A liquid biological enzyme treatment for the maintenance and restoration of domestic and commercial drains and pipes. It promotes the natural breakdown of organic residues, oils and fats, improving water flow and reducing unpleasant odours. Suitable for drains in kitchens, bathrooms, laundry rooms, septic tanks, cesspits, soakaways and grease traps. For slow-draining drains, pour approximately half a bottle directly into the drain (preferably in the evening) and leave to work overnight; for maintenance, use 100–200 ml of the product periodically in domestic and commercial drains.