Yes, there are sprinkler heads available that will help with water conservation. MP Rotator, made by Hunter, is just one of the brands. You can read more about them by visiting http://www.hunterindustries.com/products/mprotator/.
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If you utilize an in-ground sprinkler system, relocating sprinklers will require you to tear up most of your lawn as you will need to reroute pipes and sprinkler heads. For above ground sprinkler systems, relocating sprinkler heads is fairly easy and is completely dependent on the length of your hose.
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Upright heads
Fire sprinklers have two major components that operate in response to a fire: the fire sprinkler heads which are connected via a series of pipes to a fire pumps. Water pressure is kept in the head by a series of valves in the pump. and is kept in the heads by little vials of colored liquid. During a fire, the liquid inside the sprinkler heads heats up and starts to expand, eventually causing the vial to burst. Water that was kept in the pipes pours out of the sprinkler heads. The water pouring out of the sprinkler heads causes the pressure in the fire pump to drop. In response, the pump kicks on and pumps more water from the municipal water supply to keep the sprinkler flowing. NOTE: this is how "wet pipe" fire sprinklers, the most common types of fire sprinklers, work. Other sprinklers (dry pipe, deluge and pre-action) are slightly different.
An automatic sprinkler system is a system in which sprinkler heads are fixed in piping system were pipe is fully filled with water or air under pressure and, at a certain calibrated temperature, sensing elements in sprinkler head breaks and allows water flow. Other types of systems rely upon electrical sensors (smoke and heat sensors, or manual switches) to initiate the flow or to pressurize the pipe so that sprinkler heads activated by the heat will flow water. Somewhat more rare systems, for extremely high hazards such as rubber tire storage in a warehouse, may have sprinkler heads that are always "open", allowing the entire room to be flooded when the pipe is pressurized.
You will not have any pressure after the first few sprinkler heads.
you can use what ever kind of paint you want to
There should be some sort of adjustment screw on top of the sprinkler head, otherwise you can change out the nozzle.
Rasco 1993 H - K 14.2
In the past the FDC was optional. NFPA 13: Standard for the Installation of Sprinkler Systems now requires the connection except for systems of 20 sprinkler heads or less, or when permission has been obtained from the authority having jurisdiction. Sources- Brannigan & Corbett- Building Construction for the Fire Service (4th Ed) 2008. The above is a direct quote on page 288 if you so need it for a paper. So when you have more than 20 sprinkler heads, or when you have obtained permission. Doug E.