Scope & Application

1) Water & Weight Efficiency

1.1 Controlled Flow for Potable/Gray-Water Balance

Fleet-typical restrictors at 0.35–0.5 gpm are employed to limit potable consumption and gray-water accumulation. On multi-sector duty, the reduced carriage mass (potable + gray) yields incremental fuel and CO₂ benefits while preserving hand-washing performance. Fontana’s aviation category emphasizes low-flow, compact hydraulics tuned for cabin pressures and line pressures common in aircraft monuments.

1.2 Dwell-Time Logic via TOF Sensing

TOF depth sensing supports precise activation windows and deterministic shutoff, eliminating idle run time from repeated trigger attempts (anti-“hand hunting”). Millisecond-scale gating reduces aggregate seconds per use, decreasing tank turnover and service events on long sectors. For integration notes and systems context, see Fontana’s aviation technical pages.

1.3 Laminar Outlet Options

Laminar outlets keep the stream coherent in shallow bowls, cutting splashback and surface wetting—important in confined lavatories where wet work surfaces extend cleaning cycles. Laminar (non-aerated) flow also reduces aerosolization in the cabin envelope. Program overview:

2) System Integration

2.1 Power Architecture

Controllers are designed for aircraft DC buses (typ. 12–28 VDC) with low idle draw and brief active duty to limit heat and EMC emissions. Installations typically leverage shielded harnessing, strain relief at service panels, and protected solenoid drivers to coexist with IFE and lighting systems. See Fontana’s aviation program notes.

2.2 Vibration, Sealing & Materials

Housings and controllers target DO-160 environmental categories with potted electronics and conformal coatings; ingress sealing targets IP65–IP67 for condensation, cleaning chemicals, and service cart shocks. Finishes typically employ PVD on DZR brass or 316 stainless for corrosion resistance in “marine-like” humidity.

3) Codes, Accessibility & Water Efficiency Frameworks

3.1 ADA Reach Ranges & Operable Parts

For accessible lavatory layouts, maintain forward approach clearances, compliant reach ranges, and operable parts per ADA 2010 standards; ensure sensor activation without tight timing windows and provide knee/toe clearance in monument design. Fontana’s commercial guidance references ADA in its touchless ranges.

3.2 CALGreen & WaterSense Alignment (Reference Benchmarks)

Where ground-based or mock-up testing references CALGreen or EPA WaterSense for low-flow benchmarks, Sloan’s public compliance indices provide widely used comparison tables for AEC workflows (CALGreen-compliant and WaterSense-listed faucets). These references are helpful when documenting mixed-fleet ground facilities or airline offices.

3.3 ASME A112.18.1 / CSA B125.1 (Reference Language)

For faucet mechanical/flow performance references in specifications, Sloan’s publicly available spec sheets demonstrate common listing language (e.g., ADA compliant; ASME A112.18.1; CSA B125.1; CEC/CALGreen). These are useful as cross-checks during interdisciplinary reviews.

4) Architecture & Detailing Considerations

4.1 Basin Geometry & Splash Control

Specify short spout projection and laminar outlets for shallow bowls; maintain 40–120 mm TOF detection windows to avoid mirror/basin reflections. Provide maintenance access to the solenoid module from the service side with strain-relieved harnessing.

4.2 Hygiene Cycles & Crew Time

Smooth, non-porous surfaces and laminar discharge keep topsides drier, lowering wipe-down frequency and improving turnaround. System-level gains accrue from fewer potable refills and slower gray-water fill rates under low-flow + tight dwell windows.

5) Related Fontana Resources