In 1970 Carl Kah invented and patented the Modulated Pressure Control. This allowed for the control of the entire irrigation system of a golf course without wires or tubes. The patent was later sold to a manufacturer of golf course irrigation systems. That patent sale was the catalyst to founding K Rain Manufacturing in 1974.

• In-stem pressure regulator factory preset at 30 psi
• 1/2 in. female thread inlet
• Adjustable female thread nozzle adjusts from 0 – 360 degrees
• Co-molded wiper seal-ensures a leak-free, full pop up operation, even under low pressure situations, cartridge design allows for easy removal and cleaning
• Treated with UV inhibitors for long life, seal is microbe resistant to reduce degradation and stick-ups
• Ratcheting riser-permits quick, easy alignment of spray pattern
• Heavy-duty retraction spring-strongest spring in the industry for positive retraction in all soil conditions