Rain Bird - ESP9V4 - (4-Zone) Battery-Operated Controller Accessories_Surge Protection What does the pressure-balance function

What does the pressure-balance function do

Precision stamped brass debris grate

How many zones does this part provide

Curved beverage and entertaining stations

Rain Bird - ESP9V4 - (4-Zone) Battery-Operated Controller Accessories_Surge Protection What does the pressure-balance functionSpec Sheet Install Manual Tougher, Easier and Longer Lasting Get reliable automatic irrigation control when you don't have AC power with the ESP 9V Series Battery Operated Controller. The ESP 9V's waterproof case and dual sealed battery chamber ensure long life even when installed in a wet, muddy valve box. In harsh environment testing the ESP 9V outlasted the competition by 70%. After being submerged in water at alternating extreme hot and cold