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Toilet tank fills only when sink is turned on

Asked Oct 11, 2007, 06:45 AM — 6 Answers
Hello-

A problem has developed in the past few days with my toilet. When I flush the toilet, the water goes down but the tank fails to fill up. When I turn on the bathroom sink, the toilet tank begins to fill and will continue to fill after the sink is turned off. Basically, turning on the sink triggers the toilet tank to fill up.

Any thoughts would be appreciated.

Thanks.

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6 Answers
speedball1's Avatar
speedball1 Posts: 27,670, Reputation: 9541
Senior Plumbing Expert
  
#2

Oct 11, 2007, 07:19 AM


What type of ballcock do you have? Float ball on a rod or a can on a wire?
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Eric in Mahwah's Avatar
Eric in Mahwah Posts: 14, Reputation: 5
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#3

Oct 11, 2007, 05:24 PM
If I were to say float valve no ball would that help?
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ballengerb1's Avatar
ballengerb1 Posts: 25,642, Reputation: 11296
Home Repair & Remodeling Expert
  
#4

Oct 11, 2007, 05:52 PM


If you don't have a ball then you probably have a black can shaped float that rides straight up and down, correct? Tom will do the rest tomorrow.
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Eric in Mahwah's Avatar
Eric in Mahwah Posts: 14, Reputation: 5
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#5

Oct 12, 2007, 06:27 AM
Correct, black can shaped float that rides straight up and down.
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speedball1's Avatar
speedball1 Posts: 27,670, Reputation: 9541
Senior Plumbing Expert
  
#6

Oct 12, 2007, 07:40 AM


Quote:
Originally Posted by Eric in Mahwah
Correct, black can shaped float that rides straight up and down.
OK! You have a FluidMaster ballcock,(see image) that needs a new #242 seal,(see image). If you need instructions on how to change out the seal click on, Fluidmaster | Troubleshooting | Questions and Answers and scroll down to #5. Good luck, Tom
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Eric in Mahwah's Avatar
Eric in Mahwah Posts: 14, Reputation: 5
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#7

Oct 12, 2007, 09:26 AM
Seems to work perfectly now. Thanks. Would you care to explain how changing the seal would fix the problem? Seems a bit strange to me. Thanks if you have time.
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