pressure relief valve

The PA6SW can be used in ponds up to 3/8 of an acre in size and 7' deep or less

And if you have sludge and muck at the bottom

Please note that costs will vary depending on location

Kasco Tech-Aire 1/4 HP Aeration Compressor Surface Aerators pressure relief valveKascos Teich Aire Rocking Piston Compressors are continuous duty, oil free, aeration compressors that are a great choice for aerating ponds and other deep water applications. Whether run intermittently or continuously, these rocking piston aeration compressors will deliver reliable and efficient performance day in and day out. The compressor has a 6 ft. power cord, thermal overload protection, and a ramped internal valve plate that allows for restart