A sediment filter is usually the first stage in a multi-stage water filtration system. Its main function is to remove physical particles from water before it reaches other filters or your tap.
Removes visible, solid particles from water such as:
Sand
Silt
Dirt
Rust flakes
Other debris
Prevents clogging of other filters (carbon, RO membranes) and protects appliances like water heaters, washing machines, and dishwashers.
Commonly made from polypropylene (PP)
Types include:
Melt-blown (spun): Dense, compact material – standard option
Pleated: Higher surface area – can sometimes be rinsed and reused
String-wound: Ideal for well water or heavy sediments
Measures the size of particles it can filter out
Common sizes: 1, 5, 10, 20, 50 microns
Lower micron = finer filtration
Example: 5 micron removes more particles than 20 micron
Larger micron sizes allow faster flow but less filtration
Smaller micron sizes filter more but may reduce water pressure
Most filters are disposable
Some pleated filters can be cleaned and reused once or twice
Often installed in a clear filter housing so you can visually monitor dirt buildup
Whole-house systems (POE)
Under-sink filters (POU)
Reverse osmosis (RO) pre-filters
Well water filtration
Replace every 3–6 months (depending on water quality and usage)
Office water filtrationSigns it needs replacing:
Drop in water pressure
Visible dirt/darkening in the filter
Bad smell or taste in water