When using a floor sink installed flush with the floor, it must have what?

When using a floor sink installed flush with the floor, it must have what?

• A. Full grate with attached funnel
• B. Strainer basket
• C. No vent
• D. A standpipe

Answer: (A)

The important idea here is that a floor sink that sits flush with the floor needs a complete cover that also helps control the flow of water into the drain. A full grate that sits over the entire opening provides a solid, safe surface and prevents objects from dropping into the drain. The attached funnel is essential because it guides the water and any debris directly down into the trap, reducing splashing and helping keep the surface area around the drain cleaner and less prone to standing water. This combination ensures both safety and proper drainage when the sink is level with the floor. A strainer basket isn’t suitable for this setup because it wouldn’t provide the same full-area coverage and direct funneling of water into the drain. A vent isn’t part of the top-cover requirement for a flush floor sink, and a standpipe is related to how the drain line or trap is configured rather than the cover and funnel at the surface.

The important idea here is that a floor sink that sits flush with the floor needs a complete cover that also helps control the flow of water into the drain. A full grate that sits over the entire opening provides a solid, safe surface and prevents objects from dropping into the drain. The attached funnel is essential because it guides the water and any debris directly down into the trap, reducing splashing and helping keep the surface area around the drain cleaner and less prone to standing water. This combination ensures both safety and proper drainage when the sink is level with the floor.

A strainer basket isn’t suitable for this setup because it wouldn’t provide the same full-area coverage and direct funneling of water into the drain. A vent isn’t part of the top-cover requirement for a flush floor sink, and a standpipe is related to how the drain line or trap is configured rather than the cover and funnel at the surface.