type L or type K copper pipe is used for hot water heating?
Which type of copper pipe are you using for hot water heating system, type L or type K?
M,L,or K is approved along with others
Originally Posted by housecarer
Any of the pipe that feeds the radiation, and after the pressure regulator can be type M, which is a thinner wall, and a little cheaper.
Codes may be different in your area.
m oe l copper is normal in most cases
k is over kill IMHO
I would use type L copper for a boiler system. Type M is too thin in my opinion. You may not have trouble with type M, however; I enjoy the piece of mind with using type L.
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If a new install, I'd look into pex tubing with "homeruns" to each hot water outlet from a manifold, especially in a large home. Can be a big energy saver.
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While pex can be utilized for some parts of the system, it is limited by most codes with how close that it can be to the heating appliance.
Originally Posted by tipsrfine
According to the UPC and UMC, type M copper can be used where the system is not exposed to normal operating conditions over 100 psig.
In my opinion, type M can be used on residential hydronic heating systems safely. I will not use it on domestic water piping or commercial heating systems. I also will not use any copper on steam.