Marci, The piping from the water heater may be leaking. This is a problem because with a seven year old heater, when it is disturbed at this location it may leak more.
My suggestion is to have the piping replaced from the heater, usually a brass pipe. Be prepared for this to be an unrepairable leak which means the water heater may need to be replaced.
The Local Plumber
Tustin, California http://www.TheLocalPlumber.com