October 8, 2020

When and where should you use a carbon filter?

You can use a carbon filter coconut shell carbon in several places. It can be used for point-of-entry (POE) to filter the whole house or point-of-use (POU) to clean water before you drink or cook with it. Some shower heads include carbon filtration to prevent you from inhaling chlorine gas in the shower. Carbon filters are also part of a reverse osmosis system or an ultrafiltration (UF) system. A carbon filter added to a UF system provides organic and chemical particulate reduction along with lead reduction.

If you use a water softener to soften water treated by a municipal plant, then you should install a carbon filter before the water softener. If chlorine is removed prior to softening, then the softener resin lasts longer. Chloramines can cause O-rings, gaskets, and rubber seals to deteriorate, so removing chemical disinfectants with catalytic carbon helps water-using appliances, like your tankless water heater, last longer.

Learn more about an ultrafiltration membrane or how a water softener works.

How often should you change your carbon filter?
Change your carbon filter every six months to one year. Never use a carbon filter for longer than one year. Waiting to change the filter could make your water worse than it was before treating it. If the pores of a carbon filter are full, collected particles will begin to break from the carbon and flow into your water supply.

Is a carbon filter effective?granular carbon
Carbon filters are excellent at removing chlorine and other disinfection by-products like trihalomethanes and bad tastes and odors. Some are rated to reduce other contaminants by filtering them mechanically. However, if your water contains high levels of inorganic compounds and dissolved solids, use a reverse osmosis system to treat it.