M-101526-F41 Sloan Flushmate® Complete Replacement System for FM IV 504 Series Two-Piece ToiletThe Sloan M-101526-F41 Flushmate System is a complete pressure-assist flush system for 504 series tanks. It fits porcelain manufacturers Lamosa 3468 and Vorten 3468 tanks.The system includes:VesselLower Supply NutTank NutFlushmate-to-Tank 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®.