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It depends on the size of PVC. For smaller PVC you can buy fittings that glue onto the PVC and allow a thread x barb fitting to be installed. For larger pipe you should get a brass compression fitting that clamps down on the PVC and adapts to a thread x barb fitting.
Yes, this is often done in well systems by using a mechanical fitting on both. ie, a fitting glued to the PVC, that can be threaded onto the galv. pipe.
You can't. There is no fitting to do this. Galvanized has to be threaded.
No, you'll need to put a pipe adapter on the PVC, then use a standard PEX crimp fitting. Or you can use a SharkBite fitting. They work well for this.
It should, are you sure your pvc pipe is round
No, do not use glue. Use teflon tape or pipe dope on the threads. You should also make sure you always put the male PVC thread into the female metal thread. If you do it the other way you will tend to split the PVC fitting when you tighten the threads.
You can not glue brass directly to PVC pipe. Use male/female adapters to join these two materials. ie, a male threaded PVC end fitting glued to the PVC pipe and a female threaded brass fitting screwed onto that.
You can often find a modern connector such as Sharkbite or Qwest fitting to do this.
You need each piece to have a threaded end fitting, one male, one female.
Sweat a female fitting on the copper or use a compression coupling between the two.
A fitting that makes it possible, for example, to glue a piece of 2" pipe into a 3" fitting (if you have a 3" x 2" bushing, that is).
Term used with cast-iron, PVC, CPVC and ABS pipe. Cast-Iron; The plain end of a cast-iron pipe. The spigot is inserted into the bell end of the next pipe to make a water tight joint. PVC, CPVC or ABS; A male end of a fitting the same size as the pipe that is inserted into the slip (hub) end of a fitting.