The answer is yes if you are purchasing any of these sprayers: Comfort 8-Pattern Sprayer, 7-Function Spray Gun, Brass Spray Nozzle, Compact Flow Control Spray Nozzle or Fan Nozzle with Flow Control.  You'll need either an Accessory Connector or Accessory Connector with Swivel.  All of the other sprayers & wands come with a connector included free.  If you already have this connection, unless you are already purchasing a complete nozzle set such as our Water Wise Starter Kit or already have a fitting at home. The Starter Kits are a good way to save money on the purchase of your sprayers.