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PROBLEM
Excessive pressure
drop through filter
Contaminant not being
properly removed
Neutralizer media
raises pH too high
Neutralizer media fails
to raise pH sufficiently
Birm Filter fails to
remove iron
Loss of media
to drain
Howling or whistling
noise during
regeneration
Troubleshooting
CAUSES
A) Filter not
backwashing
B) Filter bed loaded
with sand
C) "Cementing" or
"Channeling"
D) Drain line restricted
E) Top Screen Fouled
F) Control Valve
plugged with debris
A) Leaking bypass
valve
B) Internal valve leak
C) Distributor not
seated properly in
control valve
D) Water usage flow
rate exceeds filter
specifications
A) Filter is brand new
B) Wrong media used
A) Water usage flow
rate is too high to
provide adequate
contact time
B) Media bed is
"Cemented" or
"Channeled"
A) pH too low
B) Dissolved oxygen
level too low
A)
Air in system
B) Insufficient soak
time before first
backwash after
installing media
A) Inadequate drain
line diameter or
drain line restricted
17
SOLUTIONS
1) Check timer motor and replace if faulty
2) Ensure uninterrupted power supply
3) Check Backwash frequency setup
4) Verify sediment being removed is less
dense than the filter media and install a
"Spin-Down" type sediment filter ahead
of the NBW to remove well sand
5) Verify adequate pumping rate for
backwash
6) Probe media bed to check for
"Cementing"
7) Check drain line for restriction: frozen,
plugged, kinked, exceeds 15', overhead
installation, flexible drain line, drain line
diameter too small
8) Remove and clean top screen
9) Disassemble and clean control valve
1) Verify bypass valve is in service position
2) Replace piston, spacers and seals
3) Verify distributor tube seated securely in
control valve body
4) Verify actual water usage flow rates
against system specifications
5) Increase length of backwash and rinse
cycles
1) Turn bypass valve very slightly to the
"Bypass" position allowing a small
amount of untreated water to bleed into
the treated water
2) Rebed the unit with a less aggressive
media
1) Verify actual water usage flow rates
against system specifications
2) Verify adequate pumping rate for
backwash
3) Check drain line for restriction: frozen,
plugged, kinked, exceeds 15', overhead
installation, flexible drain line, drain line
diameter too small
1) pH of untreated water must be 6.8 or
higher – adjust with proper equipment
2) Aerator may be installed prior to the filter
1) Ensure well system has proper air
elimination control
2) Check media level and adjust if
necessary
1) Reconfigure or replace drain line
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