Code Tech Logo

Question: 08-14 Code Section: 7 Date: 10 May 2008

OBC 2006 Reference:,


Question: Recently a question has arisen concerning the use of Type L soft copper for use in fire service mains. says both, Type K and L soft copper can be used in a water distribution system. In Table, the chart only mentions Type K. Our question is ‘Why Type L soft copper is excluded from Table ?’

Interpretation: The trouble with Type L goes way back to the times when flared joints were a common method of connections. Type L would not flare well without splitting. is for "the distribution system" and refers to "service pipes“. Therefore, the restriction for Type L as a service pipe is identified in the body of the code in Table The new Code requires only Type K for services.....ALL services... not just fire mains as the question mentions. Also take note of the requirements of for joining of copper underground.

Interpretation: Approved at AMES 2008 

Copyright 2016 Ontario Plumbing Inspectors Association, Inc.