The HUNTER Pro-Spray Drain Check Valve is made specifically to be installed inside of Hunter Pro-Spray heads.          
Prevents drainage at heads installed at an angle, protecting landscapes from damage & erosion
Reduces amount of water needed to fill the pipes each time sprinklers begin running
Can be field installed
Application: For use in sprinkler heads where low head drainage is a problemHow to install:
Step 1: Loosen the body cap & remove the internal assembly from the sprinkler body. Turn the internal assembly upside down to access the opening in the bottom of the riser
Step 2: Insert the large, irregular shaped end of the Pro-Spray Drain Check Valve assembly into the bottom of the riser. The small circular rubber portion of the Drain Check Valve assembly will remain outside of the riser
Step 3: Replace the internal assembly & tighten it into the body
Hunter Industries is a global manufacturer of a full range of high-quality irrigation products from controllers, rotors, rotary sprinklers, spray head sprinklers, nozzles, valves, weather drips and much more.