Epic Cleantec OneWater Rain System

Design Solution · Water Management

Design Solution · Dream about it

Integrated rainwater and condensate treatment system for non-potable reuse in mid-market buildings.

OneWater Rain combines first-flush diversion, sediment filtration, and NSF/ANSI-55 UV disinfection to treat harvested rainwater and HVAC condensate for toilet flushing, cooling tower makeup, and irrigation. It addresses the gap between buildings too small for complex blackwater reclamation but seeking measurable water savings without major plumbing retrofit. The system leverages Epic Cleantec's parent-company operational track record (Salesforce Tower: 7.8M gal/yr reuse) but is itself a new November 2025 SKU with no independent third-party operational validation or published case studies.

OneWater Rain combines first-flush diversion, sediment filtration, and NSF/ANSI-55 UV disinfection to treat harvested rainwater and HVAC condensate for toilet flushing, cooling tower make-up, and irrigation — targeting the gap between buildings too small to justify full blackwater reclamation and those seeking measurable water savings without potable plumbing redesign. The parent company's Salesforce Tower installation (7.8 million gallons per year in reuse) provides genuine operational credibility at the system level, and NSF/ANSI-55 certification avoids bespoke permit negotiation for non-potable reuse. The critical caveat is that OneWater Rain is itself a November 2025 SKU with no independent third-party operational validation and no published case studies of its own — the Salesforce Tower performance is a different product at a different scale. Rainfall and cooling load variability mean water supply from this system is not dispatchable; tank sizing and demand-matching are design-critical decisions that cannot be optimised without site-specific hydrological and occupancy data. Non-potable applications only leaves the largest potable demand in commercial buildings — drinking, showers, sinks — untouched, so the water-savings case needs to be modelled honestly against total building consumption. An ongoing maintenance burden (filter changes, UV lamp cycling, microbial testing) and dedicated non-potable pipework add operational and capital cost. This is a sensible mid-market water-reuse concept with solid certification; the honest position is that it needs twelve to twenty-four months of reference sites before it can be specified with confidence on a project where long-term performance matters.

Strengths

• Reduces potable water demand for non-critical end uses (toilets, irrigation, cooling) without requiring potable plumbing redesign
• Modular, pre-engineered approach reduces integration complexity versus custom blackwater systems
• Dual source (rainwater + HVAC condensate) maximizes recovery from available building streams
• NSF/ANSI-55 certification provides regulatory confidence for non-potable reuse without bespoke permit negotiation
• Targets economic payback window relevant to mid-market building owners (smaller capital outlay than whole-building systems)

Considerations

• Dependence on rainfall and cooling load variability — water supply is not dispatchable; storage sizing and demand matching become design-critical (moderate)
• Adds ongoing maintenance burden: filter replacement, UV lamp cycling, tank inspection, and microbial testing to remain compliant with NSF standard (moderate)
• Limited to non-potable applications only — does not reduce potable demand for occupant consumption (drinking, showers, sinks), which is often the largest use in commercial buildings (moderate)
• Requires dedicated non-potable plumbing runs and signage to prevent cross-connection — adds mechanical and management complexity for retrofit (moderate)

Risks

• No independent third-party operational validation or published case studies for OneWater Rain SKU (high)
• New product (November 2025) with no field deployment history or long-term performance data (high)
• Reliance on parent-company (Salesforce Tower) performance data rather than direct product evidence (moderate)
• Non-potable reuse regulatory compliance variability across jurisdictions may limit addressable market (moderate)
• Scaling feasibility from flagship (7.8M gal/yr) to mid-market segment unvalidated (moderate)

Performance

• Annual water reuse potential: 7.8M gal/yr (Salesforce Tower reference)
• Water reclamation standard: NSF/ANSI-55 UV disinfection
• Target building segment: Mid-market (avoids complex retrofit)

Reality check

Epic Cleantec's Salesforce Tower blackwater system is independently documented and verified (USGBC case study, public reporting). OneWater Rain product page was last modified 20 May 2026 and references 'contracts in California and Texas' but provides no published deployment reports, performance data, user testimonials, or third-party certification beyond NSF/ANSI-55 (which is standard for UV disinfection, not system validation). No MEP design guides, O&M manuals, failure modes, or cost-per-gallon benchmarks found. Claims of 'reduced footprint and installation time' lack comparative evidence.

#rainwater harvesting #water reuse #non-potable water #condensate recovery #mid-market retrofit #UV disinfection #water conservation

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