Further Explanation section, under the Volume Performance Test Section, 5th bullet point, replace: "Place a bucket or a flow-measuring bag marked for 24 ounces (0.71 liter) underneath the selected hot water fixture." with:

"Place a bucket or a flow-measuring bag marked for 0.6 gallons (2.27 liter) for non-circulating systems or 0.25 gallons (0.95 liter) for circulating systems underneath the selected hot water fixture.""