How to Replace a Ball Valve
Many pipe systems use a ball valve to regulate the flow of either cool air, heat or water—though the most common use for a ball valve is for water. They do not sound like they have many parts to them so you may find yourself thinking that you will not need to replace them. However, there will be times where you may still need to replace old ones with newer ball valves. So let us take a look at how to replace them.
Step 1 - Buy New Valve and Other Supplies
First step is to buy everything you will need ahead of the time. You will need to know what type of pipes you have so you can buy the pipe section and a way to seal it off. If your pipe is made out of copper, you will need to use plumbers tape or sweat pipe joints. PVC can use pipe cement to hold them in place. You will also need to buy the pipe valve and spackle as well.
Step 2 - Turn off Water
Shut off water supply to the pipes that you will be working on. Once you have done that, turn on the faucet that is connected to the pipes to allow all water pressure that is sitting it there to drain out.
Step 3 - Access the Pipes
You will need to access the pipes in order to replace your ball valve. If it is a sink, you can access them underneath it. The bathtub faucet or shower pipes will need to be either via the basement crawlspace or via cutting the wall that has them attached.
So if needed, use this step to cut into the wall to access the pipes.
Step 4 - Cut Old Valve Out
Once you have full access to the pipes, you can use the hacksaw to cut out the pipe so you can remove the older ball valve that resides in the pipe. You can cut the sides of the pipe and you do not need to cut right besides where the valve is in it.
Remove the old valve via the two cuts that you have made.
Step 5 - Splice the Pipe
Using the new pipe section, splice it onto the part of the pipe that you had cut and allow enough width so that the ball valve can fit in. Then place one end of the spliced pipe into the coupler.
Step 6 - Put in New Valve
Secure the ball valve in with according the proper way of doing so with your pipes. Remember that copper pipes need sweat joints and you can use plumbers cement if you do not know how to weld. After it is secured into place, you can close up the pipe with the coupler that you have bought.
Step 7 - Test
Go ahead, turn the water back on, and turn on the faucets. Check for leaks in the pipes. If it appears that you have no leaks, you can turn off the water and close up the wall that the pipes are in. If you find a leak, go back through the steps to make the proper corrections that are needed. If you had to cut into the wall, place back the part you cut out and paint over it with spackle. If it was under the sink, you can just close the cabinets.