A weighted average

What this property does not cover

On this page14

Not what the Act prohibits Not where it applies Not the exemptions Not the certification Not the effective dates Not any computation Not which surfaces are wetted And not whether any article is lead free Nor whether any container is suitable for potable water What is here is the definition and three findings in it Plus which of the ten articles is a wetted surface And a container shelf, measured on its own axis Three things, and two of them come from two sentences References

Two sentences, quoted.

Not what the Act prohibits

The definition is quoted and the prohibition is not. What may not be introduced into commerce or used, and by whom, is outside these pages.

Not where it applies

Which installations and which uses are reached is part of the scheme and is not described.

Not the exemptions

There are circumstances in which the requirement does not apply and none of them is set out here.

Not the certification

How compliance is demonstrated, and by what third party, is not described. NSF and similar certifications are not federal.

Not the effective dates

The figures in the definition have a history and this property quotes the current text without describing it.

Not any computation

A weighted average over wetted surfaces is computed for a particular assembly and no computation is performed here for anything.

Not which surfaces are wetted

Which depends on how an article is installed. The descriptions in this property are the ordinary function of each article, not a determination.

And not whether any article is lead free

That is a measurement about a specific product, and nothing on these pages establishes it.

Nor whether any container is suitable for potable water

Which it is not being asked to be. These are storage jars for small parts, not plumbing components.

What is here is the definition and three findings in it

That lead free is not zero, that the two figures differ with the tighter one on solder, and that the fitting figure is an area-weighted average.

Plus which of the ten articles is a wetted surface

Which divides the group on a question about water contact rather than about size or material.

And a container shelf, measured on its own axis

Which for a plumbing part is storage temperature and moisture rather than anything to do with lead.

Three things, and two of them come from two sentences

Which is a high yield for a definition that short.

References

42 U.S.C. 300g-6(d), the definition of lead free. For solder and flux, "not containing more than 0.2 percent lead". For pipes and fittings, "not more than a weighted average of 0.25 percent lead when used with respect to the wetted surfaces of pipes, pipe fittings, plumbing fittings, and fixtures." This is a definition from the Safe Drinking Water Act; nothing on these pages describes what the Act prohibits, where it applies, the exemptions, the certification or the effective dates, or determines whether any article is lead free. law.cornell.edu

42 U.S.C. 300g-6(d) applies its 0.25 percent figure as a weighted average with respect to the wetted surfaces of pipes, pipe fittings, plumbing fittings and fixtures. So the measure is area-weighted across the surfaces in contact with water rather than applied to each component or to the mass of an assembly. No computation is performed on these pages for any assembly.

Written from 42 U.S.C. 300g-6(d) and from the catalog as it stood on 19 October 2026. That is a definition from the Safe Drinking Water Act and nothing here describes what the Act prohibits, where it applies, the exemptions, the certification or the effective dates, or determines whether any article is lead free. A weighted average over wetted surfaces is computed for a particular assembly and no computation is performed here. This shelf is shared identically by nine groups and the sewing notions property enumerates the inventory.