Certifications
NSF/ANSI 58 & 61 Certified — Independently Verifiable
Every OVAY membrane sold by Seven Pillars carries continuous NSF certification since 2017. Verify at NSF International’s official database.
Trusted by US Compliance Auditors
Direct from NSF’s Official Listing
All OVAY membranes sold by Seven Pillars are NSF/ANSI 58 & 61 certified — backed by Hunan Ovay Technology’s continuous certification with NSF International since 2017.
Certificate Number: C0270790-02
Certified Company: Hunan Ovay Technology Co., Ltd.
Facility Location: Zhuzhou, China
Standards: NSF/ANSI 58 (RO Systems), NSF/ANSI 61 (Drinking Water Components)
Certified Since: February 17, 2017 (continuously renewed)
What This Means
Why NSF/ANSI 58 & 61 Matters for US Brands
NSF/ANSI 58
Reverse Osmosis Drinking Water Treatment Systems.
Verifies contaminant reduction claims (TDS, lead, arsenic, fluoride, etc.) and structural integrity of RO systems. Required by major US retailers like Costco, Home Depot, and Amazon for water purifier listings.
NSF/ANSI 61
Drinking Water System Components — Health Effects.
Verifies that all materials in contact with drinking water (including the membrane itself) do not leach harmful contaminants. Required for water system components sold in 48 of 50 US states.
Continuous Audits
Annual unannounced facility inspections.
NSF International conducts annual on-site audits of Hunan Ovay’s Zhuzhou facility, plus quarterly product testing. Certification is not a one-time stamp — it’s ongoing compliance verification.
How to Verify
Verify in 3 Steps
- Visit info.nsf.org/Certified/DWTU — NSF’s official drinking water treatment unit search.
- In the “Company Name” field, enter: Hunan Ovay Technology Co., Ltd.
- Review the full list of certified RO membrane products and components.
Note: NSF certification belongs to the manufacturer (Hunan Ovay Technology). Seven Pillars is the authorized US distribution and OEM partner sourcing directly from this certified facility.
Need Compliance Documentation for Your Buyer?
We provide full NSF certification packages, test reports, and compliance letters for your retailer audits.