On an all plastic set up, this should not be necassary. As you unscrew the nut, a bit of water may drip out of the tank. The overflow tube on the original one broke off right where it attaches to the flush valve. It has unusually low viscosity, which allows it to penetrate very tight spaces easily. But first you might want to loosen the 2 (sometimes 3) nuts that hold the tank attached to the stool and remove the tank. Use a wire brush to loosen the mineral deposits around the nut. You can drive it off with a flat blade screwdriver. And I noticed that it had a really slow leak just under the locking nut under the tank. If this doesn't work, it's on to plan B, which is to cut the nut off. The end of the water … But this time it might have saved me from ripping a stem out of a tube so I thought it was worth a … Once that is done then you can attempt the Lock-Nut the same way, if the Fill Valve is too slippery then grab it with pliers as well. You have a shower socket set? I have done this before and always seem to have a problem. Empty the bucket and place it underneath the water supply line. Hello gigilinn and welcome to the community! Once those two steps were done, I was able to unscrew the screw under the toilet for the fill valve attachment without any further trouble. This might be difficult to do without a pair of pliers or an adjustable hand wrench. I hate that some asshole came up with that. just unscrew the big hex nut and the valve will come loose.. Edited 1 times. Detach the toilet fill valve. There's probably some minerals in there, but I suspect the original installer used some serious torque to ensure it wouldn't leak. Then, spray down the stuck valve with penetrating oil. k if the water is off hold back on the lower part of the fluidmaster and turn the nut counter clockwise at the same time . 2. Jarring the nut can break its bond to the bolt. 4. Penetrating oil is a special type of grease sold at home improvement centers and hardware stores. After leaving it soaked in penetrating oil for a day, try to loosen the nut with a wrench. Ordinary chrome sockets can't handle impact work … Brass fittings, primary used on hot or cold water lines to connect one piece of pipe to another, become stuck due to corrosion or over-tightening. Hello! Tighten the nut. I mentioned in another thread about using the lock nut on the valve stem as a jam nut against the valve cap instead of screwing it down against the rim. If this locking nut is not secure it can loosen and allow the stem nut to move axially to the point that the splines are disengaged; resulting in a loss of drive to the valve stem. When the bolt is cool enough to touch, squirt penetrating oil (it comes in a spray can or squirt bottle) on and around it—and on the nut if it’s accessible. This time I cannot remove the two plastic nuts under the tank, holding the metal intake tube to the tank and the valve. Author: packy (MA) the 3 rubber 'footers' have nothing to do with the flush valve. Easy way to go about it. Wipe off any remaining residues with a rag. Re: How to remove lock nut on bottom of flush valve? Loosen the bolt with an extended wrench. You will have to hold the inside piece with your hand while applying the pliers to the underside nut. 3. 0 0. Start by turning off the main water shut off valve to the house. 1. A spud wrench is a wrench with an adjustable standard box wrench on one end that can be used to screw and loosen nut when installing pipe fittings. Then try to loosen it using a correctly sized wrench. Good luck A utility knife or a hot utility knife should cut the nuts off easily. Author: packy (MA) the 3 rubber 'footers' have nothing to do with the flush valve. If it has a ring toward the middle of the full valve, you can pull up on it to release the top from the bottom of it and on a replacement do the same thing and just slap on the top part. Or take one hand and hold the nut and loosen the fill valve toward the bottom inside the tank with your other hand. The new fill valve will go on similar to how the old one came off. they are kohler's version of gaskets for the tank to bowl bolts. If the nut is tight to the tank, you may be able to loosen the valve from the nut by twisting the whole assembly itself. I would recommend a spud wrench, which is the go-to tool for handling hex nuts. Loosen the nut that secures the fill valve to the water supply line by turning it counterclockwise with pliers or a wrench. Attach the socket to the wrench and place it over the lock nut. Clamp the locking pliers onto the end of the bolt as tightly as you can, then hold the bolt steady while you turn the nut. Remove the nut, washer and lock nut. After breaking the "fins" off the nut while using wrench I tried holding the nut and turning the part in the tank. Tighten the fixture or plumbing nut with a wrench or locking pliers to break the grip of the mineral deposits; then turn in the opposite direction to loosen it. Cut if off Maybe, try to grip the valve on the inside of the tank. Put a wrench on the fixture or nut and strike the handle sharply with a hammer to loosen the fixture. Then, carefully pull the supply line out of the valve underneath the tank. It is OK to cut through the old fill valve as it is being replaced anyway. Once you’ve sprayed the valve, grip the valve with a plumber’s wrench, and use a rubber mallet or a ham… All else fails, very carefully hold a hacksaw blade inyour hand and cut the nut. Moving the nut in any direction is progress. I am trying to replace the flush valve in my toilet. One of the most reliable ways of loosening a tight lock nut is by hammering it. Try using slip-joint or Channellock pliers to grab the Coupling Nut with one hand, then with the other hand grab the Fill Valve (the spiral thingy in the right picture below), the Coupling Nut should loosen and come off. Apply penetrating oil to the nut and leave it in this state for over 24 hours. Otherwise you can use a wrench to loosen the lock, breaking off any rust that has accumulated therein. To make sure you hit the nut itself and not the surrounding threads, place a center punch on the nut and strike the punch with a hammer. Position the new valve in place of the faulty one. 0 0. Source(s): carpenter/handyman. Hopefully it will loosen the nut… Be careful though, as both these methods can damage your faucet. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. Why would you set the damn nut up in the tank removing nuts these... 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