Magnum GURU®

Price: Contact us for purchase info: (877) 379-8258

SKU: 35°F: 470-010100-035 S 470-001000-000 FL 470-003000-000 FL-GX 470-004000-000 FL/FL-GX 470-005000-000

Product Description

Magnum GURU® Type-T 35°F
Magnum GURU® Type-T 40°F

Click here for Magnum GURU® product sheet
Click here for Magnum GURU® Installation and Maintenance Instructions
Click Here for GURU® Cap color table

Standard 35°F or 40°F setpoint temperature.


  • Locomotive engine cooling systems
  • Stand-by diesel heating circulators
  • Back up protection in event of shutdown
  • On-board tanks and piping


The Magnum GURU® Plug is a higher discharge capacity version of the standard GURU Plug. The Magnum GURU® Plug is a self-operating thermostatic drain valve that responds to engine coolant temperature and will pop open and drain when coolant reaches the setpoint (35°F or 40°F). This provides almost a full 1.2 inch bore to rapidly drain a locomotive before freeze damage can occur.

Resetting and rearming the Magnum GURU® Plug is easily accomplished by simply reheating the cartridge and utilizing the slotted actuator feature with the GURU Flag and Clip tool. This feature prevents the GURU Plug from triggering open again while refilling the cooling system with cold water.


  • Drains twice as fast as the standard GURU Plug
  • Will not trip or dump while locomotive is running
  • Straight SAE threads and O-ring seals provide for easy field maintenance and testing
  • Easy installation
  • Completely mechanical – No electrical or air connections
  • Not affected by air flow or air temperature surrounding valve – releases only when cooling water reaches setpoint
  • Easy system refill
  • Models available to convert existing freeze protection
  • Slotted actuator feature prevents nuisance dumps when refilling cooling system with cold water.
  • Unit automatically rearms after filling and reheating Actuator sensing surface is the only wetted part

Design Features

  • Actuator sensing surface is the only wetted part
  • Design excludes cooling water chemicals and other debris from moving parts
  • Long service life: All moving parts are stainless steel
  • Available in modified 1-1/4” NPT tee or flanged tee body styles
  • Paint mask minimizes accidental paint-ins
  • Knob on cartridge for easy installation and removal even in awkward locations

Magnum GURU® valves are covered by a one-year warranty