How to fix a slow filling toilet tank

It's recommended that you first try to flush out the fill valve to remove any possible debris before deciding to fully replace it. Start by locating the water shutoff valve, which is normally positioned near the back of the toilet.

Turn it clockwise to stop the water flow and flush the toilet to remove most of the water from the tank. To access the fill valve, grip and hold the shaft of the cap on top of the valve. With your other hand, twist the cap and lever arm counterclockwise to remove it.

Depending on the specific valve, you may need to push the cap down while twisting it off. Once it's removed, the fill valve will be exposed for cleaning.

Push button toilet cistern not filling up

To flush out the fill valve, put a small cup upside down over the valve opening to prevent water from getting everywhere, and then turn the water supply back on. The sudden flow of water should help dislodge any sediment or debris that may be keeping the valve from properly functioning.

After cleaning, reattach the cap by twisting it clockwise to secure it in place and flush

toilet tank slow to fill after flushing

toilet tank very slow to fill up