GREATWeLL ROC400 Installation Tips 5. Use the RED TUBING to connect to the 11Tap water 11 port and the installed feed water adapter. Use the BLUE TUBING to connect to the 11 Purified Water11 port and the faucet. Use the WJ=O[f[f§ 'ITM�D� to connect to the 11 11 Concentrated Water port and the installed drain saddle. The YELLOW TUBING can be put aside just in case a replacement is needed. Make sure to insert the tubing into the port about 1/2 11 deep to ensure a leak free connection. 6.