Limited to one entry per customer. First 200 customers to submit a request. Limited Quantities are available. It really is FREE. The standard cost of the K3 RO System is $1,295. 100% Installation, Labor, and Materials included in standard under-sink installation with economy faucet. Other installation options are available based on the home configuration and customer preferences. $1,295 value can be used as credit to upgrade to Kinetico K5 Drinking System, Kinetico Softener or Combo system.