SpudFiles

i found some cheap grade X copper on ebay but i don't know what the X means, could someone please enlighten me... and yes i have used google.

ive never heard of it. it probably means that the seller doesnt know what kind it is, so he just put an X there.

like chemical X, you dont know what x is, but you know it exists.

or x+3=24. again, you dont know what x is, but you know it exists.

If x+3=24, x=21, so we do know what x is in that case.
What he has is something more like x=y+q

The only grades of copper pipe that I know of are: air conditioning, DWV, M, L, and K. The seller probably just doesn't know what kind it is. All are good for pressure though.

DYI wrote:If x+3=24, x=21, so we do know what x is in that case.
What he has is something more like x=y+q

The only grades of copper pipe that I know of are: air conditioning, DWV, M, L, and K. The seller probably just doesn't know what kind it is. All are good for pressure though.

cool if its good for pressure i will probably buy it.

It could mean 10, as in the roman numeral. Or it could just be made of adamantium.

cool if its good for pressure i will probably buy it.

With copper, unless you have something that can put out more pressure than a shock pump, you don't really need to worry about the pipe. Some of the larger DWV fittings are only rated for about 250 psi though.