Ceramic Filter Cartridge, washable, re-usable. Rating: 0.2 micron-Size: 1/4″ thread. Flow: approx 20Ltrs/min depending on pressure. ALL water sources – tank water, where Giardia & Crypto Cysts are an issue. Caravaners-twin filter system or stand alone. The ceramic filter candle can filter thin molecules & bacteria. The candle will be blocked by foreign matter & must be cleaned. When the flow decreases, clean or replace the candle. Wash with a scraping cloth under running water to remove foreign particles. NO soap or solvents. If water flow is restored,OK. If not, replace the candle.