What does polypropylene insert mean in practice?
Chemically neutral PP fibers create a foam, string or pleated structure intended mainly for suspensions.
When does it matter?
The material does not adsorb chlorine and does not soften water, so its effect is limited to the mechanism of the specific structure.
Which solutions are related to it?
The structure, micronization, length and permissible temperature are selected and replaced after a permanent increase in resistance.