In one sentence, describe what the following article is about:

Place the new jet into the same place where you removed the old jet. Push the jet into the jet well until the back of it is flush against the tub. Begin to turn the jet clockwise. If you have trouble turning it, you can use a wrench. You may hear a click when it has been fully installed. Read the instructions that came with your new jets before fully installing them. Refill the water in your home spa or turn on your bathtub. Turn on your new jets. If they do not work properly, try the installation process again. There may be a problem with the home spa if the jets still do not work properly after inspection and re-installation.
Insert the new jet into the jet well. Rotate the jet clockwise. Check to see if the new jets work.