Tips for fixing bath tub knob?

When I turn on the Cold knob water run from it also tips on fixing this problem, thanks in advanceTips for fixing bath tub knob?
shut the water off at your tub it may be in the wall or in the basement .pop off the little C cap on the knob with knife and then get a star screwdriver and remove the screw hidden under it...then pull off the knob ,then u will need a adjustable wrench or some plyers to take the valve out...there is a little black rubber O ring inside that needs to be replaced.go to hardware store and get the same O ring ,just ask for help if the old O ring is too messed up to compare with a new one for size they know which one is right for tubs...then just go put it back together ,turn on the water %26amp; presto problem solved


good luckTips for fixing bath tub knob?
Sounds like you need to rebuild the valve, or replace it, which is easier and consider doing the hot water while you are at it. First turn off the water to the faucet, use in-line shutoffs if you have them at the water entry if you don't. Next remove the handle. It is usually held on with a screw which is covered with a trim piece at the center of the knob. Next remove the trim which fits around the stem and presses against the wall and either unscrews or is held in place with a nut. Put the handle back on (without the screw) and back out the valve. Take it to a hardware store or home center and they should be able to help find the parts you need or a replacement valve and valve grease. Use the grease to coat any rubber/plastic sealing parts and reassemble the valve in the reverse order of disassembly, turn the water back on and you are done.
Pop the cover cap off of the end of the handle. Remove the screw that holds the handle on. Pull the handle straight off. If it will not come off, you may need to use WD-40 or wrap a rag soaked with vinegar around it and let it sit a while. Once the handle is removed, turn the exposed stem with a pair of pliers. See if the water is coming out from the nut that is holding the stem in. If so, just open the faucet again and tighten the nut. It is called a packing nut and it's purpose is to keep water from flowing out when the faucet is opened. If the water isn't coming from the nut, now you need to shut the water supply off. Most tubs do not have supply valves so you will probably have to shut off the main water valve. Remove the nut, unscrew the stem and replace the rubber washer that is on the end of it. Take the stem with you to get the proper washer. Reverse this procedure to reinstall the faucet. As long as the water is off, you might as well replace the hot washer also.