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Resolved Running Toilet/Replaced Diaphragm

handyman•10/24/2025
Resolved Running Toilet/Replaced Diaphragm - Image 1
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Diagnosed and repaired a running toilet issue by replacing the damaged diaphragm in a Sloan Optima flush valve. The old diaphragm was compromised, causing water to continuously run. After researching the problem and identifying the correct replacement part (1.6 gpf, not 1.28 gpf), I successfully disassembled the flush valve assembly, replaced the diaphragm, and reassembled the unit. The repair resolved the running water issue completely.

Technologies

Plumbing RepairToilet MaintenanceDiaphragm ReplacementSloan OptimaWater Conservation

Step-by-step progression

  1. Identified the problem

    Researched the running water issue and determined the diaphragm was damaged. Found helpful resources including YouTube tutorials to understand the repair process.

    Watch tutorial video

  2. Purchased correct part

    Bought the correct diaphragm replacement part - Sloan EBV-1024-A for 1.6 gpf (not 1.28 gpf) flush valves.

  3. Turned off water and disassembled

    Shut off the water supply and carefully disassembled the flush valve assembly to access the damaged diaphragm.

  4. Replaced diaphragm

    Removed the old, damaged diaphragm and installed the new replacement part.

  5. Reassembled and tested

    Reassembled the flush valve assembly, turned water back on, and tested to confirm the toilet no longer runs continuously.