Hi, I'm Jeff Patterson with Hunter Repair Tutor, and today I'm going to share with you how to fix it running toilet by using Fluid Masters 400H Filvelle. The 400H replaces a variety of different Filvelle's, which you can see on the side of the box. Again, this is the 400H-002. When you open the box, there are only a few items in there. It's just the Filvelle, the instructions, and then some additional parts, which we're going to show you how to use a little bit later in the video. These 400H-00s Filvelle's have been around since the 1950's, so they've been around for a long time. First step is to turn the water off of the shutoff valve. The next step is to flush the toilet, and to remove the toilet tank to see how much water is left in there. Hold down on the lever of the toilet tank until most of the water is removed from the tank, and then you can use a sponge or a cloth to remove the excess water from the tank. This only takes a minute or two, it's super easy. Then remove the water supply line that's connected to the old Filvelle, and it's good to have a bucket for this. Remove the nut from the old Filvelle, and then take off the hose, and remove the Filvelle from the old toilet tank. Inspect the gasket on the new Filvelle. It's usually in the right position, but just double check that that's a case, and then insert the 400H down into the tank and dry-fit that hose. That's going to be important. We need to measure the height from the top of the flush valve to the top blue cap of the Filvelle. That needs to be three inches, so that's going to be a really important component for this installation. The other thing is, the top of the flush valve needs to be one inch below the tank lever location. We're going to unscrew the Filvelle, we're going to make it higher so that when we go to dry-fit it, we have the three inches between the top of the flush valve in the top of the Blue Cap there. This little clamp goes on top of the flush valve, and we're going to cut a rubber hose to the right size so that it won't be interfering with the bottom of the tank top. We're just putting that hose over into the slot of that little clamp, and we're just dry-fitting it. Now this nut is for the new Filvelle. We're going to put that on like so. You want to make sure that this is tight, because you don't need any other tools to tighten the Filvelle. We're going to add the supply line to the bottom of the Filvelle. Again, we're just going to be hand tightening all of these parts. You shouldn't need any type of tool. We're going to turn the water on, and we're going to let the water rise and see how high it goes to the top of the flush valve pipe. Now, in this case, there's a little knob for both the bowl, water, and the toilet tank water. We want to make sure that the water height is about one-half inch from the top of this pipe. You can make a mark on that, and you can turn the little lever to adjust the height. In this case, if you're turning it clockwise, you're going to raise the height in the toilet tank. You just want to flush it one more time, and let the water rise back up to ensure that it's about one-half inch below the top of that pipe. Now, we're going to check the water in the bowl. Make a mark on the inside of the bowl with a pencil. Pencil marks should be just above the water line. Then pour one gallon of water into the toilet bowl. But be careful. Don't do this too quickly, or it'll flush the toilet, which isn't good. So you want to pour the one gallon of water in slowly until it fills the bowl. Now, flush the toilet, and see where it refills in the bowl. If the water line is above your pencil mark, there's too much water in the bowl. If it's below that mark, there's too little, and you can adjust the height of the water in the bowl with this blue knob that's attached to the 400-H. It should only take 10 to 15 minutes to install this new 400-H fill valve, and it'll make your toilet run a lot quieter and have a more powerful flush.