Duro 9100SXT - User Manual

Questions and Answers

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Mark MathewsAug 20, 2025
What to do if my Duro 9100SXT fails to regenerate?
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  Scott RamseyAug 20, 2025
  If your Duro Water Dispenser fails to regenerate, there are a few potential causes. First, ensure the unit has a consistent electrical supply by checking the fuse, plug, chain, or switch. If the electrical service is fine, the timer might not be working correctly and may need replacement. A defective valve drive motor could also be the culprit, requiring replacement. Lastly, improper programming can prevent regeneration, so check the programming and reset it as needed.
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Amber KirbyAug 22, 2025
Why is Duro Water Dispenser using too much salt?
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  Melinda HuberAug 22, 2025
  If your Duro Water Dispenser is using too much salt, the issue might stem from a few causes. Verify the salt usage and salt setting to ensure they are appropriate. Excessive water in the brine tank can also contribute to this problem. Additionally, incorrect programming can lead to excessive salt usage, so check the programming and reset it as needed.
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Arthur GomezAug 25, 2025
How to restore water pressure in Duro 9100SXT?
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  drew07Aug 26, 2025
  If you're experiencing a loss of water pressure with your Duro Water Dispenser, it could be due to a few reasons. Iron build-up in the line to the water conditioner may be restricting flow, so cleaning the line is recommended. Similarly, iron build-up within the water conditioner itself can cause pressure loss; clean the control and add resin cleaner to the resin bed. If recent plumbing work has dislodged foreign material, it might be plugging the control inlet; increasing the frequency of regeneration can help clear this.
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patricia18Aug 28, 2025
Why is resin coming out of the drain line of my Duro Water Dispenser?
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  Benjamin AdamsAug 28, 2025
  If you notice resin loss through the drain line of your Duro Water Dispenser, it could be due to a couple of reasons. Air in the water system might be the cause, so ensure your well system has a proper air eliminator control. Alternatively, the drain line flow control might be too large; check for a dry well condition and ensure the drain line flow control is correctly sized.
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Jacqueline BradleyAug 30, 2025
What causes iron in the water from my Duro 9100SXT?
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  David ReedAug 30, 2025
  If there's iron in the conditioned water from your Duro Water Dispenser, it could be due to a fouled resin bed. Check the backwash, brine draw, and brine tank fill to address this. If the iron content in your water exceeds recommended parameters, consider increasing the frequency of regeneration and the backwash time. You might also need to add an iron removal filter system.
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ycantuSep 2, 2025
Why is there too much water in the brine tank of my Duro 9100SXT Water Dispenser?
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  Jennifer BanksSep 2, 2025
  If there is excessive water in the brine tank of your Duro Water Dispenser, it could be due to a few reasons. The drain line flow control might be plugged, so try cleaning it. A brine valve failure could also be the cause, requiring replacement. Improper programming can also lead to this issue, so check the programming and reset it as needed.
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Michael HenrySep 5, 2025
Why is my Duro 9100SXT Water Dispenser dispensing salt water?
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  Dr. William FoxSep 5, 2025
  If you're getting salt water in the service line of your Duro Water Dispenser, it could stem from several issues. A plugged injector system might be the cause; clean the injector and replace the screen. The timer might not be functioning correctly, requiring replacement. Foreign material in the brine valve or brine line flow control could also be responsible, so clean or replace these components as needed. Low water pressure can also contribute to this problem, so raise the water pressure. Finally, improper programming can cause salt water in the service line, so check the programming and reset it as needed.
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Tina JonesSep 7, 2025
Why is my Duro Water Dispenser not drawing brine?
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  valdezstevenSep 8, 2025
  If your Duro Water Dispenser fails to draw brine, it could be due to a few potential issues. The drain line flow control might be plugged, so clean it. The injector could also be plugged, so clean or replace it. Similarly, a plugged injector screen can cause this problem, so replace the screen. Finally, insufficient line pressure can prevent brine draw; ensure the line pressure is at least 20 psi at all times and increase it if necessary.
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Tanya ColeSep 12, 2025
Why does the Duro Water Dispenser control cycle continuously?
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  Rachel MendozaSep 12, 2025
  If your Duro Water Dispenser control cycles continuously, the timer may not be operating properly and needs replacement. Alternatively, there may be faulty microswitches and/or a harness, which would require replacing the faulty microswitch or harness. Lastly, the cycle cam operation might be faulty, in which case you should replace or reinstall the cycle cam.
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Laurie BaileySep 13, 2025
What to do if Duro 9100SXT drain flows continuously?
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  Michael RobertsonSep 13, 2025
  If your Duro Water Dispenser drain flows continuously, there are several potential causes. Foreign material in the control could be the issue; remove the piston assembly and inspect the bore, removing any foreign material and checking the control in various regeneration positions. An internal control leak might also be responsible, requiring replacement of the seals and/or piston assembly. The control valve could be jammed in the brine or backwash position, necessitating replacement of the piston, seals, and spacers. A stopped timer motor or jammed teeth could also cause continuous drain flow; replace the timer motor and check all gears for missing teeth. Finally, the timer itself might not be operating properly, requiring replacement.

Summary

Performance Specifications

How Your 9100 SXT Water Conditioner Works

Explains the ion exchange process and how the softener softens water using resin beads.

Control Operation During Regeneration

Details the display during regeneration, showing step number and remaining time.

Control Operation Modes

Metered and Timed Regeneration Modes

Explains Meter Immediate, Meter Delayed, and Time Clock Delayed regeneration controls.

Day of Week Control and Power Failure

Details Day of Week scheduling and operation during power outages.

Operating Instructions

Regeneration Cycle Programming

Details the pre-programmed factory settings for the regeneration cycle steps.

Setting the Time of Day

Managing Regeneration Cycles

User Programming Mode

Programming Mode Options Overview

Overview of adjustable parameters like Day Override, Feed Water Hardness, and Reserve Capacity.

Setting Day Override (DO)

Setting Feed Water Hardness (FH)

Setting Reserve Capacity (RC)

Error Codes and Troubleshooting

Error Code [Err 0] - Stalled Motor

Drive motor is stalled. Unplug the unit from the power source to reset.

Error Code [Err 1] - Continuous Motor Run

Error Code [Err 2] - Regeneration Delay

Error Code [Err 3] - Memory Failure

Operational Features and Controls

Manual Regeneration and Bypass Operation

Troubleshooting Guide

Water Hardness and Regeneration Issues

Addresses hard water delivery, regeneration failures, and salt usage problems.

Pressure, Resin, and Brine Tank Issues

Troubleshoots water pressure loss, resin loss, brine tank water issues, and salt water in service.

Brine Draw and Cycling Problems

Diagnoses failure to draw brine, continuous cycling, and continuous drain flow issues.

Duro 9100SXT Specifications

General

Model	9100SXT
Capacity	5 Gallons
Hot Water Temperature	185°F (85°C)
Weight	45 lbs
Type	Water Dispenser
Cooling System	Compressor
Cold Water Temperature	50°F (10°C)
Power Consumption	500W
Voltage	120V
Material	Stainless Steel
Color	Silver