This should help:
1. First, remember that flow restrictors work to restrict flow in the waste stream exiting the RO membrane housing. By restricting flow in the waste stream, they "force" water to go through the membrane and exit through the permeate ("good water") port of the RO membrane housing.
2. The waste port is near the edge of the end of the RO housing. The permeate ("good water") port is at the center of the end of the housing. The combo kit you bought goes in line in the waste tubing. You should have tubing connected to the waste water port. Insert the downstream end of the tubing into one of the Tee's in your kit. Where water will exit the other Tee, connect another piece of tubing and run it wherever you'd like to route your wastewater.
3. Remember that you are installing a new (adjustable) flow restrictor: the Tee with the chrome thumb screw. You must remove your old flow restrictor.
4. Close the ball valve (place the arm of the valve perpendicular to the water flow). Now adjust the thumb screw so you have 4 parts waste water to 1 part permeate. Check this ratio periodically, especially when the temperature of your tap water changes in early winter and in spring. Adjust the thumb screw to maintain a 4:1 ratio.
To flush the RO housing, open the blue-handled ball valve, and allow water to rush from the RO housing through the waste line - you'll note the when you open the flush valve, you are allowing water to bypass the flow restrictor entirely. This action will flush deposits from your RO housing. Flush the housing for approximately 30 seconds.
Ideally, flush the RO housing each time you shut off flow through the unit. If that’s not practical, once a week is better than once a month is better than once a year.
