TeeJet AA6B DirectoValve Manual Control Valve with 200 PSI Pressure Gauge (Bundle, 2 Items): Industrial & Scientific. TeeJet AA6B DirectoValve Manual Control Valve with 200 PSI Pressure Gauge (Bundle, 2 Items): Industrial & Scientific. This bundle includes 2 items: (1) AA6B DirectoValve Manual Control Valve with (1) 200 PSI Pressure Gauge. The AA6B DirectoValve is a manual control valve that allows the user to manually open or close the flow to a section with the simple flip of the lever. This manual control valve has polypropylene, stainless steel, and polyethylene wetted parts for excellent corrosion resistance. For multiple boom control, valves can be arranged together using a hex nipple. Can be easily repaired without having to remove the valve from the spray line. A 200 PSI Pressure Gauge is included in this bundle. It can be used to measure pressure and assess any possible pressure problems. The pressure gauge has a maximum reading of 200 psi and easily installs with a wrench. It is glycerin-filled to reduce pulsation and lubricate the internal mechanism. 。 。 。