Mini sub cracked...
Page 1 of 3 123 LastLast
Results 1 to 10 of 26
Like Tree13Likes

Thread: Mini sub cracked...

  1. #1
    Full Member Verified Member
    Join Date
    Jan 2012
    Location
    Williamsburg, VA
    Posts
    48

    Question Mini sub cracked...

    About a week after I got my mini sub tank.. I noticed a small crack, starting from the base leading towards the other end. It was about a quarter of the way up the tank. A couple weeks later (today), the crack is now more than half the way up the tank.

    I've been using Rootbeer Float in this tank... Is that the cause of the problem? Any chance I can mend this up with just superglue?

    No leaks from the crack yet. Not looking for a refund...

    I think can post some pics if it helps.

  2. #2
    Supplier Associate ECF Veteran pwyll's Avatar
    Join Date
    May 2011
    Location
    Frank's ford, in the Caintuck
    Posts
    6,599

    Default

    Here is a possibly out-dated list of juices and ingredients known (and suspected) to damage polycarbonate:

    America's Newest Submarine Tank

    The Perfumer's Apprentice Root Beer flavouring is one of the ones listed, as well as any oil-based flavour--so if sassafras oil is used to create the root beer flavouring it will be "dangerous" to polycarbonate. On the other hand, chemically-induced damage to polycarbonate generally manifests as hazing and/or multiple cracks from the onset, so it may well be that there was already a micro-fracture from the cutting of the tubing and the juice is attacking that--creating a problem that wouldn't have existed without both the pre-existing micro-crack and the possibly questionable juice.

    There is a chance you could mend it with superglue, BUT--consumer-grade cyanoacrylate glues will breakdown with constant exposure to water/liquid and (it is my understanding that) anything in your juice that may be reacting with the polycarbonate is likely to cause the same issues with cyanoacrylate.

    The common DIY fix for making tanks for juices that destroy polycarbonate is to take a syringe or juice bottle with the same inner diameter as the polycarbonate tubing and cut a section of it to fit. Of course doing this will remove the thumbscrew filler hole, but polypropylene is soft enough the drilling a hole smaller than the screw should let it "self-tap" and work.


    P.S. if the superglue you are talking about using is specifically labelled for use in aquariums, it should work okay and be fine for use. If the initial problem is with the juice, though, it will likely cause cracks in other areas as well, but using "aquarium grade" cyanoacrylate will at least prolong the life of the tube for quite a while...
    P0P likes this.
    A hug is like a strangle you haven't finished yet.
    --Copernicus


  3. #3
    Full Member
    Join Date
    Jul 2012
    Location
    NC
    Posts
    28

    Default

    I have 3 of these tanks for about 2 months now. I have been pretty careful with them, never leaving them in a hot car or using citric juices. They have all cracked. The crack starts at the screw hole and runs up and down the tank. For the price and convenience of the tank I guess it is an ok lifespan but still kind of disappointing.

  4. #4
    P0P
    P0P is offline
    Supplier Associate ECF Veteran P0P's Avatar
    Join Date
    Nov 2011
    Location
    C'Ville Virginia
    Posts
    2,621

    Default

    Hi folks its snap, crackle, pop is there something i can do to help?


    Save 10% with ECFROCKS

  5. #5
    Supplier Associate ECF Veteran pwyll's Avatar
    Join Date
    May 2011
    Location
    Frank's ford, in the Caintuck
    Posts
    6,599

    Default

    Quote Originally Posted by Faids View Post
    I have 3 of these tanks for about 2 months now. I have been pretty careful with them, never leaving them in a hot car or using citric juices. They have all cracked. The crack starts at the screw hole and runs up and down the tank. For the price and convenience of the tank I guess it is an ok lifespan but still kind of disappointing.


    The nature of polycarbonate is to be brittle. That's one reason why some vendors get away with (i.e. manage to sell) a single inch-long "replacement tube" for the price of a 6 foot length of tubing--it can be difficult to cut without cracking or breaking it. Evidently the tapping process creates enough stress that constantly using the filler screw will crack (or expand micro fractures) the tank over time. I've got a couple of the submarine tanks I haven't used yet and they are still pristine.

    Unfortunately this is the sort of thing that only shows up over time and in real-world use, like finding out some vaping juices destroy "unbreakable" plastic. It's much easier to figure out why/how something happened than it is to predict that it will
    P0P likes this.
    A hug is like a strangle you haven't finished yet.
    --Copernicus


  6. #6
    Ultra Member ECF Veteran
    Join Date
    Apr 2012
    Location
    west bloomfield
    Posts
    1,256

    Default

    Quote Originally Posted by BryanM View Post
    About a week after I got my mini sub tank.. I noticed a small crack, starting from the base leading towards the other end. It was about a quarter of the way up the tank. A couple weeks later (today), the crack is now more than half the way up the tank.

    I've been using Rootbeer Float in this tank... Is that the cause of the problem? Any chance I can mend this up with just superglue?

    No leaks from the crack yet. Not looking for a refund...

    I think can post some pics if it helps.
    Hi Bryan....I wonder what happened. I've used M&P's Sub & Mini-Sub exclusively for approx. 6 months now & have never had a problem. I love these tanks & I'm sure I've even had a few of the no-no brews (DIY) in them & I won't even mention the occasional "oops" it fell. If you figure out what caused it, please let us know....

  7. #7
    Full Member Verified Member
    Join Date
    Jan 2012
    Location
    Williamsburg, VA
    Posts
    48

    Default

    Sorry... it's been awhile since I've logged in to look at the ECF posts.

    Its a pretty long and straight crack.... started at a 1/4 of the way from the base... and has grown, nearly to the top now.

    I've got other minisubs (3 others) that I have no issues or cracks with. Just seemed odd..

    Pic attached...
    Attached Images Attached Images
    Last edited by BryanM; 10-16-2012 at 12:04 AM. Reason: Changed pic description... some more on other mini subs I have.

  8. #8
    Ultra Member ECF Veteran
    Join Date
    Apr 2012
    Location
    west bloomfield
    Posts
    1,256

    Default

    Bryan.....I read a while back about someone cracked his by tightning the screw to tightly. Since you have 3 others, I'm pretty sure that's not what happened here.

  9. #9
    Full Member Verified Member
    Join Date
    Jan 2012
    Location
    Williamsburg, VA
    Posts
    48

    Default

    Quote Originally Posted by moishesmom View Post
    Bryan.....I read a while back about someone cracked his by tightning the screw to tightly. Since you have 3 others, I'm pretty sure that's not what happened here.
    Well... the crack is about 1.5 cm from the screw.

    My OP was really trying to figure out if this was from the Rootbeer float. I'd hate to give it up. I'm getting some conflicting answers on this.

    I suppose I could've dropped it at some point when I got it... Dont think so... but it's possible. I just wanted to try to rule out the juice.

  10. #10
    PV Master ECF Veteran r77r7r's Avatar
    Join Date
    Feb 2011
    Location
    US
    Posts
    5,189

    Default

    Quote Originally Posted by BryanM View Post
    Well... the crack is about 1.5 cm from the screw.

    My OP was really trying to figure out if this was from the Rootbeer float. I'd hate to give it up. I'm getting some conflicting answers on this.

    I suppose I could've dropped it at some point when I got it... Dont think so... but it's possible. I just wanted to try to rule out the juice.
    I vape unflavored and mine are cracking. 3 of mine are cracking from the screw hole. I'd be careful laying the cracked ones down also, I'm noticing puddles.

Page 1 of 3 123 LastLast

Bookmarks