Thank you for your review on the Delta Prelude Round Front Toilet.
I am so sorry to hear that the fill valve is filling your tank slowly. I will be more than happy to assist you with this issue. There is a filter within the valve which may need to be cleaned as debris may be present. Please try the below steps to clean the filter and the tank should fill normally again:
The filter is located inside the fill valve shank and requires periodic cleaning.
Shut off the water supply valve, then remove the water supply line from the fill valve shank.
Remove the filter from the inner portion of the shank with needle-nose pliers.
Clean the filter screen with water and a soft brush.
Re-install the filter back into the inner portion of the shank.
Ensure all fittings and end connections are free of debris. Re-connect water supply line to the shank of the fill valve and hand tighten, then tighten one additional turn with wrench. Make sure you do not over tighten. Turn on water at the supply valve and check for leaks.
To see a visual representation of these parts, please view the maintenance manual for this fill valve at the below link:
Please feel free to give us a call if we can help with anything further at 855-345-1345.
Delta Faucet Company
Date published: 2017-08-15