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PETG cloudy bends?

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post #11 of 15 (permalink) Old 01-29-2020, 10:09 PM
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Glad that worked out well. Also make sure the tubing is cool before pulling it out. Even though it feels cool on the outside doesn't mean the inside is. So making sure it's well lubricated as well as cooled so the wall doesn't smear will do the trick.
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post #12 of 15 (permalink) Old 02-02-2020, 08:55 PM
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Hmmmmm, just learned you cannot delete a post once it's already been posted lol
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post #13 of 15 (permalink) Old 02-03-2020, 03:14 AM
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Quote: Originally Posted by reaper829 View Post

[Posting for anyone else in the future who has this same issue.]

The problem seemed to be a lubrication/silicon cord removal issue. If the water wasn't soapy enough, it was leaving interior streaks on the inside when I pulled the silicon cord back out. Adding more soap and making sure the silicon cord was soaked fixed it. I also twisted as I pulled the silicon cord back out of the tube, instead of just pulling on it. A combination of these things resolved the issue.

I also noticed that if there was a streak right after I pulled the tube out, I could actually re-lubricate the silicon cord and twist it back in gently and it removed the smear. I couldn't do this with older tubes that had streaks, only recent ones. There must be a short time-frame where the streaks can be removed before it is permanent.

You're probably right that I wouldn't even notice it, but I may be doing clear liquid, so didn't want to have to drain the loop after the fact if I could see the streaks.

Thanks for the help everyone!
Also rinse the bend piece in a bucket of water to clear the streaks. Or even run some tap water through it to flush and rinse it in distilled. That gives me always clear tubes.

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post #14 of 15 (permalink) Old 02-03-2020, 04:34 AM
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nice work.

yeah i was going to just post, if you have not had any success on your bends,

i was going to suggest these for your perfect bend. i used Primochill 3/8" pipes myself. These silicon O rings are great

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post #15 of 15 (permalink) Old 02-11-2020, 11:34 AM
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I have built soft loops for eons and am currently doing a hard line setup. I originally bought PETG but after reading and feeling the material I decided to switch over to acrylic. Honestly, I don't know why more people aren't using acrylic. IMHO it's harder to overheat, it is stronger because of its raised operating temperature, it re-bends easily, and it is super crystal clear. I have read about people having fogging/hazing/drooping/fittings popping off with PETG and I am not sure it's the best material. Just 2 cents.
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