This fact sheet details how to use slow-release tank chlorinators—simple, low-maintenance devices that safely disinfect stored water using chlorine tablets or granules. Designed for community-level storage tanks, the chlorinator is a passive, cost-effective solution for reducing bacteria and viruses in drinking water. The guide includes considerations for installation, dosage adjustment, water quality requirements, maintenance, and safety. Ideal for practitioners and decision-makers, this resource helps assess feasibility and improve water safety in resource-limited or emergency settings.