Date
Inquiry
Is the use of PEX piping equivalent to insulating pipes with R-4 insulation? 3/8" PEX piping does not require insulation because there is a very small volume of water left in the pipes when not in use.
Ruling
No - PEX piping is not considered equivalent to pipes with R-4 insulation.
Updated 10/1/13 for rating system applicability.
Internationally Applicable
On
Campus Applicable
Off