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Window Cleaning Equipment Forum > Water Fed Pole Window Cleaning > Water Fed Poles (Moderators: Peter Fogwill, Jeff Brimble, karlosdaze, Mr H, WavieDavie) > when to change filters?
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Author Topic: when to change filters?  (Read 1168 times)
daddygez
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« on: September 09, 2009, 08:28:54 PM »
Hi guys. just changed over to wfp got a Vyair ro system. How do you tell when the filters need changing. I can measure the tds at the tap (365) and the tds at the filter outlet before it goes into the DI tank(25) Im getting 002 out of the DI tank.  Smiley
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paneintheglass
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« Reply #1 on: September 09, 2009, 08:35:57 PM »
if your membranes are not very old you probably just need to replace the resin
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coffeemug
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« Reply #2 on: October 06, 2009, 01:25:52 AM »
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Hi guys. just changed over to wfp got a Vyair ro system. How do you tell when the filters need changing. I can measure the tds at the tap (365) and the tds at the filter outlet before it goes into the DI tank(25) Im getting 002 out of the DI tank.  Smiley
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Peter Fogwill
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« Reply #3 on: February 10, 2010, 11:50:46 AM »
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Hi guys. just changed over to wfp got a Vyair ro system. How do you tell when the filters need changing. I can measure the tds at the tap (365) and the tds at the filter outlet before it goes into the DI tank(25) Im getting 002 out of the DI tank.  Smiley

Normally a system would be fitted with a pressure gauge, and when the pressure reduces the pre filters need changed.  The pressure gauge would be fitted between the pre filters and membranes.

Peter
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