L2-WTR-DIST ESSENTIAL RESOURCES Level 2 · hardware

Water Distribution

water_distribution_system

Network of pumps, pipes, valves, and flow controllers delivering water at correct pressure, temperature, and quality to all Ark consumption points.

Purpose

Transport water reliably from storage to every consumer (habitat, manufacturing, electrolysis, thermal systems) with guaranteed flow rate and pressure.

Context

The circulatory system of the Ark's water infrastructure, connecting centralized storage to distributed consumers across habitat modules and processing areas.

Principles

▸Pressurized distribution ensures flow to all points without gravity reliance
▸Redundant pump and piping paths prevent single-point distribution failure
▸Flow metering at every consumer enables leak detection by mass balance
▸Temperature-controlled loops prevent freezing in unheated conduits
▸Backflow prevention maintains water grade separation

Typical implementations

▸Magnetically coupled centrifugal pumps (zero-leak shaft seal)
▸Stainless steel or titanium piping with orbital-welded joints
▸Electrically actuated ball and diaphragm valves
▸Ultrasonic flow meters for non-invasive measurement
▸Trace heating on external pipe runs to prevent freezing
▸SCADA-type monitoring and control system

Lunar considerations

▸1/6 g insufficient for gravity-fed distribution, pumping required
▸External pipe runs exposed to vacuum and thermal extremes
▸Pipe routing through airlock boundaries requires hermetic penetrations
▸Lunar dust contamination of external valve actuators
▸Low gravity changes pump NPSH requirements and cavitation behavior

Specifications

Functional

primary function	Deliver water from storage to all consumption points at required flow, pressure, and temperature
inputs	stored_water_at_grade
outputs	water_at_consumption_points
delivery pressure	2-5 bar at point of use
flow capacity	scaled to peak simultaneous demand
leak detection sensitivity	<0.1% of total flow
distribution availability	>99.9%

Physical

materials	stainless_steel_316L_piping, titanium_fittings, PTFE_seals, ceramic_bearings_for_pumps, MLI_pipe_insulation
internal runs	pressurized habitat at 15-25 C
external runs	vacuum, -173 to 127 C with trace heating
penetrations	hermetic feedthroughs at module boundaries

Operational

thermal range c	-173, 127
lifetime years	100

Interfaces

Provides

→L0-ARKwater_deliverycritical
Pressurized water to all habitat and process consumers
→Water Reclamationwastewater_collectionessential
Return path for used water to reclamation system

Requires

←Water Storage Tanksstored_watercritical
Water from storage tanks at required grade
←L0-ARKelectrical_poweressential
Power for pumps, valves, trace heating, and controls