Shotgun size? 4" vs 2"

Perforated & bubble cap plated columns

Shotgun size? 4" vs 2"

Postby Remme » Tue Oct 17, 2017 7:22 pm

Hey guys,

Ive manage to acquire a decent length 2.5m of 4" pipe for nix to start my column build. I'm a little undecided on what size pipe to make my shotgun PC from. I have a fair amount of 2" lying around and will surely have some 4" left over to make it.

I have 2 x 2400w elements inside the boiler on a SSR contoller.

Thoughts on which way to go? ... Longer 2" or shorter 4" ?? i really wanted a 3" but im having a hard time sourcing that from the scrappy.
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Re: Shotgun size? 4" vs 2"

Postby Zak Griffin » Tue Oct 17, 2017 7:35 pm

500mm 2" with 6x 12" inners will knock everything down.
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Re: Shotgun size? 4" vs 2"

Postby Wobblyboot » Tue Oct 17, 2017 7:37 pm

Unless u gunna go 6” then I think the 2” shotty would be more than enough :-B I have 1 of macs and it hardly heats up :handgestures-thumbupleft:
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Re: Shotgun size? 4" vs 2"

Postby Lowie » Tue Oct 17, 2017 7:43 pm

Zak Griffin wrote:500mm 2" with 6x 12" inners will knock everything down.

:text-+1:
Or 5 x 1/2", might be easier for you to solder in too.
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Re: Shotgun size? 4" vs 2"

Postby Remme » Tue Oct 17, 2017 7:44 pm

Perfect! 2" it is, thanks for the replies fellas.
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Re: Shotgun size? 4" vs 2"

Postby db1979 » Tue Oct 17, 2017 7:59 pm

Good choice, all the extra mass from a 4" PC would probably require the rest of the build to be stronger. For example you might not get away with soft soldered easy flanges on your column. 2" has been tried and tested for PCs on 4" bubblers using all soft solder, so you're on a winner. Plus just think of all the other builds you can do with the left over 4" :handgestures-thumbupleft:
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Re: Shotgun size? 4" vs 2"

Postby woodduck » Tue Oct 17, 2017 8:46 pm

:text-+1: 4" would be way too heavy, thats alot of water hanging out there.

2" will knock down 10 Lph easy I'd recon :handgestures-thumbupleft:
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