do you need additional pieces to connect multiple systems?

Craig, the Professional Mist Cooling System can easily be expanded from the original kit of 6 nozzles/12-ft of mist line to 62 nozzles/124-ft (dependent upon your available water pressure). Simply remove the end plug from the last Slip-Lok fitting of your existing mist line and add additional Slip-Lok couplings with misting nozzle (Model 10121W), flexible tubing (Model 92225), and mounting clips (Model 10114H) to your desired length. Additional supplies can be found at your local retail store.