Water Filtration Systems

No filter removes everything

The useful way to think about filtration is that each type has a job, and buying by price or by claim rather than by job is how money gets wasted.

Sediment filters remove particulates: grit, rust, sand. Nothing chemical. Usually first in a chain, protecting what follows.

Activated carbon removes chlorine, taste, odour and many organic compounds. It is why filtered water tastes better. It does little for dissolved minerals, hardness or nitrates.

Reverse osmosis removes the widest range including dissolved solids. It is slow, it wastes water making what it produces, and it strips beneficial minerals too.

Specialist media exist for specific contaminants: iron, sulphur, arsenic and others.

A real water quality problem often needs two of these in sequence rather than one doing everything.

The filter you forget is worse than none

Every cartridge has a rated capacity, and past it the filter does not simply stop working.

Material trapped in a spent cartridge sits directly in the flow path. Carbon that has reached capacity can begin releasing what it captured. A sediment filter loaded to the point of restriction reduces flow to everything downstream.

And none of this is visible. The water looks the same on the day the cartridge expires as it did on the day it was fitted.

Which means the practical specification for a filtration system includes something rarely discussed: how easy it is to change. A housing that is accessible, with a bypass, gets serviced. One that requires shutting the house off and moving furniture does not, and an unserviced filter is not doing what you paid for.