For a floor sink installed flush with the floor, which feature is required?

For a floor sink installed flush with the floor, which feature is required?

• A. Full grate with attached funnel
• B. Drain trap
• C. Vent cap
• D. Stainless steel finish

Answer: (A)

When a floor sink sits flush with the floor, the important design is that the opening remains a solid, level surface for foot traffic while reliably directing water into the drain. A full grate that covers the entire opening, with an attached funnel, achieves this by preventing objects from dropping into the drain and guiding water smoothly toward the waste opening. The funnel helps concentrate the flow, reducing splashing and the chance of water pooling around the drain edge, which is especially important when the grate is flush with the surrounding floor. A drain trap is essential for any drainage system, but in many floor-sink assemblies the trap is built into the unit, so the feature emphasized for a flush-floor installation is the full grate with attached funnel. The other options—vent cap and stainless steel finish—do not address the functional needs of a flush-floor setup.

When a floor sink sits flush with the floor, the important design is that the opening remains a solid, level surface for foot traffic while reliably directing water into the drain. A full grate that covers the entire opening, with an attached funnel, achieves this by preventing objects from dropping into the drain and guiding water smoothly toward the waste opening. The funnel helps concentrate the flow, reducing splashing and the chance of water pooling around the drain edge, which is especially important when the grate is flush with the surrounding floor.

A drain trap is essential for any drainage system, but in many floor-sink assemblies the trap is built into the unit, so the feature emphasized for a flush-floor installation is the full grate with attached funnel. The other options—vent cap and stainless steel finish—do not address the functional needs of a flush-floor setup.