A 4-inch head that usually sprays out 25 to 30 feet.
A 6-inch head that usually sprays 30 feet +.
Purple sprinkler heads:
In the State of Texas, it is a requirement that the sprinkler heads used with your aerobic septic system be purple.
The purple top designates that there is reclaimed wastewater being discharged by that sprinkler head and that the water is not for drinking or part of an irrigation system.
The black irrigation-type sprinkler heads are not made to withstand the pressure exerted on them from the water being pumped through the sprinkler lines by the effluent pump.
The appropriate purple sprinkler heads can usually be obtained at a plumbing supply or from your service provider. We also sell the sprinkler heads through this web site.