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Question: 04-44 Code Section: 7 Date:

OBC 2006 Reference:

Question: Is the pipe manufactured by Wirsbo for distribution systems?  What type of pipe is it and where is it referenced in the code?

Interpretation: (On. Reg. 403/97) Wirsbo tubing is manufactured for distribution systems and is referred to as Aquapex.  The name gives away the type of pipe and that is PEX which stands for Cross-linked polyethylene (PE...polyethylene and X...cross-linked).  The references in the code are in 7.2.5.5.(4) and 7.2.11.2.  You should also check the Appendix for additional information A-21 and for a quick summary A-22.  It must be certified to CAN/CSA-B137.5.

Note: Be careful of other Wirsbo product designed for radiant floor heating called HePex. That product is NOT approved for potable water.

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