To adjust the grade on a flush valve WC, which component is adjusted?

To adjust the grade on a flush valve WC, which component is adjusted?

• A. Flush valve body
• B. Adjustable faceplate
• C. Fill valve
• D. Seat nut

Answer: (B)

The amount of water released in a flush (the flush grade) is controlled by the opening and timing of the flush valve, which is adjusted with the adjustable faceplate. This part sits at the bottom of the tank and directly governs how much water flows during the flush by changing the size of the opening or the duration of the flush. By turning the adjustment on the faceplate, you can increase or decrease the flush volume to get the desired performance. The other components have different roles and aren’t used to set the flush grade. The flush valve body contains the moving parts but is not adjusted for how much water is released. The fill valve handles refilling the tank after flushing and restoring the tank level, not the amount of water in a flush. The seat nut simply secures the valve to the tank and is not involved in setting the flush quantity.

The amount of water released in a flush (the flush grade) is controlled by the opening and timing of the flush valve, which is adjusted with the adjustable faceplate. This part sits at the bottom of the tank and directly governs how much water flows during the flush by changing the size of the opening or the duration of the flush. By turning the adjustment on the faceplate, you can increase or decrease the flush volume to get the desired performance.

The other components have different roles and aren’t used to set the flush grade. The flush valve body contains the moving parts but is not adjusted for how much water is released. The fill valve handles refilling the tank after flushing and restoring the tank level, not the amount of water in a flush. The seat nut simply secures the valve to the tank and is not involved in setting the flush quantity.