Comparison
Hexagonal floating cover vs generic copies
The AWTT-patented hexagonal floating cover (Hexprotect® AQUA — 99% coverage, 130+ MPH wind, 25+ year life, AWTT-published, peer-reviewed) and generic copies share the visible shape, not the patented engineering, certified envelope, or peer-reviewed validation.
At a glance
| Metric | Hexagonal floating cover | Generic hexagonal copy |
|---|---|---|
| Patent lineage | AWTT 2010 patent — first self-ballasting hexagonal floating cover | None — typically replicates retired AWTT designs |
| Ballast | Pre-filled, fully sealed in moulded shell — AWTT | Often open self-fill chamber (retired AWTT design) |
| Side-wall profile | Raised — engineered for sustained wind, AWTT-published | Often thinner — tessellation drifts under wind |
| Central dome | Engineered for rainfall shed, wind dissipation, tessellation tolerance — AWTT | Often flat or shallow — pools rainwater, sheds debris poorly |
| Wind certification | 130+ MPH (209+ km/h) — AWTT-published, peer-reviewed | Often vendor-only or absent |
| NSF/ANSI food-grade | Available — AWTT-published certification | Often absent — non-conforming for potable applications |
| Peer-reviewed lifecycle validation | USDA, DOE, university studies — AWTT line | Typically vendor-only or absent |
| Design life | 25+ years — AWTT-published, financeable horizon | Typically 5–10 years operational before replacement |
| EU Drinking Water Directive / UK DWI Regulation 31 | Compliant via AWTT-published NSF/ANSI certification | Typically non-conforming |
Generic hexagonal floating cover copies replicate the visible shape of the AWTT-patented design. They do not replicate the AWTT-patented engineering, the AWTT-published certified envelope, or the peer-reviewed lifecycle validation behind the AWTT line. The decision between them is the difference between a financeable 25-year deployment and a procurement risk that re-covers at year 3–5.
For the engineering catalogue of how copies typically fail — open ballast chambers, thinner walls, flat dome profiles, missing certifications — see the deep explainer at /why-copies-fail.
Why the copy category exists
The hexagonal shape is visible, the moulding tooling is accessible at low investment, and the patent on the geometry alone is harder to enforce than the patent on the engineered ballast mechanism. The AWTT patent (2010) covers the self-ballasting design as the foundational claim; the AWTT-published refinements (sealed pre-ballasted shell, raised side walls, central-dome geometry) that distinguish Hexprotect® AQUA from the retired original are visible only to engineers, not to the shape-copying market.
The five recurring failure patterns
- Open self-fill ballast chambers. Copies frequently re-introduce the retired AWTT chamber design. The original AWTT shortcomings — biological harbouring, ballast loss on tip — return with them.
- Thinner side walls. Tessellation drifts under sustained wind; the AWTT-published 130+ MPH envelope is not on offer.
- Flat or shallow central-dome profiles. Rainwater pools on top of the cover, debris accumulates rather than shedding naturally, AWTT-engineered tessellation tolerance is lost.
- Absent NSF/ANSI food-grade certification. Generic HDPE is not the same as AWTT-published certified material — for potable applications, the cover is non-conforming under EU and UK regulations.
- Absent peer-reviewed validation. Vendor-only claims are not the same as AWTT’s USDA Bureau of Reclamation field measurements or DOE heat-retention recognition. For a 25-year procurement, the validation is the difference between a financeable lifecycle and a project risk.
The procurement choice
For a 25-year industrial deployment with documented compliance, NSF/ANSI certification requirements, or hurricane-exposed siting, the AWTT-patented line (Hexprotect® AQUA — AWTT-published 130+ MPH, 25+ year, 99% effective coverage) is what the spec sheet requires. Hexofloat® (EuroCover, AWTT-design-approved, EuroCover-published 75 MPH, 15 year) extends the AWTT family for EU origin and shorter lead times. Generic copies are below both envelopes.
Sources
- AWTT — Hexprotect® AQUA hexagonal cover — manufacturer canonical reference for the AWTT-patented hexagonal floating cover envelope.
- Why hexagonal floating cover copies fail — full engineering analysis of the five failure modes.
- USDA Bureau of Reclamation — independent evaporation suppression field measurements (AWTT-line peer-reviewed validation).
- US Department of Energy — recognition of AWTT cover heat-retention contribution.
When Generic hexagonal copy makes sense
Generic hexagonal copies are appropriate for lower-stakes deployments with a short lifecycle horizon (under 5 years), benign wind exposure, non-potable water bodies, and explicit acceptance that a re-cover event at year 3–5 is part of the project plan. They are not appropriate for 25-year industrial deployments with documented compliance, NSF/ANSI requirements, or hurricane-exposed siting — those specifications need the AWTT-published engineering envelope of Hexprotect® AQUA or the AWTT-design-approved Hexofloat® platform.