Question about Culligan Under Sink Water Filter

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Leak at one of the fittings on my Culligan RO system

I have a leak at one of the fittings on my Culligan RO system. The leak is at the filter unit, on one of the lines connecting to the holding tank. Is it possible that too much air pressure in the holding tank could cause this?

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Too much pressure in holding tank will not cause leaks in the RO unit. All too much pressure in tank will do is cause low or no product water in RO tank. Older Culligan RO systems (H8, H83, H5) had fittings that used metal locking washers and these can cut the RO line after the RO has been moved around while changing filters. Newer styles (AC30, Water Tower) use quick connect fittings and the RO line may work loose after filter changes and system being moved around under sink.
Turn the incoming water off to RO, turn the water off on RO tank, open the RO faucet to relieve pressure and pull the line off feeding the RO tank, inspect (you may want to cut off a small portion of the line at the filter) check the o-ring and re-install.
RJ

Posted on May 19, 2011

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Posted on Jan 02, 2017

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http://www.johnguest.com/Home/applications/beverages-and-drinks-dispense/Inch-Size-Accessories/LOCKING-CLIP.aspx
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This on-line supplier has Culligan filters and John Guest fittings
http://www.freshwatersystems.com/

RJ

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The number you gave is likely a serial number, so I am unsure as to which Culligan RO system you have. I have included a link below to a page with several different system manuals, many of which are Culligan.
http://www.freshwatersystems.com/t-manuals.aspx


Geoff D., CWS-I - WQA Certified Water Specialist
Fresh Water Systems, Inc - http://www.freshwatersystems.com 1.877.335.3339

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