Written by IAPMO• July 1, 2025• 10:17 pm• Code Quiz

Code Quiz | Third Quarter 2025

Questions related to the 2021 UPC Study Guide, 7, Sanitary Drainage 

Except in single-family residences, drainage stacks 3 stories or more in height serving ______ are considered suds-producing fixtures.

Drainage connections shall not be made into a drainage piping system within _______ of any vertical to horizontal change of direction of a stack containing suds-producing fixtures.

Vertical drainage lines connecting with horizontal drainage lines shall enter through a ___________________.

The maximum fixture units allowed on a 4-inch horizontal drain with a 1/8 inch per foot slope is _______________.

Questions related to the 2021 UMC Study Guide, 7, Combustion Air

The remaining space surrounding a chimney liner, gas vent, special gas vent, or plastic piping installed within a masonry, metal or factory-built chimney shall not be used to supply combustion air except for _____ where installed in accordance with the manufacturer’s installation instructions.

The One Permanent Opening Method requires the equipment have a clearance of at least _____ inch(es) from the sides and back.

Combustion air is not required for __________.

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IAPMO develops and publishes the Uniform Plumbing Code®,the most widely recognized code of practice used by the plumbing industry worldwide; Uniform Mechanical Code®; Uniform Swimming Pool, Spa and Hot Tub Code®; and Uniform Solar Energy, Hydronics and Geothermal Code™ — the only plumbing, mechanical, solar energy and swimming pool codes designated by ANSI as American National Standards — and the Water Efficiency Standard (WE-Stand)™. IAPMO works with government, contractors, labor force, and manufacturers to produce product standards, technical manuals, personnel certification/educational programs and additional resources in order to meet the ever-evolving demands of the industry in protecting public health and safety.

Last modified: July 1, 2025

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