An indirect waste producing a fair amount of discharge can create a dangerous if not toxic environment.
Floor sink above floor.
It is similar to a floor drain as it is installed flush with the floor but has a much larger chamber to receive the indirect wastes and does have a strainer as called for in the plumbing code in addition to the grate.
The reason they terminate above the floor line is to stop their use as a floor drain.
Floor sinks are also larger than most floor drains 12 inches by 12 inches where drains are usually 4 or 6 inches in diameter.
Watts drainage products fs 720 series 8 x 8 x 6 in.
If you were to terminate an in direct waste to an open site drain that was also used as a floor drain that drain could easily become clogged with dirt and trash.
Sanitary floor sinks are used to receive surface drainage in areas where sanitation is a priority such as institutional kitchens and hospitals and to drain indirect waste from various sinks lavatories condensate drains and other equipment.
49320a nb series super flo septor floor sink shown installed in a heavy duty structural concrete finish floor.
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Sioux chief squaremax 3 in.
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Floor drains in laundry rooms mechanical rooms and bathrooms generally allow the whole floor to drain into them if the floor is sloped correctly where a floor sink is usually flat and flush with the adjoining floors.
The receptor pictured is a pvc floor sink which can be obtained at a reasonable price.
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49580a nb series super flo septor floor sink shown installed in a poured concrete floor on the ground level.
Fatmax pvc round floor sink.
While the round top will be compatible with most floors a square top design is available for.
Floor mount cast iron floor sink.