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Unreakable res ... cracked!

T

TehQuick

2[H]4U
Joined
Jul 3, 2004
Messages
3,738
Quoted off the DD website: "Danger Den Bay Reservoir High-Density Polyethylene - Guaranteed not to crack, chip, or break like many acrylic reservoirs." Well, lets see, shall we?





I didn't break the damn thing, it was installed and used for about 8 months and then I tried changing water - and discovered that there is a small leak below the res, just a drop here and there (luckily, nothing fried). Any suggestion on what I am supposed to do?
 
Hmm that's awfully strange. Have you done anything that could cause it to break? What do you run in your water?
 
Anything will cracked if something is screwed in over-tight....................:0 Something has to give somewhere, even titainum will crack if overstressed long enough.
 
Bio-Hazard said:
Anything will cracked if something is screwed in over-tight....................:0 Something has to give somewhere, even titainum will crack if overstressed long enough.
Click to expand...
QFT, dont expect plastic to be unbreakable... guarenteed just means they will replace it if it ever breaks, notice it broke at the seam, always breaks at weakest part
 
Does it look like I screwed it in overtight? 'Cause it's the same on both sides, and the middle one is even further in, but the break occured only on one side :confused:
 
From the pics it looks like. But it's hard to tell just by looking. Just contact Danger den about the problem and see what they say. ;)
 
Yup you ovetightened it. Just because the barb has all those threads it doesn`t mean you have to use all of them. ;)
 
that was my first thoguth too...

also the other ones might not be in over-tight. Each hole is different, each barb is different, and both have ranges of tolerance. So you could get a large barb and a small hole and have it crack relatively easily, or a small barb and a large hole and have to use teflon out the ass just to seal it.
 
The question on my mind is - why did it happen after 8 months of use, and not immediately? That is, if I overtightened it... I mean if u apply too much pressure to something, it may not break immediately, but it also doesn't wait for 8 months to happen.... :)
 
MY question is what idiot carved that mold. Why mold it with the seam in the place that's going to see the most stress.
 
NewBlackDak said:
MY question is what idiot carved that mold. Why mold it with the seam in the place that's going to see the most stress.
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It's most cost effective for injection molding or blow molding or however the parts were made... It wouldn't be a bad idea to have a tight-fitting reinforcing sleeve around the OD of that flange.
 
It looks to me like the resevoir is not broken at all. It looks like you have a leak around the barb, a very small leak as well. Water slowly seeped out through that leak and happened to accumulate around the diameter of the barb, and then traversed down the seam in the plastic. I would try cleaning it up real good and testing it again, I think you will find that the resevoir itself is just dandy, and that you just need a new barb, or need to seal up the barb a bit better.
 
zer0signal667 said:
It's most cost effective for injection molding or blow molding or however the parts were made... It wouldn't be a bad idea to have a tight-fitting reinforcing sleeve around the OD of that flange.
Click to expand...
I have worked in plastics molding before, and found what's most cost effective isn't always what's best for customers supporting a product. We made a bottle that had to take some pressurs, and they had to design the mold just so this didn't happen on the fitting. Now that you mention it though, metal inserts in or around the plastic are a good idea. Metal thread inserts would be even better.
 
Erasmus354 said:
It looks to me like the resevoir is not broken at all. It looks like you have a leak around the barb, a very small leak as well. Water slowly seeped out through that leak and happened to accumulate around the diameter of the barb, and then traversed down the seam in the plastic. I would try cleaning it up real good and testing it again, I think you will find that the resevoir itself is just dandy, and that you just need a new barb, or need to seal up the barb a bit better.
Click to expand...

Yeah it does appear that way, it was only like a few drops of water out of it. But seam has opened up a lil' around the fitting, letting all that water out. It's a bad photo, so u can't really see it clearly. It's a small opening but it's there.
 
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