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Fixing A Slow-Filling Toilet Tank


slow filling toiletA slow filling toilet tank is frustrating. You flush the toilet and five minutes later the water is still running to fill that tank. Assuming the float in the tank is set correctly, I would focus on either the water supply valve or the toilet fill valve. In my experience, the problem is usually with the fill valve. The fill valve is connected to the water supply line that exits the wall beneath the toilet tank.

The very first thing to do is to make sure that the water supply valve (aka angle stop) at the wall is opened fully. If it is opened only partially, this explains why you would get a low flow of water to the toilet. Turn it counter-clockwise until it stops. If it is already fully opened, you need to test it to make sure it is not clogged. Turn the valve off and disconnect it from the bottom of the tank (this is where it connects to the toilet fill valve). Point the hose into a bucket and open the angle stop you should get good water pressure spraying into the bucket. If not you can replace the angle stop to fix the problem. If you have good water pressure, I would replace the fill valve.

A fill valve can get choked up with scale and slow the flow of water. The next step to fix the problem is to replace the fill valve.


Now how do you create a slow-filling toilet. Back off the water supply valve so it only open half way. Can you also block the holes along the stem of the fill valve? Because the new Fill Valves are so fast, seems like 2x fast, as old one that it is causing water toilet hammer.
Posted @ Saturday, August 20, 2011 6:14 PM by Andrew
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