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NPT fitting

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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NPT fitting

Unread postAuthor: roughboy » Fri Dec 15, 2006 10:26 pm

Do (male spigot to female NPT fitting) come in metal or just PVC?
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Unread postAuthor: PVC Arsenal 17 » Fri Dec 15, 2006 10:29 pm

you mean a male thread x a female thread? There should be, haven't seen any though. Why?
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Unread postAuthor: CS » Fri Dec 15, 2006 10:32 pm

Well if you think about it, metal isn't solvent welded. Rather its threaded in all necessary connections. So quite simply there would be no use for a Spigot component featured in metal. This is unless as 'PVC' suggested, you mis-identified the fitting in question.
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Unread postAuthor: MrCrowley » Sat Dec 16, 2006 1:28 am

What about if it was used for a copper barrel, e.g a 10mm socket to a 25mm threaded end for the sprinkler valve. I have two 10mm(3/8") female socket to 20mm(3/4") female threaded end. I used 10mm copper with it, drilled a hole and threaded a screw as I don't have a copper solder, and connect that to a Black Hansen 20-25mm spigot.
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Unread postAuthor: sgort87 » Sat Dec 16, 2006 10:08 am

Metal spigot fittings are made. They are meant to be welded in place, just not with solvents.
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Unread postAuthor: SpudStuff » Sat Dec 16, 2006 11:45 am

Yes, many codes around here require the PVC "female" threaded fittings to be the reinforced. That is where there is aa SS ring molded into the fitting just outside the threads. Because the threads are tapered there is pressure pushing out from both the threads and the water pressure, this can cause cracking in the joint.
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Unread postAuthor: MrCrowley » Sat Dec 16, 2006 2:04 pm

sgort87 wrote:Metal spigot fittings are made. They are meant to be welded in place, just not with solvents.


I thought you can get some copper solvent welding epoxy stuff? I remember someone used that once.
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