We installed a new hot water heater about 2 years ago when adding on a new master bath to our 1900 farm house. Was a long, slow project as money would allow and the shower wasn't used for over a year once it was installed, since the rest of the room wasn't done. Now that it's done, there is sediment in the hw tank. We found out during the first shower. We have a shower tower that hangs on the wall (one big self enclosed unit with seperate heads). I know i need to drain and flush the HW heater until water is clear, but how do i get the sediment out of the shower lines and shower heads on this unit? it clogged up in less than a few minutes. The tower hooks up like a clothes washing machine, and hangs on the wall, so i can get it off the wall. do i stick a needle into every little jet (hole) to clear it or did i ruin it? Advice for a novice like me?