Rain Bird - RD06SP45F 6" RD1800 Series Spray Head With SAM Check Valve, 45 PSI Pressure Regulator, Flow-Shield PRBQKCHK100 there are 4 small perforated

there are 4 small perforated drainage holes on the bottom of the basin which can be cut out to remove standing water in the sump

Deluxe Impact Rotor with Seal-A-Matic

so you can see signal strength

Power Relay

Contamination-proof

Rain Bird - RD06SP45F 6" RD1800 Series Spray Head With SAM Check Valve, 45 PSI Pressure Regulator, Flow-Shield PRBQKCHK100 there are 4 small perforatedEvery landscape has elements that wear on your spray heads over timefrom sand and grit to high water pressure and harmful chemicals in reclaimed water. RD1800 was designed with these incredibly harsh conditions in mind. As the next evolution in spray heads from Rain Birdthe industry leader in spraysRD1800 was built with exclusive materials and features that stand up to the challenges of any setting. Ultimate Protection for Both Potable and Non Potable