Essential for construction sites and maintenance gangs. Water discharged to EA-accepted levels. Dewatering Filter will remove 2.5L oil and 20kg sediment. Where contamination is more serious, use pillows first - each pillow absorbs and retains 1L oil. Pillows contain our smart polymer which turns oil and fuel into solid rubber so it can't leak out. Empty and reuse filter up to 20 times or until integral oil detector turns dark blue. Standard COSHH disposal.