Is a water softener compatible with a biological waste tank, cesspit or septic tank?

You can use a water softener with a septic tank, cesspit, package sewage treatment plant or biological waste tank. The brine is safely disposed of.

The slight increase in sodium levels from softened water can be beneficial to the bacteria in septic tanks or sewage treatment plants.

Typical types of waste disposal

Cesspits work by storing sewage for a period until they are emptied by the municipality. They don’t release waste to the ground. Typically, cesspits are cleared every month.

Septic tanks hold the sewage for a longer period of time than cesspits. Heavier solids sink to the bottom of the tank and bacteria break them down until they become liquid. This process is called anaerobic digestion.

Liquids in the tank are washed through a drainage field of underground piping and released back into the surrounding soils.

Shared or more sophisticated systems

Biological waste tanks can be shared between several houses and they use a bacterial process that breaks down the waste on a larger scale.

Alternative domestic waste treatment is referred to as Packaged Treatment Plant. This system aerates the sewage.

These systems are more commonly found in America and research has been carried out to over a number of years to see if softened water affects these types of treatment.

The American Water Quality Association confirmed softened water doesn’t reduce their efficiency in any way.

Trial a Harvey water softener with your system. 

Back to top