MIL-HDBK-1164
Table 37
Maintenance Checklist for Ion-Exchange Softening Units
Inspection
Action
(1), (2)
Softener unit
Shell
Clean and wire brush; paint.
A
Valves and fittings
Check for obstructions, corrosion, and
Q
fastness.
Check for leaks; repack if necessary.
SA
Ion-exchange medium Check bed surface for dirt, fines, and
Q
organic growths; remove foreign matter
and add resin to desired level.
Gravel
Probe through resin to determine gravel
Q
surface; level gravel surface with rake
during backwash flow; replace gravel
when caked or if resin is being lost to
effluent; wash and grade gravel and
place in four separate layers; use new
lime-free gravel at discretion of
inspector.
Underdrains
Check pressure drop through
A or V
underdrains; if necessary, remove
manifold or plate underdrains; clean and
replace.
Regeneration equipment
Salt-storage unit
Clean tank as necessary to remove dirt.
V
Brine tank
Clean out dirt and insolubles; allow to
SA
dry; paint both exterior and interior
surface.
Ejector
Clean, disassemble, check erosion and
A
corrosion; clear clogged pipes; assemble
and replace.
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