Easily connects to a faucet, garden hose, or Raindrip 1/2" poly hose. 50' of fully assembled Drip-A-Long . Built-in pressure compensating turbulent flow drippers spaced at 18" intervals. Nonclogging, patented pressure compensating drippers maintain a constant flow rate of 1 GPH (gallons per hour) with pressure up to 60 psi (pounds per square inch). Expandable to 400' with less than 5% variation in dripper outflow.