M-101526-F42 Sloan Flushmate® Complete Replacement System for FM IV 504 Series Two-Piece ToiletThe Sloan M-101526-F42 Flushmate System is a complete pressure-assist flush system for 504 series tanks. It fits porcelain manufacturers Kohler K-4484, Mansfield 153, Peerless 1, St. Thomas/Vitromex, Vitra 5066, ProFlo, Glacier Bay and Western T4ULF-PF-1 tanks.The system includes:VesselLower Supply NutTank NutFlushmate-to-Tank GasketTank-to-Bowl GasketNOTE: The Flushmate® system is not designed to work as a replacement or upgrade for a conventional toilet. This unit is intended to be sold as a replacement system for an existing Flushmate®.