Fixture Installation Flashcards
6 cards from real 306A practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Fixture Installation flashcards as text
What is the standard rough-in measurement for a residential water closet from the finished wall to the centre of the closet flange?
Answer: 12 inches (305 mm)
The standard rough-in for most residential water closets is 12 inches (305 mm) from the finished wall to the centre of the closet flange. Toilets are manufactured to match this measurement.
What type of wax seal is recommended for a water closet installed on a flange that is below the finished floor level?
Answer: Extra-thick wax ring or stacked wax rings
When the closet flange sits below the finished floor surface, an extra-thick wax ring or stacked wax rings are needed to bridge the gap and create a proper seal between the toilet horn and the flange.
What is the correct height for a wall-mounted lavatory in a residential bathroom?
Answer: 800 mm (31 inches) from floor to rim
A wall-mounted lavatory is typically installed at 800 mm (31 inches) from the finished floor to the top of the rim, providing a comfortable height for most adults.
What is the minimum centre-to-centre distance between two adjacent water closets?
Answer: 760 mm (30 inches)
The minimum centre-to-centre distance between two water closets is 760 mm (30 inches) to provide adequate space for comfortable use and maintenance access.
When installing a bathtub, what must be done to protect the subflooring?
Answer: Install a waterproof membrane or liner under and behind the tub
A waterproof membrane or liner must be installed under and behind the bathtub to protect the subflooring from water damage caused by splashing, condensation, and potential leaks.
What is the purpose of a 'trim kit' when installing a shower valve?
Answer: To provide the visible handle, escutcheon plate, and showerhead or spout connection on the finished wall surface
The trim kit includes all visible components — the handle, escutcheon (cover plate), and connections for the showerhead or spout — that are installed after the wall is finished, covering the rough-in valve body.