Low Pressure Pipe System

How the System Works

A Low Pressure Pipe (LPP) System is a type of drain field that includes a lift station (also called a pump tank). Only treated wastewater enters the lift station. The pump sitting in the bottom of the tank pumps the wastewater out of the tank and into the LPP system. The LPP system is comprised of a series of PVC pipes with small holes drilled in precise location along the pipes. These pipes are called laterals. They are installed in narrow trenches filled with gravel about 10-18" below the ground. The wastewater is pumped through the system and exits the laterals through the holes to be percolated into the ground.


  • Eventually the pump in your system will fail and must be replaced. These pumps generally last around 8-12 years. If the alarm in your system has been activated this is normally an indication that the pump is no longer functioning.
  • The tank may need to be cleaned out to remove any sludge that has escaped the treatment tank. Sludge in the drip tank can ruin the pump and possibly the entire drip system.
  • Over time, sludge and algae build up in the line and stop up the emmiters. It is important to have your LPP system flushed every 2 years to remove any blockages and ensure the system continues to work properly.