A noticeable delay or pause before your toilet begins filling with water after a flush is usually caused by a sticking fill valve float mechanism or a slow-reacting diaphragm seal. When the flush handle is pulled, the float may hesitate before dropping down to trigger the valve open. Alternatively, low incoming water pressure can create a delayed response as the pipes struggle to initiate flow. Verification: Observe the float arm immediately after a flush to ensure it drops instantly and opens the valve.
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