Are you looking for a pipe nipple?

 

No, a replacement spout that will fit the existing pipe in the tub/shower.

 

Ok, now I see your issue. Looks like a 1/2in threaded galvanized male nipple. You need a threaded spout.

Do you need a diverter one? Does this also run a shower?

 

Ok, now I see your issue. Looks like a 1/2in threaded galvanized male nipple

So a tub spout advertising fits a 1/2” pipe will work?

 

It should, they are standard. Looks like your current one threads are all worn out. That's probably why it's not tightening down properly anymore and leaking.

Don't forget the pipe tape for the threads and silcone for any sealing of gaps you may have so water doesn't get behind/in the wall cavity. Hand tighten only, no need to go crazy tight with a wrench.

 

Ok thanks very much. I swear I’ll never understand how plumbing pipes are measured/ specified

 

Partly because there are many types of materials and connection methods. Different materials mean different thicknesses for the same strength/leak resistance. So the inside diameter is the one that controls how much water flows, but the outside diameter is the one that determines how they are connected to each other (usually). Obviously those will be changing depending on whether you have lead, ABS, PVC, copper, iron, PEX, what have you.

It's ironic that the very word "plumbing" derives from the Latin word for "lead", because that was the only material they used back then, so plumbing meant lead work. And now, lead is not even allowed and yet it's still called plumbing.

 

I know, there are so many different types and terminology.

Hope that helps.

 

Prior to installation I suggest cutting a 5/16 inch square notch (if not already there) in the bottom most part of the rim of the new tub spout where it meets the wall. This is to drain out any water that might get behind the spout and prevent water getting inside the wall.

Lots of shower faucets and valves do not have a diverter control for the shower. Simply blocking the spout (what a spout with a built in diverter can do) activates the shower.

 

You have the old one in your hand, how about going to ACE and letting the plumbing guy help you find the same one?