Model 390 With 1″ MNPT

The Model 390 has an automotive type radiator cap. It is supplied with a 3/16″ hole in the filler neck.

Model Number:
- 390-7 (7 lb. Pressure Rating)
- 390-15 (15 lb. Pressure Rating)

Model 29508 With 1″ MNPT

The Model 29508 has an automotive type radiator cap. It is supplied with a 1/4″ OD overflow tube in the filler neck.

Model Number:
- 29508-7 (7 lb. Pressure Rating)
- 29508-15 (15 lb. Pressure Rating)

Model 83269 With 1-1/2″ MNPT

The Model 83269 has an automotive type radiator cap. It is supplied with a 5/16″ OD overflow tube in the filler neck.

Model Number:
- 83269-7 (7 lb. Pressure Rating)
- 83269-15 (15 lb. Pressure Rating)

Model 1794 With 2″ FNPT

The Model 1794 has a truck radiator cap. It is supplied with a 5/16″ OD overflow tube in the filler neck.

Model Number:
- 1794-7 (7 lb. Pressure Rating)
- 1794-15 (15 lb. Pressure Rating)