Watchdog Oil Dryers

Watchdog Oil Dryers

Watchdog Oil Dryers are a passive drying system designed for bearing housings and other applications where moisture condensation must be minimized. Relative humidity is substantially reduced in most applications. The compact design and standard thread size are designed to simplify installation. Standby equipment can be protected from internal moisture damage when the Watchdog Oil Dryer is installed.


  • Watchdog Oil Dryers contain a 1″ NPT port for easy installation on ANSI and API pumps
  • Desiccant cartridges change from orange to dark green color to indicate when replacement is required
  • Cartridge replacement is simple and takes less than one minute
  • Engineered polymer provides high temperature rating and excellent corrosion resistance
  • Multiple purpose – serves as a viewport, a fill port and an oil dryer

Do you have a suggestion to improve this product? If so, you can submit your idea here. For special quote requests, please use our quote request form or contact our customer service team at 262.691.9336.

Instruction Sheets

SDS Sheets



Model No.DescriptionMaterialStyleConnection
31807Oil DryerPolysulfoneWith Viewport1 NPT
31808Oil DryerPolysulfoneWithout Viewport1/2 NPT
31848Oil DryerMetal/GlassWith Viewport1 NPT
31849Oil DryerMetal/GlassWith Viewport & Wire Guard1 NPT

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