Final answer:
The maximum horizontal spacing for PVC drainage pipe depends on various factors, such as pipe size and local building codes.
Step-by-step explanation:
The maximum horizontal spacing for PVC drainage pipe depends on the size and type of the pipe. In general, the standard spacing for PVC drainage pipes in horizontal applications is 4 feet to 10 feet. However, this can vary depending on local building codes and specific project requirements. It's best to consult the appropriate regulations and guidelines for accurate spacing recommendations.