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pvc Shotgun Condenser

These are various style condensers for many different applications.

pvc Shotgun Condenser

Postby wanalearn » Wed Oct 02, 2013 10:42 am

hey guys gonna try build a shotgun using pvc drain pipe.. which i already have 4" with 9 1/2 soft copper tubes inside...using jb weld.. as dad300 pointed out to me in another post i posted :) thinking of making it 4ft long...my gas burner is 210000btus which is 61530 Watts should be plenty of knock down for a 6" colum with a 6" elbow on top.. im gonna cut a 2 inch peace of copper beat it flat solder over the 6" copper pipe drill a 3" hole in it and hammer it flat then solder it over the whole i drilled making a 6" to 3" reducer.. then ill make a 3" to 4" the same way using a exuast expander:) what do u guys think....ill post pics when i start would 4 feet be enough? for the shootgun i have no idea how to use that calcutor on hd keep getting mixed results
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Re: pvc Shotgun Condenser

Postby jake_leg » Wed Oct 02, 2013 10:56 am

The copper and PVC have different coefficients of expansion so the glue joints will crack and leak. I suggest you try rubber couplings.

http://www.pexsupply.com/No-Hub-Couplings-417000

4" ABS drain pipe would be better as it handles temperatures between 140°F and 180°F better than PVC.
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Re: pvc Shotgun Condenser

Postby wanalearn » Wed Oct 02, 2013 11:20 am

are those hard rubber?
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Re: pvc Shotgun Condenser

Postby Sambedded » Wed Oct 02, 2013 12:09 pm

I'd try silicon hermetic to seal.
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Re: pvc Shotgun Condenser

Postby Zymurgy Bob » Wed Oct 02, 2013 1:46 pm

jake_leg wrote:The copper and PVC have different coefficients of expansion so the glue joints will crack and leak. I suggest you try rubber couplings.

http://www.pexsupply.com/No-Hub-Couplings-417000

4" ABS drain pipe would be better as it handles temperatures between 140°F and 180°F better than PVC.

Those look like the kind that TRid on Yahoo Distillers used for the Liebig jacket on his copper/ABS condenser.
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Re: pvc Shotgun Condenser

Postby jake_leg » Thu Oct 03, 2013 7:37 am

Yes Bob, not my idea, there was a successful build and thanks for reminding me where I saw it!

The couplings are neoprene which is good for hot water, better than PVC anyway.
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Re: pvc Shotgun Condenser

Postby Bushman » Thu Oct 03, 2013 8:42 am

Looks very similar to mine!
image.jpg
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Re: pvc Shotgun Condenser

Postby wewt » Tue Nov 12, 2013 2:44 pm

Should be fine. Could even just use large hose clamps to secure it down together. PVC glue coming apart? I doubt it..Once you put that glue together the two piece of PVC become almost bonded. I realize the inside tubes will be copper(or stainless), but how are you going to put the top/bottom plate in without vapor hitting PVC? I got a few ideas in my head just wondering how you're tackling it.
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Re: pvc Shotgun Condenser

Postby Rebel_Yell » Tue Nov 12, 2013 5:27 pm

Glued PVC only "welds" as a surface bond. I've seen many examples through the years where freezing water pushed the pipes outta joints instead of bursting long ways. Sand the high spots off, prime and reglue.
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Re: pvc Shotgun Condenser

Postby wewt » Tue Nov 12, 2013 6:36 pm

Well of course it will Rebel. That's dealing with expansion. The water has no where to go. Must take a lot too...you can get up to some pretty high pressure using sch40 stuff.
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Re: pvc Shotgun Condenser

Postby tickle » Wed Nov 13, 2013 10:33 am

Bushman wrote:Looks very similar to mine!
image.jpg

Whoa! That's awesome
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