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The FLUIDMASTER INC 510M-001-P10 is a silicone flush valve seal designed as a direct OEM-style replacement for Mansfield 210 and 211 specialty flush valve toilets. This seal addresses one of the most common toilet service calls: a leaking or failed flush valve seat seal. The silicone compound resists chlorine and hard water degradation, offering significantly extended service life compared to standard rubber seals. Licensed plumbers and experienced DIYers install this part as a straightforward repair that restores a leak-free flush without replacing the entire flush valve assembly.
This seal is intended for residential toilet repair applications where the existing Mansfield 210 or 211 flush valve is in place and serviceable. The direct-fit geometry eliminates the need for trimming or modification during installation. It is sold in a pack of 10 units, making it practical for plumbing contractors stocking service vehicles or supply rooms for multi-unit residential properties or repeat service calls.
Designed as a direct OEM-style replacement flush valve seal for Mansfield 210 and 211 specialty flush valve toilets.
Installation is performed by a licensed plumber or qualified service technician. Shut off the water supply to the toilet and flush to drain the tank before beginning any valve service. Remove the existing worn or damaged seal from the flush valve seat, seat the new silicone seal firmly, and verify alignment before restoring water supply. Confirm the tank fills and seats without seepage before closing out the service call.
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