White waxy buildup inside water filter housing

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by minidiscs, Oct 12, 2021.

  1. minidiscs

    minidiscs New Member

    Joined:
    Oct 12, 2021
    Location:
    Martinsburg, WV
    Hello! I was changing the filters for the first time on my Aquasana AQ-5200 2-stage under counter carbon filters when I discovered a rather large amount (nearly a tablespoon) of white waxy, grease like build-up on the inside of each filter stage housing, pushed into the threads, and on the outside of the filter itself. I installed the filter system myself and did not use any sort silicon grease etc.

    The substance is almost pure white, resists water, does not dissolve or melt in hot water or vinegar. Bringing a flame to the substance dries it out, chars the edges black and dries it to a soft powdery consistency. It does catch aflame eventually and burns a low blue / yellow typical looking flame.

    Our water supply is municipal, city water and it's seemingly very hard with mineral buildup on many of the fixtures. Boiling water always results in minerals precipitating out.

    I could not find any info on such an occurrence here or anywhere else online. What could this substance be, and should I be concerned?

    Thanks for your time.

    minidisc-01.jpg
     
    Last edited by a moderator: Oct 12, 2021
    Reach4 likes this.
  2. Tuttles Revenge

    Tuttles Revenge In the Trades

    Joined:
    Oct 15, 2014
    It looks like silicone grease to me.
     
    Jeff H Young likes this.
  3. Sponsor

    Sponsor Paid Advertisement

     
    Jeff H Young likes this.
  4. minidiscs

    minidiscs New Member

    Joined:
    Oct 12, 2021
    Location:
    Martinsburg, WV
    Hmm, I didn't use any silicone grease when I installed. How would it have found it's way into the filter? No other plumbing work has been done in some time in this house.
     
  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Before you opened up the filter?
     
  6. minidiscs

    minidiscs New Member

    Joined:
    Oct 12, 2021
    Location:
    Martinsburg, WV
    My apology, I'll clarify. I opened the filter housing, the filter itself was within and had the substance on it.
     
  7. Bannerman

    Bannerman Well-Known Member

    Joined:
    Mar 19, 2014
    Location:
    Ontario, Canada
    Food grade silicone lube is usually utilized for O-rings. I also lube my filter's threads to provide easier disassembly for the following cartridge replacement.

    Since this is the first filter change, the lube will have been installed at the factory. It seems that it should have been installed closer to the O-ring as the ring appears that it may be dry.
     
    Tuttles Revenge likes this.
  8. minidiscs

    minidiscs New Member

    Joined:
    Oct 12, 2021
    Location:
    Martinsburg, WV
    There was no silicone lube preinstalled on the o-ring or the threads when I installed. You are correct in noticing that the substance in question is not on the o-ring in the photo. It seems to have originated from the water supply.
     
  9. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Long shot... any chance that this cartridge is fed from your water heater?
     
  10. minidiscs

    minidiscs New Member

    Joined:
    Oct 12, 2021
    Location:
    Martinsburg, WV
    No, just double checked. It's a cold line.
     
Similar Threads: White waxy
Forum Title Date
Plumbing Forum, Professional & DIY Advice Bradford White (Honeywell) Model # MI40T6FBN; HELP! Jun 30, 2021
Plumbing Forum, Professional & DIY Advice Bradford White Tankless Hot Water C-1 Error 5x/day Jan 1, 2021
Plumbing Forum, Professional & DIY Advice Oatey Great White Pipe Dope May 13, 2020
Plumbing Forum, Professional & DIY Advice White vertical PVC pipe on external kitchen wall Apr 8, 2020
Plumbing Forum, Professional & DIY Advice How to protect white plastic clean out protruding out of dirt in front yard Mar 6, 2020

Share This Page