Collection: String Wound Water Filters

String Wound Sediment Water Filters

String wound cartridges are built by winding polypropylene cord tightly around a rigid center core in a crossing pattern. The result is a depth filter with a dense structure that traps dirt, sand, silt, and rust as water works its way from the outside of the cartridge toward the core. Because the cord is wound rather than pressed, the cartridge holds its shape under pressure and resists collapsing as it loads with sediment.

Sediment is not only a matter of what is visible in a glass. Fine particles that never show up to the naked eye still reach fixtures, and they are what leave a gritty feel after a shower or dull laundry after a wash cycle. A string wound cartridge installed where water enters a home, or ahead of a drinking water system, takes that load out before it spreads through the plumbing.

Micron rating is the specification that matters most in this category. It describes the size of the particles a cartridge is designed to trap, and the value varies between manufacturers, so the rating printed on the cartridge is the number to compare rather than an assumption based on how the filter looks. Coarse ratings handle heavy grit with less restriction on flow, while finer ratings catch smaller particles and load up faster on dirty water. Cartridge length and diameter also have to match the housing for the filter to seat and seal correctly.

String wound cartridges come in a range of sizes and styles, sold singly or by the case for a household that goes through several in a year. They are consumables, and falling pressure at the tap is the usual sign that one has done its work. A subscribe and save plan keeps replacements arriving on a set interval, so a loaded cartridge gets swapped before it starts to restrict flow.