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Question DetailsAsked on 9/22/2014

why does my toilet water tank fill slowly

Why is our toilet tank filling so slow? Our toilet just started filling really slow. If we take the hose off the fill pipe and let the water flow outside the fill pipe it fills faster but the bowl water is low then and we know that is not the answer. Any ideas?

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I am assuming that the water is NOT flowing out of the tank and that is why it is filling fast - if that is the problem, then you outlet flapper valve needs to be fixed so it seals correcttly after flushing.


OK- so water is flowing out the bowl filler tube so it does not appear to be a problem with the incoming water from the shutoff valve and flex tubing - so sounds like a fill valve issue.


If you have an old mechanism with the black or brass float ball hanging off a long rod from the valve mechanism at the toilet trigger, like this -

http://www.wikihow.com/Image:Toilet_f...

then try moving the float ball down further (without forcing it) to see if it fills faster - sometimes it gets corroded up a bit and hangs up the fill valve. Also make sure the ball is not hanging up on something - it needs to be able to drop freely on the arm to open the fill valve. If not the remedy, then you might have to replace the fill valve (parts cost maybe $15-40 depending on brand and model, and on whether you can readily get an after-market tower type floatto replaceit - or get a plumber to do it.


If the more modern fill tower type like this -

http://www.wikihow.com/Image:Toilet-t...

then try moving the float up and down on the shaft a bit, again without forcing anything - sometimes the fill valve clogs up with a bit of grit and this will free it up. Otherwise, unless you are quite a DIY'er and want to take it apart to see if the needle valve is working right inside, probably need to replace it - about $15 for parts typically - or a plumber for about $100-150 typically to replace it, as with fill valve above.

Answered 5 years ago by LCD




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