AquaForte Air Pumps AP-Series New series high pressure air pumps. The air pumps have a compact size and a low power consumption. They have a low noise operation. The air pumps have an automatic power-off protection when membranes are worn out. Comes with 9 mm (AP-35 till AP-100) or 12 mm (AP-150 and AP-200) hose tail. Note: Membranes are wear parts and should be replaced annually!