True or False: Per the UPC, a floor drain trap in an infrequently used space is protected against evaporation with a trap seal primer.
Not quite. The answer is A: True
Trap seal evaporation is a physical process: a floor drain that is rarely used loses its water seal and lets sewer gas into the room. The UPC's answer is a trap seal primer delivering periodic makeup water, unless the authority having jurisdiction decides one is unnecessary for safety or sanitation.
Reference: UPC 2021 §1007.1 (Trap seal protection)
Checked against the official text
Checked against the 2021 UPC text. Washington's exam is written against the 2015 edition, which we have not read for this section, so confirm it against your 2015 book.
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