How a Septic System is Installed | This Old House

The biological treatment septic system gets installed at the Westerly house. SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse. It’s time for the sophisticated septic system to be installed at the Westerly house. The 1500 gallon primary and secondary tanks are buried into the ground. Installer Rick Pezza shows Richard Trethewey the steps, starting with a filtered pump that draws liquid in short cycles from the second tank to a treatment pod. In this pod, the dirty liquid drips down over hanging filter sheets filled with microorganisms that convert the ammonia into nitrogen. Through this biologic process, nitrogen gas gets released into the atmosphere, oxygenated water returns to the main tank, and the remaining treated liquid goes down through the sand filtered field. Looking for more step by step guidance on how to complete projects around the house? Join This Old House Insider to stream over 1,000 episodes commercial-free. https://bit.ly/3bnWadr Plus, download our FREE app for full-episode streaming to your connected TV, phone or tablet: https://bit.ly/34RYEP5 About This Old House TV: This Old House is the No. 1 multimedia home enthusiast brand, offering trusted information and expert advice through award-winning television, a highly regarded magazine, and an information-driven website. This Old House and Ask This Old House are produced by This Old House Ventures, LLC and are presented on PBS by WETA Washington, DC. Follow This Old House and Ask This Old House: Facebook: http://bit.ly/ThisOldHouseFB Twitter: http://bit.ly/ThisOldHouseTwitter Pinterest: http://bit.ly/ThisOldHousePinterest Instagram: http://bit.ly/ThisOldHouseIG How a Septic System is Installed | This Old House https://www.youtube.com/user/thisoldhouse/