Pump Oil Sight Glass Type B UD-1603.69 fits the following Jetters Northwest Models:
3/8" JNW Premium Jetter Hose
3/8" BALL VALVE STEEL ZINC PLATED, 6kPSI
RED ALUMINUM HANDLE FOR 1/2" VALVE
4500 PSI UNLOADER BLACK SPRING
NEEDLE VALVE ASSY METERING VALVE PULSE VALVE