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What to Do When Your Filter Stops Performing

Here are some strategies others have used to solve this problem.  Which one would you choose?

A. Go on vacation suddenly and hope the problem is solved by the time you return
B. Assign a junior subordinate the task of solving the problem  (If he/she fails, your reputation isn’t tainted)
C. Tell your boss that a new filter needs to be purchased (It’s always nice to have new toys)
D. Hire an engineering firm to figure this out (that way, you don’t have to be accountable for the solution if it backfires)
E. Call the equipment manufacturer and hope the company is still in business and cares about your problem

As a manufacturer of filters, I like “C”.  It’s good for business and contributes to job creation.  You’re actually helping to improve the economy… Congratulations!


However, the best first step is to contact the manufacturer of the equipment and describe the symptoms you’re observing.  In all likelihood, they will know what information to obtain from you in order to identify the cause(s) of the problem.

Every filter has parameters within which it works as designed and produces the desired results.  When those parameters are exceeded, filter performance begins to degrade and changes are needed. Here are some frequent causes of problems with filter performance.

  1. The volume of water being sent to the filter has increased beyond the design capabilities of the unit.
  2. The characteristics of the water being fed to the filter have changed in a significant way.  Either new substances have appeared, or concentrations of known substances have increased significantly.   
  3. Equipment upstream of the filter may not be performing correctly and that’s causing problems for downstream equipment.
  4. If the filter needs to be cleaned periodically, the cleaning schedule has not been maintained or has been changed.  As a result, the filter is never cleaned thoroughly and, over time, it becomes increasingly difficult to pass water through it.  Differential pressure across the filter begins to rise and does not return to the clean filter condition even after cleaning. 
  5. Some component of the filter itself may be malfunctioning (such as the control unit, one or more valves).


If you’re experiencing problems with an existing filter or water purification unit, we at Everfilt would love to hear from you.  We’re still in business (after 35 years) and we do care!

One of our applications engineers would be happy to talk with you.  Call or e-mail us at:  (951) 360-8380  or everfilt@everfilt.com .


Written by Alfred Martinez

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