Now there is no need for T fittings and ball valves this is an all in one flush kit and flow restrictor! Just turn the valve to flush for 15 minutes turn it back and go! Highly recommended. INCLUDED: (1)-100 GPD MEMBRANE FLUSH KIT. The manual flush kit works by bypassing the flow restrictor on your RO system and allowing a fast high speed flow of water to pass over the membrane surface and clean off any debris or scale that would otherwise clog and shorten the life span of your RO membrane. Our membrane flush kit will give you the ability to clean the membrane and improve the life and quality of your RO membrane. Now we have the newest design available. Flow restrictor and flush kit all built into one easy to use unit! Includes everything you need to install it. FLUSH KIT WITH 1/4 inch Quick connect fittings. Internal flow restrictor COMPLETE INSTRUCTIONS That's it! That's all you need!!