Water point failure mechanisms

The following is intended to be a rough taxonomy of water point failure mechanisms. There are three groups:
(1) reasons the water point has been shut down (as in non-functional and beyond repair).
(2) reasons that the water point as a whole is broken (but fixable, potentially).
(3) reasons that (a) particular component(s) of a WP has failed, needing repair. This is specified by a pair of fields: the individual component & the associated failure mechanism. Components need to be multiply selectable (with mechanisms) as more than one component may be broken.

I've kept "Broken" in the lists despite being ambiguous with other option as a possible default.

WATERPOINT ABANDONED (Not functional)
Waterpoint closed
Community leaders' decision
Never worked since construction
Poor water quality (see below in the fixable list for more details)
Insufficient water (see below in the fixable list for more details)
No need for the WP (e.g. population moved away)
Alternative WP nearby
Electrical supply gone
Land rights
Refugee camp closed

The following are listed in the Ministry data but are actions taken following closure rather than reasons for closure
All equipment removed
Disconnected
Plugged

WATERPOINT NEEDS FIXING (inactive but not yet abandoned)
NB: bullets in this list are notes and not intended as sub-types unless stated

Broken

• careless use

Accumulation (but note, better if a particular component can be identified as Blocked)

• of sand
• blocked by mud

Insufficient water supply

• water diverted (e.g. to another village)
• drought
• seasonal
• supply low (ran/running dry)
• pressure low (not the same as supply low. Might be same as pump insufficient)
• well too shallow

Free-flowing water

Destroyed

• Destroyed by floods

Poorly maintained

• lack of supervision
• poor management
• leadership problems

Poor water quality

• bad taste of water
• saline / salty
• defecation at site
• dead body in supply

Cost

• bill not paid
• no fuel

Land rights

• conflict

Collapsed

• caving-in: soil fallen into hole (well?)
• earthquake

Construction incomplete

Dam collapsed

Dam silted-up

Pump insufficient

• too weak: not pumping water up
• (is this different from Insufficient water supply? I think so)

Under construction

Too much resistance on the hand pump

Outdated equipment

Electrical supply problem

• Supply broken (part of the WP)
• Supply broken (needs electrical distributor to fix)
• Supply missing

COMPONENTS (to be paired with FAILURE TYPE below)
Valve (sub-type of Foot-valve, Gate-valve)
Tap
Pipe(s)
Pump (Motorised, Hand)
Source
Outlet
Bearing
Bibcock
Collar
Gater
Handle
Bucket
Chain
Cover
Tank
Cylinder
Piston
Piston seal (rubber)
Plunger (different from Piston?)
Riser
Rod
Distribution lines
Engine (Generator, Power supply)
Elbow
Floor
Roof
Cables (Wires, Wiring)
Gutter(s)
Intake
Nuts
Meter
Nail
Slab
Standpipe
Connection (as in, not connected to tank/supply. Is this like Pipe?)
Impeller
Thread (in this useful? Sub-part of another component)
Solar panel
Spring
Windmill

COMPONENT FAILURE TYPE
Broken (might be a default - not sure it's different from Damaged)
Missing (includes "stolen")
Blocked
Poorly sited
Damaged -> Sub-types:

• Cracked
• Leaking
• Bent
• Salt-damaged
• Rusted
• Burst
• Not sealed