Yes, you can.  Driplines are made of flexible tubing, which usually can withstand winter freezing quite well. To winterize your system, shut off your spigot and remove the faucet assembly.  Your timer, PSI regulator and mesh filter should all be stored indoors during winter. Then, remove the end caps from your mainline and allow it to drain.  After that, screw your end caps back on.  That’s all it takes to winterize a dripline system.