Pentair Fleck 2850 - User Manual

Questions and Answers

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Brian HammondAug 16, 2025
Why is my Pentair Control Unit producing hard water?
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  rsimmonsAug 16, 2025
  If you're experiencing hard water with your Pentair Control Unit, several factors could be the cause. Ensure the bypass valve is closed. Check the brine tank and add salt, maintaining the salt level above the water. Inspect and clean the injector screen. Verify sufficient water flow into the brine tank and clean the brine line flow control if it's plugged. If you have a hot water tank, repeated flushing might be necessary. Examine the distributor tube for cracks and check the o-ring and tube pilot. Finally, an internal valve leak could be the culprit, requiring replacement of seals, spacers, and/or the piston.
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aguilarericAug 19, 2025
What to do if Pentair Fleck 2850 fails to regenerate?
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  Kevin DaviesAug 19, 2025
  If your Pentair Control Unit fails to regenerate, there are a few potential causes. First, ensure the unit has a permanent electrical service by checking the fuse, plug, pull chain, or switch. A defective timer could also be the issue, requiring replacement. Finally, check if there was a recent power failure, and if so, reset the time of day.
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Sherry WardAug 22, 2025
How to restore water pressure in Pentair Control Unit?
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  oprinceAug 22, 2025
  If you're experiencing a loss of water pressure with your Pentair Control Unit, it could be due to a few reasons. Iron buildup in the line to the water conditioner or within the conditioner itself can cause this issue; clean the line and add mineral cleaner to the mineral bed, also increase the frequency of regeneration. Additionally, the inlet of the control might be plugged due to foreign material; remove the piston and clean the control.
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Brittney SimsAug 26, 2025
What causes excessive water in brine tank of Pentair Fleck 2850 Control Unit?
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  susan98Aug 26, 2025
  If there's excessive water in the brine tank of your Pentair Control Unit, start by cleaning the drain line flow control. Also, clean the injector and screen, as a plugged injector system can cause this. If the timer isn't cycling, replace it. Foreign material in the brine valve or brine line flow control can also be responsible; replace the brine valve seat and clean the valve, and clean the brine line flow control, respectively.
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Stephanie JacksonAug 28, 2025
Why Pentair Fleck 2850 not drawing brine?
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  Courtney AustinAug 28, 2025
  If your Pentair Control Unit isn't drawing brine, several issues could be the cause. Start by checking and cleaning the drain line flow control, injector, and injector screen for any blockages. Ensure the line pressure is at least 20 psi. An internal control leak may also be the problem, requiring you to change the seals, spacers, and piston assembly. Finally, check the drive motor and switches to ensure the service adapter is cycling correctly.
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Andrew ProctorAug 31, 2025
Why does my Pentair Fleck 2850 use too much salt?
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  John MaciasAug 31, 2025
  If your Pentair Control Unit is using too much salt, first, check the salt usage and salt setting to ensure they are properly configured. Also, check for excessive water in the brine tank.
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Dustin LeblancSep 3, 2025
What to do if Pentair Fleck 2850 drain flows continuously?
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  Sarah WilsonSep 3, 2025
  If the drain is flowing continuously in your Pentair Control Unit, it may be due to the valve not programming correctly; check the timer program and positioning of the control, and replace the power head assembly if it's not positioning properly. Foreign material in the control can also cause this; remove the power head assembly and inspect the bore, removing any foreign material and checking the control in various regeneration positions. Finally, an internal control leak could be the issue, requiring replacement of the seals and piston assembly.
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Wendy NortonSep 6, 2025
Why is Pentair Fleck 2850 Control Unit losing mineral through drain line?
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  Toni HayesSep 6, 2025
  If you're experiencing a loss of mineral through the drain line of your Pentair Control Unit, it could be due to air in the water system; ensure that the well system has a proper air eliminator control and check for a dry well condition. Alternatively, the drain line flow control might be improperly sized; check for the proper drain rate.
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Peter DudleySep 9, 2025
How to remove iron from conditioned water of Pentair Control Unit?
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  Travis KentSep 9, 2025
  If there's iron in the conditioned water from your Pentair Control Unit, it could be due to a fouled mineral bed. Check the backwash, brine draw, and brine tank fill. Increase the frequency of regeneration and the backwash time.
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Arthur DrakeSep 12, 2025
Why is my Pentair Fleck 2850 cycling continuously?
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  Steven BooneSep 12, 2025
  If your Pentair Control Unit cycles continuously, it could be due to a misadjusted, broken, or shorted switch. Determine if the switch or timer is faulty and replace it, or replace the complete power head.