How to Change a One-Piece Toilet Flush Valve

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Changing a one-piece toilet flush valve will first require you to go in and remove all the rust buildup. Change a one-piece toilet flush valve with help from a foreman for Lighty Contractors in this free video clip.

Part of the Video Series: Toilet Repair
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Video Transcript

Hello, everyone. I'm Joshua Clement, and today I'm gonna talk to you about how to replace a one-piece toilet flush valve. Now, what happens is over time, a calcium, lime and rust buildup inside your flush valve corrodes it so water slows down or completely stops in that valve. For this job we'll be using a pipe wrench. If you have a pair of vice grips, or something like that, that works too. The first thing we wanna do is carefully remove the back of the tank. Located on the fill valve you'll have a shut off valve. If it's a ball valve like this, you want to give it a quarter turn, to where it's going to cross your line. So you want to make sure that all the water is shut off before removing your fill valve. After that, we're going to remove the fill line located on the back of the tank. A lot of times these are just hand-tightened, so we'll just grab it with our hand, and remove it. After your fill line is removed, you want to take your pipe wrench, and on the back of the toilet tank there is a plastic nut. We're gonna remove that with our pipe wrench. After it's loosened up a little bit, we're gonna push down on our fill valve, and remove that plastic nut. After that plastic nut is removed, we're going to take our pipe and remove it from our overflow, and then simply pull up on our fill valve. Then you can try to match this one if you want to, but a lot of times they're universal, so you can just pick up any fill valve. You'll take it, make sure that the rubber gasket is in place. Place it through the bottom of the tank, take your plastic nut and tighten it back up. Now, as we get closer to the tank, we're gonna press a little bit on our fill valve to help seat that gasket in there, and tighten it up. After we get it hand-tight, we're gonna take our pipe wrench and finish tightening it up. Then, we'll take our fill line and put it back into our overflow. Now, we'll very carefully put the back of the tank back into place, hook up our supply line. Since this is compression fitting, we only have to do it hand-tight. Then, you'll turn your water back on, and see how it works. Doing this simple job can increase the fill time of your toilet very fast, so that way you don't have to wait if you're cleaning out your toilet and want to do a couple flushes. Thank you all for watching, and good luck with this project.

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