Power, reliability, and performance-engineered for pond owners who demand more from their windmill aeration system. The Replacement OWS Windmill Compressor is built with BalCam II technology, delivering up to 4.5 CFM at 30 PSI-that's nearly three times the airflow of older models. The result? Stronger aeration, healthier water, and thriving fish populations. Crafted with a stainless-steel crankshaft and eccentric bearings, plus pillow-block sealed bearings, this compressor is designed for rugged, long-term performance. Unlike older units that wear down and demand constant upkeep, the OWS compressor minimizes friction and extends service life. It's also engineered for easy upgrades-compatible with all OWS windmills and most Canadian models, with flexible fittings to match your existing airline setup. At just 54 lbs, it's heavy-duty but manageable for installation. And with a 5-year warranty, you get peace of mind knowing your investment is protected-no hidden risks, just reliable performance season after season. If you're ready to cut downtime, reduce maintenance headaches, and give your pond the oxygen it needs, this is the compressor that delivers.