Duro 6200 SXT - Troubleshooting Common Issues; Water Clarity and Stain Issues; Red Water and Backwash Issues; Excessive Filter Pressure Loss

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Trouble Shooting Guide
1. Water is clear when drawn, turns red upon standing (stain producing)
Insufficient air drawn by hydrocharger - Check hydrocharger adjustment. If unable to adjust for long enough draw,
check pumping rate.
Bypass open or leaking - Close bypass valve and/or repair as necessary.
Filter bed backwashed at improper intervals - Refer to backwash frequency chart in operation manual to ensure unit is
set correctly. Do not increase the backwash frequency unless required to based on the chart, since the media needs
to be some what iron-fouled for best performance (in more severe iron-fouling cases, filter bed may need chemical
cleaning — contact dealer).
Presence of manganese or tannins - Recheck water analysis.
Flow rate excessive for model - Reread Sec. 2: Facts To Remember When Planning Your Installation, Page 3.
Check-valve located between hydro-charger and pressure tank, disrupting water flow - Relocate check-valve.
Pumping cycle too short. pH of treated water too low (should be 7.0 or higher; with manganese, pH must
be 8.2) - Lengthen pump cycle time. Replenish MpH component in media (contact dealer).
2. Water is red when drawn from tap
Filter bed overloaded with precipitated iron due to insufficient backwash flow rate - a) Recheck well pumping rate
and repair or replace as required. (b) Check for obstructions or kink in drain line, or (c) for improper drain line flow
controller (see specs). Upon correction of this problem, if manually backwashing does not clear bed of iron, filter bed
may need chemical cleaning
Filter bed backwashed at improper intervals - Refer to backwash frequency chart in operation manual to ensure
unit is set correctly. Do not increase the backwash frequency unless required to based on the chart, since the media
needs to be some what iron-fouled for best performance (in more severe iron-fouling cases, filter bed may need
chemical cleaning — contact dealer)
Solenoid valve malfunction or inadequate supply system pressure/flow rate - Solenoid valve malfunction or inadequate
supply system pressure/flow rate
3. Excessive pressure loss through filter
Filter bed overloaded with precipitated iron - Refer to Section 2 above.
Control inlet/outlet valve(s) not fully open - open valves
Sand, silt or mud collecting in filter media - check well for these conditions
Filter bed not properly “classified” - Manually backwash to reclassify.
“Cementing” or “channelling” of filter media - Prod (stir) filter bed to break up hardened layer, backwash frequency to
prevent recurrence.increase
4. “MILKY” OR “BUBBLY” WATER (APPEARS TO CONTAIN SMALL BUBBLES)
Excess hydrocharger air-draw - Check adjustment for duration of draw in excess of one-third pumping cycle (see Step
9, Page 6).
Excess gases in water (carbon dioxide, hydrogen sulfide, methane) - May require cleaning or installation or air-relief
control (contact dealer).
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