Proline Aerated Bottom Drain, 4"

Alternative to the Spindrifter bottom drain (1" Duct) - Includes 1" direct air feed connector supplied. This allows the air supply hose to enter the sump independently of the water outlet pipe, thus eliminating the possibility of restriction to the water flow and somewhere else for blanket weed to attach. Strong, well designed construction. For CONCRETE pond fit - supplied without the liner flange kit (available separately)