Replace an underground irrigation spray head or mount on any riser. Sized for easy conversion of a Rain Bird 1806 pop-up spray head. Also connects to other standard 1/2 irrigation fittings. All in one unit includes 30 PSI regulator to avoid excess flow backflow preventer to stop water from flowing back into your home s system 200 mesh filter to trap rust and sediment helping to keep emitters flowing trouble free and swivel tee. Easy leak-proof connections.