The screening in the pump vault must have a minimum wetted open area of:

The minimum wetted open area of 12 square feet for the screening in the pump vault is important for ensuring that the system operates efficiently. This specification is designed to promote adequate flow and prevent clogs or blockages within the septic system. A larger wetted open area allows for better filtration, accommodating the necessary volume of water while providing sufficient surface area for the wastewater to pass through without creating excessive pressure or resistance.

Maintaining the 12 square feet minimum helps to ensure that solids are effectively removed from the liquid before it is pumped, which in turn protects the pump from wear due to debris and enhances the longevity and reliability of the septic system. By adhering to this requirement, septic installers can ensure that the system functions effectively and reduces the likelihood of failure or costly repairs in the future.