Description Morrison Bros-9095X-6100 AV top-fill overfill prevention valve designed to prevent overfilling storage tanks by providing a positive shut-off during a pressurized fill. Features Fill adaptor and shut-off mechanism are factory-assembled for ease of field installation Straight female threaded adaptor facilitates valve installation to a precise set point Minimum shut-off height is 1” from the tank top Full flow to shut-off point, cushioned closure eliminates shock Drop tube adaptor accepts 2” drop fill tubes (Morrison 419) Integral pressure relief Integral anti-siphon function 305C--2000 cap included with 1100 and 2200 models