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Size Sch.40 For 9/16 Brass Tubing?


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#1 SirTofu

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Posted 23 January 2006 - 04:48 PM

Seeing as sch. 80 can't be found anyware, what size of sch 40 pvc make a perfect fit for 9/16 brass tubing? By perfect fit, I mean a perfect seal, yet allow the brass to move in the pvc. Thank you.

Edited by SirTofu, 23 January 2006 - 04:49 PM.

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#2 Team Slaya

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Posted 23 January 2006 - 05:24 PM

There's no way that you're gonna have a piece of PVC with a piece of brass in it that isn't secured in that has a perfect seal. If you take the brass and wrap some electrical tape around each end, just enough so that there's a tiny bit of room between the tape and inner wall of the PVC. Then, put some hot glue around each of the ends and stick it in quick. You should have a pretty decent seal. This is called "nesting" the brass.

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#3 euphemism

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Posted 23 January 2006 - 05:35 PM

Exactly, or if you insist on having it be removable use the right amount of e-tape so it can still easily move and then use teflon tape for the last bit.

Edited by euphemism, 23 January 2006 - 05:36 PM.

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#4 SpectreX

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Posted 23 January 2006 - 06:23 PM

If you want a better fit with brass in PVC, put the 9/16" brass inside 19/32" brass first. That should fit nicely inside 1/2" PVC. You'll want to throw some solder on the end of the brass to make sure it doesn't slip apart and has a better seal. Also I'd recommend epoxy to keep the brass in the PVC and for a better seal. At the very least you'll need e-tape to keep it from sliding out, but nothing beats epoxy for that job.
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#5 SirTofu

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Posted 23 January 2006 - 07:41 PM

This thing needs to slide in and out, as I am going to perform a breech/clip mod...
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#6 Team Slaya

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Posted 23 January 2006 - 08:24 PM

Try using an altered form of the Unknown Breech. It's a nice design, especially with the foam craft sheet.

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#7 SirTofu

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Posted 23 January 2006 - 08:27 PM

yeah, I've seen it. But my design is brass in the pvc. I suppose I'll just have to find sch 80?
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#8 davidbowie

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Posted 23 January 2006 - 08:37 PM

PVC nipples are usually SCH-80. If you can't find them in plumbing, look near the sprinkler parts. They are known as risers.
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#9 SirTofu

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Posted 23 January 2006 - 08:58 PM

but aren't the nipples only about 6 inches, at most?
Nm, saw at ace hardware online they carry 18 inch 1/2'' diameter nipples.

Edited by SirTofu, 23 January 2006 - 09:03 PM.

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