Replacing a float valve in a toilet tank involves turning off the water supply to the toilet, draining most of the water out of the water closet, removing the malfunctioning part and installing the new float valve. Find out how to fix a toilet float valve with tips from a master plumber in this free video on bathroom maintenance.
Hello my name is Brent Miller and today we're going to talk about how to replace the float valve in the back of a household toilet. This is a new float valve that I purchased at a hardware store and they cost about $10. They need to be replaced about every 10 to 15 years because they wear out but the very first thing you need to do is you need to shut off the water to the toilet and you shut off the supply line. It is usually on the back left near the floor of the toilet and you'll need to shut that water off and then remove the supply line up just above that and you'll need to pull that of and then the next thing you'll need to do after you have got the water shut off is you need to flush the toilet and that gets out about 95% of the water that is in the water closet which is the bowl on the back of the toilet. Once you get 95% out then you can take a towel or a wash rag or something and dob out the rest of it and that should remove the water and you have got a good clean place to work. Then what you do, you'll have your float valve here and then you'll have a small tube that comes out from right here and sticks into the overflow valve and you need to remove that. Then next of all you would need, this is from underneath, you'll need to remove this nut right here and come off and then just a little gently you grab it from the top with a little gentle tug and sometimes you have got to move it back and forth but do it just very gently because this is plastic parts and likely the one you already have is plastic. Now just a little bit of tug and then it should come right up out of there and then sometimes there will be a little bit of residual water left in there and you might get a drip or two on the floor but you can put a little bowl under there to catch that or a little towel it shouldn't be very much water. Then you would get the new one and you take this new one and then you put this seal on, it has a seal right here and it would slide all the way up to the top and then you put it down into the water closet and then from underneath you will want to stick on this nut and then once you get this nut in place and you tighten it. Usually hand tight is all it takes and then you would want to put this tube back on and put it back into the overflow tube and there can be adjustments made right here and you can just do this and this is the linkage and it controls how much water actually goes in in the vent. You have a little bit of extra water going into the water closet and it is overflowing and it would cause your commode to run and it would waste a little bit of water and typically how you determine how much it is, you let it go nearly to the top of the overflow tube and you'll be able to see that and then you flush the toilet and if it flushes fine, then you're good.