can stay confidently hydrated without having to think about the technology working behind the scenes.
Like every solution we recommend, it reflects our education-first approach: simple to understand, straightforward to service, and chosen to balance performance, reliability, and long-term value.

Why families choose this product:
- Supports fresher, better-tasting water for high-quality drinking and cooking water
- Pairs with existing equipment for a smooth upgrade or replacement
- Selected for families who want both protection and peace of mind

Technical Specifications

Key specifications for Vertex IsoTwist™ 5 Stage undersink Reverse Osmosis Water Filter Systems | ISO-550R:
- Product type: reverse osmosis drinking water system
- Ideal use: high-quality drinking and cooking water
- Installation: See system manual or contact Aloha Pure Water for guidance.
- Maintenance: Follow your recommended service schedule or subscribe for reminders and replacement kits.
- Proprietary twist-off filter cartridges
- Hi capacity 50 GPD TFC RO membrane assembly for easy replacement
- Quick connect O-ring seal fittings
- Compact size takes less space than most 4 and 5-stage systems
- Auto shutoff valve
- Flow restrictor – modified capillary
- Long reach, non-airgap chrome faucet included
- 4.0 gallon plastic tank
- Feed water connector-1/2 inch threaded inlet adapter with metal ballvalve
- Drain connection included
- 1/4 Inch John Guest polyethylene tubing

Awards and Certifications