Fixture clearance, connection, and venting requirements for common plumbing fixtures tested on licensing exams.
30 cards · basic cards · AI-written, checked twice. Edit anything.
- Minimum clearance in front of a toilet for proper access
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18 inches from the center line to any wall or fixture- Minimum bathroom width when a toilet is present
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30 inches- Minimum side clearance on each side of a toilet
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At least 15 inches from toilet center line to any wall- Minimum clearance in front of a pedestal sink
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18 inches- Minimum counter depth clearance in front of kitchen sink
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24 inches- Minimum side clearance for each side of a bathtub
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At least 12 inches on each side- Minimum clearance required in front of a shower stall
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24 inches- Minimum trap seal depth required by code
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2 inches- Maximum trap seal depth allowed
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4 inches- Required slope for drain lines and trap arms
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1/4 inch per foot of horizontal run- Maximum slope allowed for horizontal drain lines
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1/2 inch per foot- Maximum distance from fixture trap to vent opening
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8 feet measured along the trap arm- Minimum height vent pipe must extend above roof
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12 inches- Minimum distance from vent terminal to windows, doors, or air intakes
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10 feet horizontal distance and 3 feet above the opening- Type of fitting required when connecting fixture drains to main stack
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Sanitary tee or wye fitting; never 90-degree elbow
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