Question 85

The minimum size for a copper water service from the meter or control valve to the building shall be 3/4 inch.

The minimum size required for a copper water service line to ensure adequate water flow and pressure is 3/4 inch. This size is generally accepted in plumbing codes to effectively meet the needs of residential buildings.

A) 1/2 inch

A 1/2 inch service line is insufficient for most residential applications as it may not provide adequate flow rates and pressure, especially during peak demand times. This size is typically used for smaller fixtures rather than the main service line.

B) 5/8 inch

While a 5/8 inch line may be used in some instances, it is still below the minimum requirement for a main water service line. This size could lead to reduced water supply and pressure issues in larger fixtures and appliances.

C) 3/4 inch

3/4 inch is the minimum size stipulated for a copper water service line. This size is designed to provide sufficient water flow and pressure for typical household needs and is compliant with plumbing standards.

D) 1 inch

Although a 1 inch line would provide ample water flow and pressure, it exceeds the minimum requirement. This size may be more suitable for larger buildings or applications requiring higher water demand, but it is not necessary for standard residential service.

Conclusion

The correct answer is 3/4 inch, as it is the minimum size required for copper water service lines to ensure adequate water supply to residential buildings. Other options, while they may be used in specific contexts, do not meet the established minimum standards and could lead to inefficient water delivery.