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Solvent weld a pvc bushing onto an abs reducing?

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Solvent weld a pvc bushing onto an abs reducing?

Unread postAuthor: cwazy1 » Mon Oct 15, 2007 9:35 pm

so i did the above..uhh ohh. . and i just found out that this is not a good thing. this is already done so i cant cut anything or etc. but what can i do to make sure the thing doesn't pop out on me?
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Unread postAuthor: Hubb » Mon Oct 15, 2007 9:40 pm

Solvent weld a pvc bushing to a pvc reducer. :D

No, really. The best thing to do is scrap it. Maybe add some screws to hold the bushing if you don't want to scrap it.
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Unread postAuthor: cwazy1 » Mon Oct 15, 2007 9:46 pm

ahh screws, friends of mine they are.

but seriously?? is solvent welding a pvc bushing into a abs reducier that bad?? its on a propane cannon so that doesnt produce that much psi in the first place?
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Unread postAuthor: Hubb » Mon Oct 15, 2007 9:53 pm

It may hold up. It may not. I wouldn't trust it, though, because that's not the way it was meant to be.
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Unread postAuthor: ShowNoMercy » Mon Oct 15, 2007 9:53 pm

I would just use the screws, they will look good anyway :wink: , and you should be fine.
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Unread postAuthor: LikimysCrotchus5 » Mon Oct 15, 2007 9:54 pm

Oh well in that case i guess it will be fine, but since i havent built a combustion yet, dont take my work for it. But, if your not using a high pressure which you wont anyway, it should then be fine.
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Unread postAuthor: ShowNoMercy » Mon Oct 15, 2007 9:57 pm

I used screws to fasten a few pieces of PVC without any glue on my air cannon, granted they were all after the main valve but still they held up fine.
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Unread postAuthor: cwazy1 » Mon Oct 15, 2007 9:59 pm

ahh, yeah i'll prolly just stick a couple of screws in there for safety

thanks guys!
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Unread postAuthor: Pilgrimman » Mon Oct 15, 2007 10:18 pm

Do not trust abs cement to hold PVC and vise versa. It'd be safer to use screws, as suggested above, or just scrap the thing, and spend a dollar or two on all PVC/ABS. Oh, and make sure to seal the screws well. My screws on my piston leak like mad if i dont tighten them down over some insulating tape first!
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Unread postAuthor: hi » Mon Oct 15, 2007 10:19 pm

if you used pvc cement it should be ok. if you used abs cement then scrap it.

i dont know if you saw my new little combustion that i posted in the combustion show case, but it has a ABS female adaptor glued to a pvc tee.

the weld seems strong, but then again its probably smaller than what you are using.

if you have some epoxy then it wouldnt hurt to put some on, but it should be ok as long as its not a pneumatic.
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Last edited by hi on Mon Oct 15, 2007 10:21 pm, edited 1 time in total.
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Unread postAuthor: ShowNoMercy » Mon Oct 15, 2007 10:20 pm

Its a combustion, I mean come on, it isn't going to be reaching much pressure and it wont be holding that pressure for very long, I am sure that he will be fine.
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Unread postAuthor: cwazy1 » Mon Oct 15, 2007 10:38 pm

i used transition cement which is specificallly meant to bond pvc and abs together. and it'll cost more than a dollar or two to go full one or the other, prolly hundreds.

its a 2" bushing in a 2" reducer.

scerws are all that i am planning to do, im not cutting my cannon cuz its already painted and etc.

i now declair this topic dead.
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Unread postAuthor: Marco321 » Mon Oct 15, 2007 10:47 pm

It wont make a strong bond because PVC glue is designed to melt the PVC and then join the 2 faces, creating a chemical bond. It might not even be an airtight bond.
Have you ever had pvc glue on metal? it is strong, but peals of easily. It will probably be a similar thing with the ABS.
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Unread postAuthor: BigGrib » Tue Oct 16, 2007 12:02 am

i dont know what he was talking about ^ but just screw it. i have a 1.5 to 2" reducer for my golf ball barrel going to a 1.5 sdr 21 pvc barrel and i glue the hell out of the thing and then screwed through actually 3 layers one on each 90 so if you do something like that no worries man
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Unread postAuthor: Marco321 » Tue Oct 16, 2007 12:15 am

BigGrib wrote:i dont know what he was talking about ^ but just screw it. i have a 1.5 to 2" reducer for my golf ball barrel going to a 1.5 sdr 21 pvc barrel and i glue the hell out of the thing and then screwed through actually 3 layers one on each 90 so if you do something like that no worries man


Lol, my point was PVC glue wont really work on ABS because of how PVC glue works.
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