What does chlorinator mean?
A chlorinator is a mechanical device designed to introduce chlorine into water, most commonly to keep swimming pools, hot tubs, and municipal water supplies safe from bacteria and algae. The word belongs firmly to the practical vocabulary of pool ownership and water treatment: homeowners speak of installing an automatic chlorinator or switching from floating dispensers to an in-line unit, while engineers discuss industrial-scale chlorinators at wastewater plants. Chlorinators range from simple tablet feeders that dissolve chlorine slowly into pool water, to gas-fed systems used by city utilities, to saltwater 'chlorine generators' that convert dissolved salt into chlorine on demand. The word carries no strong emotional connotation — it is neutral, functional, and technical — but it names equipment with real public-health importance, since chlorinated drinking water has dramatically reduced waterborne disease worldwide. Anyone maintaining a pool or reading about water infrastructure will encounter this term regularly.
nounA device or apparatus that adds chlorine to water, typically used to disinfect swimming pools, drinking water, and wastewater.
- A device that adds chlorine to water for disinfection (as in pools, spas, or municipal water systems).
"The pool's chlorinator keeps the water free of bacteria all summer long."
"We installed an automatic chlorinator so we no longer had to measure tablets by hand."
"Municipal treatment plants use industrial-scale chlorinators to disinfect drinking water before distribution."
Regular plural; used when referring to multiple units or devices.
"The facility operates three large-scale chlorinators in parallel."
Without the humble chlorinator, your backyard pool would turn green within days — it quietly does one of public health's biggest jobs.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of chlorinator
Chlorinator derives from the verb chlorinate plus the agentive suffix '-or', meaning 'a thing that performs the action.' The root traces back to 'chlorine', coined in the early 19th century by British chemist Humphry Davy from Greek 'chlōros' ('pale green'), describing the element's yellow-green color. Related forms include chlorinate, chlorination, chloride, and chlorophyll, all sharing the same Greek root.
How chlorinator is actually used
A practical, technical term common in pool maintenance, plumbing, and water-treatment contexts; neutral in register. In saltwater pools, a related device called a 'salt chlorine generator' is often loosely referred to as a chlorinator.
Easily confused with chlorinator
Chlorine is the chemical element itself, while a chlorinator is the mechanical device that introduces chlorine into a system such as a pool.