Moen’s M•Dura heavy-duty manual flush valve features the company’s Accuset piston technology that requires virtually no maintenance or replacement parts for the life of the flush valve. Accuset is a self-cleaning filter which protects the piston seals against clogs and damage from line debris, allowing it to fully function even if the filter is up to 90% clogged. It’s ideal for all commercial applications, regardless of water pressure variances because Accuset can operate with pressure as low as 15 psi.