I have run 3/16 for several hundred feet on a shuflo with great results. I am running a 3/16 with 5/16 drops this year with a little better results so far but won't know untill the season is up. I have also run a shurflo on 5/16 with great success. The key to these is zero leaks and they need to be checked often. I can tell by the sap coming out of the pump!p if there are leaks. If the sap spits out of the line into the tank it is probably getting air from a leak. A tight system will give you a stream of sap with pauses here and there. Jeff
2021 230 Taps on vacuum
Smokylake 2X6 pan set with auto drawoff
Homebuilt 2 4x40 membrane RO
Homebuilt filter press
Rebuilt arch with under and over the fire air we have named V 2.0
Smokylake steam bottler
Hoods and preheater
500 gallon vertical polytank to store sap for RO
Adding a laser eye to my bottler for autofill/stop