This system can only be used with pressure assisted toilets from American standard, urn, Gerber and crane or replacements for same model EcoFlush units. We are the original manufacturer of the EcoFlush pressure assisted flushing system. In addition, it can also be compatible with replacing Sloan flush mate models:M101526f3hgk m101526f3hmk m101526f3hckEcoFlush uses a patented flushing technology that harnesses the supply line water pressure and stores it in an engineered pressure vessel. Once the handle is tripped to flush, high-pressure water flow is discharged into the toilet bowl to create an ultra efficient and high-powered flush to your toilet. Our product is tested and certified by cup and csa for the highest in quality.