HIBLOW's HP Series of air pumps are well suited to a wide variety of applications, from septic systems to koi ponds. These pumps serve to keep the water oxygenated and circulated, which is absolutely vital to maintaining a healthy pond or septic system. Due to their relatively small size and power consumption, they produce very little heat, which along with their weatherproof design and built-in thermal overload protection allows these pumps to have a long operational lifespan. The HP Series operates extremely quietly and efficiently, with sound levels ranging from 32 to 45 decibels, depending on the model. Additionally, with their robust design, these pumps can handle depths of up to 10 feet. Includes a 90° rubber fitting and each pump is backed by a 1-year manufacturer's warranty.