The Retro-Air Rejuvenator System from Septic Services provides a complete drainfield rejuvenation system designed to help return a failed septic system back to optimal flow and performance. It can be used in new or existing septic systems, and can be installed in single- or multiple-compartment septic tanks. It helps eliminate clogged drainfield biomat  and is recommended in aeration systems that are prone to backup. It is easy to install and requires minimal maintenance. It is available in several models to fit various applications. 800/536-5564; www.retro-air.com.