How Toilet Fill Valves Work

The modern toilet is a genius invention that we cannot live without. In this video, we take a look at how toilet fill valves work. Knowing how fill valves work will help beginners troubleshoot and fix problems.
@HacksbyDad

Video 3 of a 3-part series.

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[susanhipsley]

I watched several videos before finding this one, so I had a basis for comparison. This guy blows the others out of the water! Such a clear, concise explanation, and I appreciated that he spoke slowly enough to be able to absorb the info. Tx HackDad!

[grmhk]

Thank you for your straightforward and concise explanation. Blows my mind how smart this invention is 👍🏻

[josephmyers]

Finally, someone explained the importance to have an air gap between the overflow tube and the fill tube. That is why one of our guest toilets was not refilling. Somehow the fill tube was pushed down into the overflow tube. Thank you for your expert explanation. True teachers are hard to come by these days.

[montygreen]

This was one of the best plumbing videos I found. He did an amazing job explaining everything and what they do!!! I was able to fix my toilet because of this video. Thank you!!!

[marymagdalene]

Nice and straightforward explanation of how things work. Kind of a whole semester's work in toilet mechanics in one video, but takes a lot to get it all down, to be sure. I loved that in just a few words "Dad" gave me the info for which I searched: How to get water level in tank higher. Turn the adjustment screw "left" to lower the water level and "right" to raise it. Brilliant!

[RobertKilzer]

Very clear video and description. Because of you, I went to Lowe's paid $3.48 (+tax) for Fluidmaster part #242, and thanks to your video, I did it myself. I figure you saved me about $100. Thanks!

[framistan]

I never knew that the tank refills from the bottom of the valve assembly tube! Toilets are more complex than I imagined! Thanks for the excellent video.

[desireelococo]

Explained logically. Finally. Tried another video and the person talked so fast! This one was perfect.

[danraats]

Thank you for this very clear explanation of how this component works. Very helpful!

[roxyluvlife]

Thank you. You just relieved my weekend anxiety of calling a plumber because toilet bowl adjuster was low and needed to be raised to flush adequately.

[ekaterinayakubova]

This was so helpful and I fixed my faulty fill valve in seconds. Thank you!!!!

[HellScream]

This video was incredibly helpful and informative. It helped me resolve two fill value issues on separate toilets in my house. I wish more DIY videos were direct, accurate, and easy to follow.

[katherines]

Thank you so much for this video! I was able to fix the toilet by myself! 😁

[kissmyaxe]

This is literally the most amazing video. Exactly what I needed to be able to understand what’s wrong

[serge]

This the one that helped me!!

Thanks you!

[BALASTE]

Thank you, I was two days away to Replacing the whole toilet for a new one.

[jmaietta]

Great videos - your detailed walk through was very helpful!

[babur]

Thank you sir for your marvelous explanation.

[dolbodolb]

Thanks for the detailed explanation. I've "fixed" dozens of toilets over time but didn't know exactly how the refill valve fills both the tank and the bowl. I just got a brand new toilet with exact same design and the water level is very slowly and silently rising until it reaches the overflow pipe. Something must be wrong with the refill valve as it is probably not sealing properly and there is a slow leak. And I also noticed there's water dripping from the top of the refill valve into the tank immediately after the toilet is flushed. Then it stops. Perhaps the pressure is too high and some excess water is shooting through the top lid.

[supernumiphone]

I was hoping for an explanation of how the internals of the value work. Opening it up it doesn't seem like it should do anything.