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Gravity fed toilet cistern-no water feed.

The toilet cistern is gravity fed and there is no water coming through into the cistern. The float valve seems Ok so it may be a blockage in the pipe. How can I resolve this problem?

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First I would disconnect the supply line and see if I have water to that point. If so, than take apart or replace the ballcock or float valve. If not continue to trace problem backward untill found. Hope this helps.

Posted on May 13, 2010


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Posted on Jan 02, 2017


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3378513.020 Toilet - The toilet only flushes on the second or third time and it no longer flushes quickly but has to have the handle held down completely until it flushes. What to do?

Not sure about your exact model, but while being more in the electronics / electrical / computer field, I have done a few home repairs to our toilet cisterns with the same fault.
Older cisterns use a small float attached to a lever.
When water is full this L-shaped lever presses a rubber ball shaped grip against the plunger shaft, with shaft and its attached washer seal fully down, plugging the outlet.
The toilet is flushed, brass shaft with its seal-washer is lifted by the linked handle, so water level drains and drops mini-float, which in turn rotates the 'L' away from the shaft, allowing gravity to drop the shaft/seal again.
So if its this system, renew rubber, and check that float still floats.
Newer cisterns such as the one now at home appear to have a float in the center of a large plastic housing.
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We have fitted a new ballcock on the watertank (cold) since then we have little cold water

Are you sure the ballcock is correctly adjusted to fill the tank to the required level? The float should have a screw on it which changes the height at which the valve is closed. if set too low you may not get enough head of water to feed the system. If set too high the tank will overflow.

This video deals with a toilet (WC) cistern but the principal is the same for any ballcock valve system.

How to adjust the cistern ballcock in your WC cistern get better flush

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The float valve needs adjusted or replaced.

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The toto toilet keeps running over the overflow tube in the tank. I cleaned the valve which worked for a while but now is back to running. Should I replace the gravity valve?

If you can lift the float arm and it stops the water flow into the tank then the float arm needs to be adjusted. The proper adjustment will stop the water flow when the level is between 3/4" and 1" from the top of the overflow tube. The newer style valves have an adjustment screw that is easily located and can be adjusted without any dis-assembly.

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What are the disadvantages of Concealed Cistern Toilets.

The biggest disadvantage is that they are more complex than the standard gravity fed toilets. More parts, more things that can go wrong. However, they generally operate just as trouble free as any other fixture.

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My toto toilet has both 1.6 gal and 6 gal flushes. the short flush doesn't go down.

I am not a toto expert but i think i understand the gravity control toilet concept.A gravity flush tank type toilet flushes do to the force of water traveling from the tank to the bowl in a small passageway and forces the water in the bowl towards the integral trap in the toilet.In other words the water isnt dumping quick enough or the passageway is restricted.,My guess is the flush valve isnt dumping all at once.

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just lower your float a little further. otherwise i'd adsume air is leaking out of your float. but if your float is up in the shut off position and water is still coming out. then you need a new assembly.

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Toilet cistern doesn't fill up

it sounds like one or more of your shut off valves has a glog from hard water calcium. were from indiana its a big problem here.To check this u will have to shut off main water supply and remove top of shut off valve and check for white crusty blockage, even if u see a few particals its present. It can severely restrict flow.

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