- Indicator of pollution - Large amount of water flow - Dirt drain at filter bottom for coarse dirt - Temperate display for measuring the actual water temperature - Different filter materials (special filter sponge, Japan matting) - Filter materials are simply pressed out by means of a shoving-system
Measurements - distance to inlet, measured from bottom to the hole centre - 31 cm Measurements - overflow stages 1-2, measured from bottom to the hole centre - 29 cm Measurements - distance to outlet, measured from bottom to the hole centre - 26 cm