Fixtures & Water HeatersQuestion 199 of 360
When setting a floor-mounted water closet, the connection to the closet flange must be made:
a.with plumber's putty only
b.watertight and gastight, typically with a wax ring or approved gasket
c.using silicone caulk around the base as the only seal
d.by threading the bowl directly onto the drain
Explanation
The water closet must seal to the closet flange with a wax ring or listed gasket so the joint is both watertight and gastight. The bowl is then bolted down evenly to the flange. A poor seal leaks water and lets sewer gas escape at the floor.
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