Package included all the tools you need to perform the replacement of the carbon. Shipping is fast. I called in to confirm the parts with the package and representative is very helpful. Originally I thought I need to replace the entire system; however, replacing carbon only saved a lot of money. Just follow the instruction and should be easily replace it. One note is that after hook up the tank to the main water, you would still see some residue of the carbon first couple days when you turn on two shower faucets at the same time. After few days, you should be fine with water purification as original tank.