plumbing
I bought this valve which I believe is 1/2" IPS:
And I have shower hose that according to Home Depot compatibility board is "1/4 brass pipe" (or "3/8 brass pipe" with the adapter I have).
What adapter do I need to connect that hose to the valve? I guess I am confused how "brass pipe" standard is being called outside Home Depot.
In one hole, and if the seat is open, out the other.
If it doesn't seal well even though you have replace the 'washer' at the end of the stem, a seat grinder will smooth the seat out. Go find a 75 year old plumber, he will have one.
An alternative valve stem packing was a rope like material - the neoprene washers you added are a substantial upgrade.
I haven't re-seated and repacked one of these in at least 15 years but your assembly looks good.
Stock fitting - Male Pipe Thread to sweat (ie, soldered copper) Solder to a section of pipe, screw in, enjoy.
Best Answer
There are countless plumbing adapters made for the seemingly infinite number of combinations a person might want to connect. It's nice when we can find a single fitting that does exactly what was needed, but a home center like Home Depot carries a relatively small selection of adapters. A person can almost always make a given connection by using a combination of two or more in-stock parts. It is not viewed as wrong, improper, nor unprofessional to use a combination of whatever is available to get the job done.
It would be great if you could find a reducing coupling -- that's a part which is female threaded on both sides, but one side is threaded smaller than the other. Sometimes called a bell reducer.
If you can't find a reducer of the right size then try for a reducer where at least the large side fits (ie 1/2 IPS to fit your valve). Failing that, get an ordinary coupler. In both cases you can use a bushing to reduce the final size to match the thread of your hose.
I can't quite tell, but it looks as if the hose has a female connection. I have on occasion seen male-to-male adapters of different sizes. You might be able to find one of these that fits your hose and steps up to, or closer to, the 1/2 target size (and then finish the connection with a coupler). If not then just use a regular nipple if needed.