Manual Regeneration of MacCLEAN NSM1501

by Crystal
(Grass Valley, CA)

Hello Matt,

I have a MacCLEAN home water softner Model #NSM501 witha rated service of 8 GPM. I noticed that when I went to check on the salt level it didn't appear to have used any salt at all.

More investigation made me aware that auto timer part of this device had not advanced in time over the next several days. So, apparently the auto timer is not functioning.

When I was a kid I remember my dad doing a manual regeneration every week with our old water softner. I see that my unit has the capability to advance the knob and run it manually, but I'm not what this whole process requires from me beyond the initital turning the knob to manual.

Are you able to help me? Unfortunately I can't locate the manual for my water softner. I would appreciate any direction you may have for me. Thanks!!


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May 28, 2015
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Jun 05, 2011
MacCleans Softener
by: RJ H2O Services

I believe this is the Fleck 5600 valve. The timer and drive motor are one in the same on this unit. If the unit is not holding time the timer motor needs to be replaced. The unit will not be able to cycle through even manually regenerating.
MacCleans/Cuno was bought out by 3M Corporation.
Here is the link to Cuno
Here is another link for the Fleck 5600 manual.


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