The 6 in. 1800 Series pop-up spray head with Pressure Regulator and Seal-A-Matic™ check valve will prevent water waste. The check valve prevents low end drainage changes of up to 14'. check valve feature also helps reduce the risk of damage to your system by water hammer when your system is turned on. Pressure regulation ensures consistent performance throughout zone, optimizing flow and promoting a more even spray pattern. The This durable sprinkler is ideal for all lawn areas. All components are removable without special tools, providing quick and easy maintained of the sprinkler.