Originally Posted by txirrigation
What do you guys think?
In my experince many customers end up running the MPR so much longer that the water savings by the design goes null. Seems like I also get more coverage complaints on the MPR's. I space the 3000's @ 25', 2000 @ 17' (although they are pretty good at 20), and I do not use the 1000's bc they dont work that great.
Also if the customer does not keep the grass cut, the grass blades KILL the MPR streams while the single stream seems to perform OK in long grass. Although the grass should be cut to keep it under the riser hight, we all know the "I mow once every 3 weeks/month customer." Then they wonder why the grass is soooo grean by the sprinkler head, and dead out in the yard.
All this being said, the MPR definitly has advantages. If the customer cuts the grass and understands the concept, they will have much more uniformly green grass with the MPR.
I always try to gauge the home owner before I suggest one or the other.
I like the MP's if the situation is right (spacing within the range and right pressure). See the post I started about MP spacing. I don't like to knock regulars rotors down to say 25' when they would normally spray 35'. I feel this results in a poorer distribution pattern and more misting.
As far as run times if you are using a 2-4 gpm nozzle in a regular rotor then the precipitation rate is similiar to the MP. In reality the MP does not save water in that it takes a certain amount of water to cover an area no matter what head you are using. I feel it makes more efficient use of water by less vaporization in the before mentioned situations.
I never use 4" heads on MP's or sprays for new installation, always at least 6". One reason my bids are probably higher than my competitors. I have seen the grass overcome the riser height of a 4" head even in well kept lawns. If you are using 6" heads and the customer is letting the grass overcome them turn the system on so they can visually see this. If they can't get it then I guess there's not much more you can do. I always put a note on the bill about things like this so I can say "I informed you" if they bring it up again.