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Toilet tank won't fill up or is slow to fill. The most common reasons for a valve to slow down or no longer fill the tank after the flush are debris issues and the length of time a valve has been in use. ... Valves in use for a period of 7 years or more can have their working parts start to wear out. 1.
https://www.fluidmaster.com/toilet-problems/remove-fill-valve-cap-replace-seal-toilet-wont-fill-slowly-filling-tank/
Remove and clean the flush valve and the flush valve seat(it is the flap that opens up to allow water to flush the toilet). Once the edges of the valve and the seat are cleaned, possibly with "0000" grit bulldog steel wool, it should not leak anymore. To make sure it is not leaking, once tank has refilled completely, put some food die in the tank. If, after 10-15 minutes, the water in the toilet bowl is colored, you have a leak from the flush valve. Replacing the flush valve is very easy - just bring the old one with you to the hardware/plumbing store and ask for a replacement. Blessings and good luck!!
Fill the breather hole (1/8" hole) inside the flapper.This is designed to let air out so the flapper will sink. Now it floats longer letting in more water. 25%percent more in my case.
Is the flapper valve slow to return to the closed postion allowing water to flow through the flush valve? Make sure the toilet flapper is moving freely and is sealing properly against the flush valve. If there is no lengthy or continual water flow in to the toilet bowl then this is not the problem.
Is the water valve on the water fill line to the toilet tank fully open? This may seem silly but it could be this simple.
Check to make sure your fill valve is opening fully. If you have an older toilet there may be some deposits that need to be cleaned way to allow free movement.
If toilet does eventually fill to the desired level, there is no leakage, water valve on fill line is fully open and fill valve is opening fully then recommend you shut off water supply, drain toilet and disconnect water fill line from the water valuve and toilet tanke to make sure there is not a blockage. If the water line and connections are clear you may need to remove the fill pipe in the tank and check for blockage. If this is very old, conisdering the cost and effort, it may be simpler to replace at this time rather than trying to extend the life.
If you have a supply shut off to fixture shut it off and disconnect supply line from inlet to toilet . If your supply line to toilet is a flexible line then bend it so that you can direct water to small container. Slowly turn valve on to see what flow rate is at that point. If flow rate is not good then I would shut water off to house and replace valve. If flow rate to toliet is good I would reccomend you replace flush vallve. To do this shut off water supply to toilet. Disconnect supply nut to bottom of flush valve. There will be a retaining nut that holds flush valve in place in toilet tank. Remove flush valve after removing fill tube from flush valve to overflow tube. Replace with toto replacement valve or use Fluidmaster 400A. Instructions on box of 400A are easy to follow and if you have flex connector you won't need supply line washer. I would reccomend that before you install new valve that you put rubber gasket on shank of valve and slid it about halfway up the shaft. Make sure that inside of tank is dry and use a small bead of silicon caulking on top and bottom side of shaft gasket. slid gasket the rest of the way on valve shank,install in tank and put on retaing nut hand tight. Push down on top of valve and using channel lock pliers finish tightening nut securely.You may need to reach into tank and grasp valve body to stop it from turning. There are other things you can do if you have a working supply valve. Shut off valve and remove screws that hold top of valve in place and remove and clean surfaces. You can turn valve on slowly to help flush out any rust or mineral deposits. I hope this is of some help to you. Thanks
Hi,
Usually the problem is dirt in the fill valve and not an adjustment problem...
depending on which valve you have it can be taken apart and cleaned out... just remember to turn off the water supply before taking the fill valve apart...
There's a lot of variety in the works in the toilet tank. Assuming this is not a pressure-assisted toilet-----First understand the three valves are:
1. The shutoff valve - on the supply line coming into the toilet tank.
2. The fill valve - inside the tank, opens with the float descends, closes when the tank fills up.
3. The flush valve - inside the tank on the bottom. Common old style is a flapper on a pivot. Yours may operate straight up and down rather than on a pivot.
Three very common problems are----
1. The chain that connects the handle to lift the flush valve is getting caught, not allowing the flush valve to close.
2. There is problem with the flush valve being able to get a good seal when it closes - could be debris or misalignment.
3. The fill valve is not closing when the tank is full, could need adjustment or there is debris preventing the valve to seat.
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Here's are some steps to diagnose---- close the shutoff valve. Wait a few minutes as you watch the level in the tank. If the water level decreases, you have problem with the flush valve.
To confirm the fill valve as the problem, turn the shutoff valve back on. Lift up on the float that is supposed to turn off the fill valve. If it shuts off, you should be able to adjust it - most have a +/- plastic adjustment screw. But if raising the float by hand only slows it down, you have problem with the seating of the fill valve - which can sometimes be cleaned, but more often would need to be replaced.
I hope this is helpful. Thanks for using FixYa.
Remove the tank lid and look at the fill valve. Is it a yellow valve?
This fill valve is common on the Toto Toilets and can easliy plug with debrie.
They can be disassmbled and cleaned. however, I usually just replace the valve with Fluid Master Fill valve.
You will also want to check the water coming into the toilet by turning off the water that supplies the toilet and disconnecting the water supply line. After removing the water supply line turn on the water at the valve to make sure that the water is flowing properly. Check the supply line also to make sure it is not plugged.
Be sure and place a small container to catch the water that will come from the valve. A towell will also help from making too much of a mess.
If the Supply line and the valve are clear the problem is in the fill valve.
The G-Max system denotes the Flushiing system which is a 3" flapper that allows the water from the tank to flow into the bowl quicker.
Good Toilets!
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