While hydraulic load testing (HLT) of onsite wastewater systems isn't a requirement during the sale of a home, it's been a common practice in many areas. Besides time-of-transfer requirements, HLT can be used to check systems for other reasons, says Ray Erb, president of Thomas H. Erb & Sons in Lititz, Pennsylvania.The test simulates real conditions to determine if the effluent is moving through the system properly and if the soil dispersal area is absorbing the effluent as it should. “In the case where the homeowner would like to increase the size of their home with the addition of a bedroom and
