The pre-filter is used in twin systems to protect your post filter. Working like a sieve, it removes dirt, rust, sludge and other foreign objects picked up by your water as it travels through kilometers of assorted asbestos, concrete or corroding galvanized metal pipes on its way to your house. This enables your post filter to reach its full life expectancy without being clogged. Good quality polyspun pre filters are graduated and thus work by catching large particles in the outer layers and the finer further in.
CHANGE 6 MONTHLY