What is the size and termination point of the water draw-off line in an all-weather tank?

The correct choice specifies that the size of the water draw-off line in an all-weather tank is 3/4 inch and that it should terminate 1/2 inch from the bottom of the sump. This configuration is important for efficient function and proper maintenance of the tank system.

Using a 3/4 inch size for the water draw-off line allows for a sufficient flow rate to effectively remove water from the tank, which is crucial for operational efficiency and for preventing any buildup of contaminants. Additionally, terminating the line 1/2 inch from the bottom of the sump helps ensure that the system does not draw any particulates or sediment that might accumulate at the very bottom. This placement helps maintain water quality and prevents potential damage to the system caused by sediment being drawn into the supply line.

In summary, this answer encapsulates optimal design principles for maintaining clean and efficient water systems within the context of all-weather tank operation.