To get your toilet tank to fill up faster, start by fully opening the wall supply shutoff valve behind the toilet to ensure maximum water flow. Second, shut off the water, remove the fill valve cap assembly, and clean out any calcium sediment or debris clogging the internal inlet filter screen. Third, if your fill valve is old and restricted internally, replace it with a modern high-flow universal fill valve model. Verification: Time a refill cycle with a stopwatch to confirm the tank fills completely within 45 to 60 seconds.
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