I recently finished installing a 8" Siphon Pipe system for my pond. Is teflon tape recommended to get the proper seal on the threaded components that screw into the "T" fiting? This is the component that comes off the main 8" pipe before going into the dam on the water side. I'm concerned about the 2" converter screw in. I have it together without teflon. Will I get a good seal on my system when the water gets high enough to create the syphon?