Try turning it again.
Toilet water supply line stuck.
Try to open the stuck valve now that the oils had a chance to work.
If the line is a flex line it may be stuck with a bit of mineral buildup.
Repeat this as many times as necessary until the stuck water valve opens closes all the way.
Try gently pushing it in different directions while pulling down.
The heat will make the fixture or nut expand which may.
By now you know you have a problem after following steps 1 9 it is taking some effort to get it done so a small amount of the best penetrating oil no matter what the penetrating oil costs is worth it.
Otherwise you ll find yourself dealing with a gusher if the valve cracks or the pipe breaks.
Tap again with the hammer to help the oil work its way into the valve.
Here is a video showing you how to handle a situation in which the water shut off valve or angle stop does not want to close or shut off.
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It s a good idea to shut off the water supply before you try to bully a valve into submission.
A stuck shut off to a toilet needs penetrating oil.
Due to age rust corrosion and mineral deposits from hard water the valve can fail to function properly.
That supply line should be disconnected at the shutoff valve as well and should then be fairly easy to bend and remove.
Apply thebest penetrating oilpossible.
The plastic nut at the base of the tank can then be removed to change out the fill valve.
White vinegar and a wire brush will help.
If the valve moves at all add a little more penetrating oil to it.
Try gently tapping the water valve with a hammer to help the oil penetrate the valve.
Once the supply is closed off scrub away any crusty residue on the outside of the valve and anywhere you can safely dig in.
Apply heat to the stuck fixture or plumbing nut with a hair dryer or heat gun.
Try gently wiggling it back and forth.
Used to connect the water supply to your toilet this connector features a high tenacity multi filament yarn.
If the line is made from solid copper often chrome plated it sometimes has a bit of tension in it making it appear to be stuck to the fixture.
Drain all water out of the fixture before applying the heat.
