This fact sheet introduces the T-chlorinator—an in-line device that uses solid chlorine tablets to disinfect drinking water without electricity. It can be installed on hand pumps, pipe systems, or before storage tanks to ensure microbiological safety. The resource covers installation, effectiveness, maintenance, flow-rate considerations, and sourcing of tablets. Suitable for rural or off-grid communities, this guide supports users and implementers in choosing, operating, and maintaining low-cost water treatment systems.