Air compressor help

[musicformybumhole]

Hi, I have just purchased a new tyre inflator, but it does not fit my compressor hose.
I believe I might have purchased a euro fitting but my airline is possibly 1/4" BSP.
I tried to swap the fittings from my old inflator into the new one, however the threads on my new inflator are smaller, so the BSP will not screw in.
Does anyone know if there is a BSP fitting that would screw into a Euro thread?

TIA

[kambites]

I think you're confusing the air-line fitting standards with the threads.

BSP stands for something daft like "British Standard Pipe" and is a definition of thread dimensions used in plumbing. I suspect those two fitting you show have something like 3/8 inch BSP and 1/4 inch BSP threads. Note that a 1/4 inch BSP thread is not a quarter of an inch across, it's a thread designed to fit around a compression fitting for a 1/4 inch pipe so it's considerably bigger.

The other end, the airline fittings themselves, are bloody confusing because there's loads of them which look very similar. The one on the right is what I have, it's usually called a "Euro" fitting; the other one I'm not sure what it is.


You probably need to take the fitting off the tool; work out what thread type the tool has on it; then buy a Euro connector with that thread size to screw onto the tool. The easiest solution might be to take the tool into an air-line shop so you can try fittings until one screws in properly. Worth noting that whilst the rest of the world uses BSP, the US uses its own thread standard so if it's a US market tool it's possible it'll be weird.

Edited by kambites on Monday 5th November 18:57

[Mikey G]

I have an air line that had that exact fitting, couldnt change it for the PCL fittings I use due to an odd thread, so the only way I could do it was by putting a piece of rubber air hose over the fitting in the inflator and on that I put a barbed adapter fitting so it will connect to my air lines.

Edited by Mikey G on Monday 5th November 19:14

[Easternlight]

Take the fitting out and try to see if it's a tapered, If so It will be NPT which I have found to be much more widley used than BSP in such applications.

All the pipe threads are a PITA as they tend to be very similar, some are even the same TPI for a given size and the taper angles are the same (1in16) so the only differance is the angle on the form of the thread 55 or 60 degrees.

Doesn't matter much for home use as you just put aload of PTFE tape on it and it's fine!