Dive into the 2026 Massachusetts Plumbers Journeyman Challenge – Master Your Pipes and Make Waves! Flash Cards

Question: 1 / 400

When does frost closure make it necessary for a vent extension through a roof to be at least three inches in diameter?

?

When temperatures drop below freezing

Next
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy