Plastic chambers are becoming a standard in onsite treatment leachfield design. However, installers are often on their own when it comes to construction details, especially with pressurized septic systems. Many chamber manufacturers simply do not have standard designs for ports and other details. Photo A shows a standard completed drainfield with the vaults almost ready to backfill. The laterals have sweeps at both ends with threaded caps for squirt testing and lateral cleaning. Conventional ports use 4-inch risers with slip caps. The port bodies are slotted to fit over the laterals to bring the laterals to grade. This conventional port
