Weatherproof Outdoor Pond Air Pump Perfect for ponds up to 17,000 litres (13,200 if keeping fish and 6,600 if keeping koi). Includes all fittings & AccessoriesThis pond air pump offers tremendous value for money. With premium aluminium build quality air pumps like this usually cost a lot more. Not only that but this pumps comes with fittings, airline and air stones so you can get it working straight out of the box! The air pump is weatherproof and is designed to work outdoors 24/7 in all weathers. It is worth noting that a 4-way chrome manifold is include in the scope of delivery. This manifold offers four \'ports\' for airline to be connected - the user can choose how many to run at any one time. Taps on each \'port\' allow the user to fine-tune the amount of air dispensed.