Question: How do I install a flow restrictor fitting in the membrane housing?

Answer:

These instructions are for the installation of a flow restrictor fitting (as a replacement or upgrading of Reverse Osmosis system capacity) into the membrane housing. The flow restrictor is installed into the drain port (outlet) on the membrane housing. Your membrane housing will have two ports on one end and only one port on the other end. The end that has two ports is where you want to install this fitting. The drain port will have tubing going to the drain. The other port on the same end will have a short line going to the auto control valve so you can easily tell which port to install the flow restrictor. You will currently have a fitting in the drain port with the drain tubing connected to it. Take the tubing out of the fitting and then remove the fitting from the port. Examine the fitting to see if it is a flow restrictor (if it is open on both ends of the fitting, it is not a flow restrictor and then you will have an in-line flow restrictor that needs to be removed also. Screw the new flow restrictor into theport and the insert the tubing into the other end of the flow restrictor fitting. Tighten the nut around the tubing and you will be ready to go.