Nelson Irrigation 1000 Series Valves save energy with higher flow capacity and lower friction loss. The 1000 Series is geared to handle tough agricultural environments. The internal filter protects ports from plugging. here is no “continuous bleed” port which minimized blockage potential and the improved cage design more effectively passes debris. A modular design provides ultimate flexibility in valve style and connection type while simplifying installation, trouble-shooting and maintenance – great for the grower, installer and system designer!