The super for the developer did a poor job of verifying that the irrigation sub had properly spaced the sprinklers and contemplated overlap and overall coverage. Not having had sprinklers before it took me a while to catch onto this, too late to address it before my year was out. Wanting to balance the system out without myself or a contractor having to dig up the lawn and splice new pipe in, I embarked upon a merry journey of selective replacement of rotator heads with sprays.
The sprays put out alot more water than the rotators, which is what I was looking for to more thoroughly drench some spots. Unfortunately, every spray one puts in a zone reduces the height that the other sprinklers will raise up out of the ground, and it reduces the water the rotators will put out.
Changing all the heads in a zone from rotators to sprays will not solve the problem either, as they will all put out feeble spray, leaving arid zones.
So it has finally ended up that I have a very few sprays in strategic locations, where the compromise of the rotators not rising up enough is worth it.
Being able to turn up the pressure or water volume in zones would be very handy, as all heads, both rotators and sprays, can be individually adjusted for fan arc etc, but I saw no way to do this on my system. The zone devices in the box with the purple lid are not adjustable, and whether they are or aren't, it seemed like some sort of pump in the line before them would be a good idea.
So no do not replace all your rotators with sprays.
Unrelated to this, everyone should get a main filter on their irrigation. As mentioned in threads here before, cleaning thirty individual heads is miserable work, and when we are in drought as we are now, the water being sent is full of muck, so that arduous cleaning job would have to be done again very soon. Much simpler just to flush or brush one big one.
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