Which of the following is NOT a component of the drain-orifice assembly?

Which of the following is NOT a component of the drain-orifice assembly?

• A. Valve
• B. Strainer
• C. Orifice plate
• D. Gasket

Answer: (A)

The drain-orifice assembly is built to control and protect the drainage path: the orifice plate provides the calibrated restriction that sets how much condensate can pass, the strainer catches debris to prevent clogging the orifice, and the gasket seals the joints to prevent leaks. A valve isn’t part of this assembly because its role is to actively control or shut off flow, which is a separate device in the drain line. The valve is used to start or stop drainage, while the orifice assembly handles the fixed flow characteristics. So, the component not part of the drain-orifice assembly is the valve.

The drain-orifice assembly is built to control and protect the drainage path: the orifice plate provides the calibrated restriction that sets how much condensate can pass, the strainer catches debris to prevent clogging the orifice, and the gasket seals the joints to prevent leaks. A valve isn’t part of this assembly because its role is to actively control or shut off flow, which is a separate device in the drain line. The valve is used to start or stop drainage, while the orifice assembly handles the fixed flow characteristics. So, the component not part of the drain-orifice assembly is the valve.