What does filter before the softener mean in practice?
Protects the head and resin against sand, rust and sediment that may block the water meter, injector or dispensers.
When does it matter?
Too fine or small insert limits the rinsing flow, which indirectly worsens the regeneration of the softener.
Which solutions are related to it?
Large area and moderate accuracy are selected, and the pressure drop is also controlled during maximum drawdown.