Thank you for your question regarding the Delta Turner® Elongated Dual-Flush Toilet C43908D-WH model. You should not need to press and hold the flush buttons to allow for more water to flow into the tank.
You may need to make an adjustment on the "legs" of the switch, RP91469, to allow for the button to push all the way down so the toilet will flush properly.
Please visit the link below to view the Parts Diagram for this model:
Please feel free to call, email, or message us on social if there is anything else you need.
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Date published: 2019-07-02