What is the appropriate minimum spacing of a low pressure pipe system?

The minimum spacing of 5 feet on centers for a low-pressure pipe system is correct because it provides adequate separation between pipes to ensure proper distribution of effluent and to minimize the risk of interference between adjacent lines. This spacing helps to maintain the functionality of the system by avoiding any potential issues with clogging or pressure variations that could result from pipes being too close together.

Additionally, maintaining this distance allows for easier access for maintenance and monitoring of the system, which is crucial for its long-term performance. Proper spacing is an essential aspect of septic system design to prevent overcrowding and to ensure that the soil absorption field can adequately treat the wastewater.

The other options may suggest spacing that is greater than required or does not align with standard practices in low pressure pipe installations, which have specific requirements based on design and environmental considerations.