The best build-up remover (Starts faster than other build-up removers!)! Safe for toilets & septic systems! Uses natural enzymes to help: unclog build-up; car clogs & slow drains. Safe for all pipes, toilets & septic systems. Contains no phosphorus. A family company since 1886. - Fisk Johnson. www.drano.com. www.scjohnson.com. Questions? Comments? Call 800-558-5252 or write Helen Johnson. Learn more at: www.scjohnson.com. Facts You Can Feel Good About: Recyclable container where facilities exist.