Signature 63XB ADV Series Spray Heads (Less Nozzle)
-The 63XB series comes with all the same great features as the standard 63XA model with the addition of the anti-drain valve (ADV).
-The anti-drain valve (ADV) will prevent low head drainage and prevent flooding or erosion.
-Will hold back up to 10 ft (3 m) difference in elevation.
-All models can be upgraded to use iStop with installation of retrofit kit 63XR.