Some 5/8” faucet seats for Tracy may in fact be 39/64”

Some of the following plumbing parts sold by a leading hardware store
by a leading plumbing parts wholesaler who’s name begins with W may be
defective in the following way:

Water heater connectors made of copper may have been manufactured too
thin and may leak after a few months.

Brass nipples may have a smaller diameter causing them to pop out of
their connectors.

Flare nuts may not fit their flare connectors.