Flush Valve Cartridge Kit for 1.0 and 1.6 GPF Pressure‑Assist Toilet Tank Systems

The flush valve cartridge kit is engineered as a direct replacement for Flushmate pressure‑assist systems rated at 1.0 and 1.6 gallons per flush. Designed for Series 501, 501A, 501B, 503, and 504 systems, the cartridge restores proper flow regulation and flushing performance by controlling the release of pressurized water within the vessel. The kit includes all essential components required to correct performance issues such as sluggish flushing, continuous water flow, system non‑setup, and water leakage around the cartridge assembly. As one of the only moving parts inside a Flushmate system, the cartridge is critical to consistent operation and may need periodic replacement after extended use.

Each component in the kit is designed for compatibility with OEM systems and built to withstand the demands of pressure‑assist toilets in high‑use commercial or residential environments. Installation is straightforward—most replacements can be completed in under 15 minutes with basic tools or a Flushmate cartridge wrench. The cartridge kit helps facilities maintain proper flushing force, improve water efficiency, and extend the service life of pressure‑assist systems. It is suitable for hotels, multi‑unit housing, offices, healthcare spaces, and other applications where reliable flushing performance is essential.

• Supports 1.0 and 1.6 gallon‑per‑flush applications.
• Built from corrosion‑resistant materials for long service life.
• Controls regulated water release for consistent flush performance.
• Compatible with both residential and commercial pressure‑assist toilets.
• OEM‑manufactured for proper sealing, consistent flushing, and leak prevention.
• Helps maintain Flushmate system water‑efficiency and bowl-clearing capability.
• Easy installation; cartridge installs with a simple clockwise motion after removal.
• Includes a duckbill valve and a lower supply filter screen for a complete system tune‑up.
• Restores performance issues such as weak flush, continuous flow, or system non‑setup.
• Direct OEM replacement for Flushmate 501, 501A, 501B, 503, and 504 pressure‑assist systems.
• Fits Model Number: M-101526, M-102540, M-101526-F, M-102540-F, M-101526-F3, M-102540-F3, M-101526-F4, M-102540-F4
• Includes: Genuine Flushmate cartridge assembly (1.0 / 1.6 GPF compatible), independent adjustor with a set screw, duckbill valve (upper supply), lower supply filter screen
• Fits Porcelain Brands: American Standard , Briggs, Colcermica, Contrac, Corona , Crane Plumbing, Eljer , Exergis, Gerber , Glacier Bay, Kohler , KooHoo, Laufen , Mansfield , Niagara, Orion , Peerless , ProFlo, Sloan, Seasons, St. Thomas Creations, Universal Rundle, Vitra , Vitromex , Vortens/Lamosa , Western , Winfield, Zurn