Sprinkler issue Cancel The title field is required!

1. Bradley Frunchak

   

   24 posts
   
   5/24/2014 6:05 AM

   I have two sprinklers(retro fitted with Toro DT 30's, bodies are original from 15 years ago) on one green that both will turn about a full turn at full pressure and flow. After one turn they will both drop down to about a third of what they start at. Not sure why?
   
   Both sprinklers are on the same side of the green
   The two sprinklers on the other side work great
   I have changed the valves at the bottom of the heads
   The two sprinklers that are not working properly are on different stations on the satellite controller
   
   I have pulled the heads and risers to the lateral and flushed. I have put a camera into the lateral and see no obstructions.
   
   Not sure why these two are not working properly.

   
   
   
   
2. Jackson Reiswig

   

   0 posts
   
   5/24/2014 4:05 PM

   Are they on a loop or straight lined? Could there be a caddyshack repair in the swing joint or up the line a bit with an incorrect sized fitting used not allowing flow to keep up with the demand?

   
   
   
   
3. Steven Huffstutler

   

   11 posts
   
   5/24/2014 7:05 PM

   Is it a hydraulic system?

   
   
   
   
4. Bradley Frunchak

   

   24 posts
   
   5/24/2014 9:05 PM

   It is VIH.
   It is a closed loop around the green, but the sprinklers have performed fine in previous years and have started to act up this season.
   
   This morning I hooked a quickcoupler and hose into the sprinkler and hand watered a section of the green. Out of the hose I had excellent pressure and flow out of both heads. I am wondering if it is a solenoid issue or vent tube?
   
   All 4 heads run off the same common wire and the 2 troubling heads are on different stations, so that rules out voltage issue as the other head each is paired with work properly.
   
   I redid the electrical connections on both sprinklers 2 days ago.

   
   
   
   
5. Mark Van Lienden

   

   14 posts
   
   5/26/2014 7:05 AM

   switch one with one of the working heads and see if the problems move.

   
   
   
   
6. Keith Bennett

   

   2 posts
   
   5/26/2014 8:05 PM

   If the pressure is dropping it should either be something with the pilot valve or hydraulic line running alongside the head. The solenoid is either on or off so should not affect flow. If you have already changed out the bottom valves and flow from the pipe is good there isn't too much left. Not sure why they would be able to consistently work for a turn before loosing pressure though...