A lot of parents opt for a handheld jetted shower head head system simply due to the fact that it can be adjusted to anyone, from a toddler to a super-tall person. All we have left are the facet joints, or how the bones of the spine fit together, and the nerves -- don't forget, the back also holds a major part of the body's central nervous system. Be sure to remove any old PTFE tape and re-apply new tape...
