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-   -   difference b/ween L (blue - expensive) and M (red - cheap) copper pipes (http://www.diychatroom.com/f7/difference-b-ween-l-blue-expensive-m-red-cheap-copper-pipes-10292/)

amakarevic 07-30-2007 06:14 PM

difference b/ween L (blue - expensive) and M (red - cheap) copper pipes
 
what is the difference in application ?

i am replacing my old galvanized steel radiator pipes with copper and was wondering if M will suffice. all that flows through is hot water.

thanks,

- a

bigMikeB 07-30-2007 06:44 PM

Type "M" is used for heating and type "L" is for potable water. The difference is wall thickness, "M" is thinner and is fine at reduced pressures (less than domestic street pressure). You can also get "BT" which is bending temper to use less fittings. If you think "L" is expensive price out "K".

amakarevic 07-30-2007 09:05 PM

so you are saying that M will be fine for men (heating), correct ?

i am confused that potable water uses thicker pipe than is used for heating. i would think it is the other way around.

amakarevic 07-30-2007 09:15 PM

that may read funny - i meant to write "suffice for ME" not "suffice for MEN" :laughing:

bigMikeB 07-31-2007 06:28 PM

Quote:

Originally Posted by amakarevic (Post 55382)
so you are saying that M will be fine for men (heating), correct ?

i am confused that potable water uses thicker pipe than is used for heating. i would think it is the other way around.

Heating runs at much lower pressures than city water and the air and minerals are removed from heating water and a coating of iron oxide (the black sludge) coats the inside of the pipe which technically lubes the inside walls of the piping.


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