1/2" Diameter will handle the volume of maple sap from up to 50 taps:
The ultra-violet plastic tubing allows the sun light to transmit through the walls of the pipe so that sap remains 7-10 degrees F cooler than other gray or black plastic tubing on the market.  The walls are clear enough to see sap flow well, which will help to diagnose leaks in the tubing system.  Made from virgin polyethylene this plastic pipe is approved for potable water and is much easier to work with than much stiffer versions of black plastic pipe.    Leader 30P Mainline Tubing will help to ensure you are making the best quality syrup possible because cooler sap means less bacteria.  Less bacteria will lead to cleaner maple sap storage tanks, cleaner Reverse Osmosis machines, cleaner evaporators, and maple syrup that is easier to filter.  The maple syrup you make will also be lighter in color with a smoother maple flavor.