I have a pressure gauge with a 3/8" threaded fitting (it was connected to an adapter with a compression fitting but I’m not going to use that). I want to connect it to a 1/2" or 3/4" iron pipe tee fitting like this. I see reducers to connect two male pieces of different diameter, but I need an adapter that is 3/8" female on one end (to receive a 3/8" male) and 1/2" male out (to go into 1/2" female). What do you call that?
A reducer?
Like this?
Yeah, that’s it! All the reducers I saw had two female ends. Thanks!
Where I come from, that is called a pipe bushing, or a pipe bushing reducer.
Any good plumbing or hardware retailer should have it.
If you will use it with any gas like natural gas or propane, it needs to made of either brass, or black pipe, not cast iron or galvanized pipe.
{Bolding mine}
I think that the answer was given in the earlier posts but wanted to clear something up.
Although the threads of a compression fitting looks like the threads of NPT fittings (the threads on the tee posted by you), they are not the same. So a “male” compression side will not fit into a NPT female fitting.
You will have to buy a fitting with compression on one side and NPT on the other end.
Bolding mine:
it was connected to an adapter with a compression fitting but I’m not going to use that
Thanks–this is for a steampunk lamp project, so all that matters is that things fit.
Cool! May we see the end result? I like steampunk.
Sure. I’m still in the concept stage, never did anything like this before. All I have right now is the gauge and trying to figure out the overall design.
Sounds good and looking forward to pictures of your project. If your project involves complicated shapes, then compression fittings (although more expensive) will give you lot of leeway to orient things. If you want to stick to NPT fittings, then consider using a few unions in place of couplings.
I forgot to come back to show the finished product.
Nice! Does the knob actually turn the light on/off?
Yes. Inside the valve is a momentary switch, so when you turn the handle it engages the switch, then when you turn the handle the other way it releases it. I don’t think this is an optimal design because if you keep turning the handle, you are using mechanical advantage to apply a large force which can smash the switch. But it was the most reasonably priced thing I could buy without having to make one myself from scratch. I considered it but it’s kind of a big job when you’re only making one.
That looks good. Thanks for posting the finished product.