Aquasure · Under-Sink RO Systems
Premier Series AS-PR75AK Alkaline Reverse Osmosis System
Skip until brand discloses filter composition and housing materials.
RO systems use carbon and membrane filters, typically lower concern. Brand provides no PFAS disclosure for filters or plastic components. Contact Aquasure for material specifications before purchase.
We flunk more products than we pass. This one earned its grade. How we grade
Material
RO membrane, carbon filters, plastic housing
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Premier Series AS-PR75AK Osmosis System is made of, ingredients and materials
The AS-PR75AK uses a reverse osmosis membrane (typically cellulose acetate or polyamide), granular activated carbon filters, and plastic housing. RO membranes themselves are not known to leach hazardous substances, but the housing material (resin type not specified in available documentation) and any plastic fittings can leach if exposed to temperature swings or prolonged water contact. Carbon filters are generally inert but can harbor bacterial biofilm if not maintained on schedule, which affects water quality more than chemical safety.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Plastic housing leachables (unidentified polymer type)
Aquasure has not disclosed the specific resin or polymer used in the AS-PR75AK housing. Generic plastic housings in RO systems can leach BPA, BPS, or phthalates under prolonged water contact or thermal stress, though incident reports for this brand are not documented.
Bacterial biofilm growth in filters and membrane
If carbon filters or RO membranes are not replaced on schedule, trapped organic matter and stagnant water create conditions for bacterial colonization. This degrades water safety and taste but is not a chemical leachate hazard; regular maintenance eliminates this risk.
PFAS
No independent lab data is publicly available for the AS-PR75AK. The brand's stated PFAS grade of 85/100 lacks transparency on test scope and material sourcing. Some RO filter media contain PFAS compounds; Aquasure's silence on this limits assessment.
Source, ATSDR ↗Microplastics
Granular activated carbon filters can shed fine particles if not properly sealed or if cartridge integrity fails. While modern RO systems minimize this, an aged or cracked cartridge may allow carbon dust to pass into product water.
Source, EPA ↗What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Lead
No recalls or test reports document heavy metal leaching from AS-PR75AK fittings or connections. Many RO systems sold in North America meet NSF/ANSI standard limits, but Aquasure's certification status for this model is not confirmed online.
Source, ATSDR ↗How is this PFAS grade calculated?
The brand's record and disclosure
Aquasure does not publicly disclose the specific polymer composition of the AS-PR75AK housing or filter cartridge materials. While the PFAS grade listed is high (85/100), this appears to be a self-assigned or third-party claim without transparent material sourcing documentation available in mainstream safety databases or NSF/WQA certifications visible online. No product recalls or documented leachate incidents are on record for this model, but the lack of detailed material transparency limits independent verification.
How it compares in its category
Reverse osmosis systems in this price and capacity range typically use similar membrane and carbon filter technology. The Premier Series AS-PR75AK does not stand out as lower or higher risk than generic RO units; competitive advantage often relies on filter life and replacement cost rather than material safety profile. Many mainstream RO systems carry NSF Standard 58 certification (which includes some testing for leachables); Aquasure's certification status for this specific model is unclear from public records.
If you buy it
Replace carbon filters and RO membrane cartridges on the manufacturer's schedule (typically 6-12 months for carbon, 2-3 years for membrane) to prevent bacterial colonization and ensure water purity. Store the unit in a temperature-stable environment (avoid freezing or heat above 40 C/104 F), as thermal stress can accelerate plastic housing degradation and micro-leaching. Check the housing visually for cracks or discoloration annually. Flush the system monthly if water usage is sporadic, and use the product water within 24-48 hours of storage to minimize stagnation.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Aquasure has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Premier Series AS-PR75AK Alkaline Reverse Osmosis System?
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More under-sink ro systems grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.