Cold feed3/8 in compression to 1/4 in ODCompression cone and push-fit O-ring
RO water routes1/4 in OD push-fit tubingFeed, product, tank, and faucet lines stay color-coded.
Wastewater1/4 in OD wastewater tubingAir-gap or approved drain method remains a separate kit.
Sink drain1-1/2 in rigid P-trapKeep rigid DWV parts separate from RO flexible tubing.
Tube allowance3.0 m minimumIncludes route variation and service loops.